diff --git a/.bzr-mysql/default.conf b/.bzr-mysql/default.conf
index 43d479a1043..772f1d15b92 100644
--- a/.bzr-mysql/default.conf
+++ b/.bzr-mysql/default.conf
@@ -1,4 +1,4 @@
 [MYSQL]
-post_commit_to = "commits@lists.mysql.com"
-post_push_to = "commits@lists.mysql.com"
-tree_name = "mysql-5.5"
+post_commit_to = "MYSQL_COMMITS_SECURITY_WW@ORACLE.COM"
+post_push_to = "MYSQL_COMMITS_SECURITY_WW@ORACLE.COM"
+tree_name = "mysql-5.5-security"
diff --git a/VERSION b/VERSION
index d05c93f6e73..508f021f35d 100644
--- a/VERSION
+++ b/VERSION
@@ -1,4 +1,4 @@
 MYSQL_VERSION_MAJOR=5
 MYSQL_VERSION_MINOR=5
-MYSQL_VERSION_PATCH=21
+MYSQL_VERSION_PATCH=20
 MYSQL_VERSION_EXTRA=
diff --git a/dbug/dbug.c b/dbug/dbug.c
index 8b3927d2427..cac544b6cd3 100644
--- a/dbug/dbug.c
+++ b/dbug/dbug.c
@@ -1863,6 +1863,8 @@ static void DBUGOpenFile(CODE_STATE *cs,
     name=cs->stack->name;
     if (strcmp(name, "-") == 0)
     {
+      if (!is_shared(cs->stack, out_file))
+        DBUGCloseFile(cs, cs->stack->out_file);
       cs->stack->out_file= stdout;
       cs->stack->flags |= FLUSH_ON_WRITE;
       cs->stack->name[0]=0;
@@ -1885,6 +1887,8 @@ static void DBUGOpenFile(CODE_STATE *cs,
         }
         else
         {
+          if (!is_shared(cs->stack, out_file))
+            DBUGCloseFile(cs, cs->stack->out_file);
           cs->stack->out_file= fp;
         }
       }
diff --git a/libmysql/get_password.c b/libmysql/get_password.c
index c3428dd2838..a10d112ccd0 100644
--- a/libmysql/get_password.c
+++ b/libmysql/get_password.c
@@ -71,9 +71,9 @@ void get_tty_password_buff(const char *opt_message, char *to, size_t length)
   _cputs(opt_message ? opt_message : "Enter password: ");
   for (;;)
   {
-    char tmp;
+    int tmp;
     tmp=_getch();
-    if (tmp == '\b' || (int) tmp == 127)
+    if (tmp == '\b' || tmp == 127)
     {
       if (pos != to)
       {
@@ -82,15 +82,13 @@ void get_tty_password_buff(const char *opt_message, char *to, size_t length)
 	continue;
       }
     }
-    if (tmp == '\n' || tmp == '\r' || tmp == 3)
+    if (tmp == -1 || tmp == '\n' || tmp == '\r' || tmp == 3)
       break;
     if (iscntrl(tmp) || pos == end)
       continue;
     _cputs("*");
-    *(pos++) = tmp;
+    *(pos++) = (char)tmp;
   }
-  while (pos != to && isspace(pos[-1]) == ' ')
-    pos--;					/* Allow dummy space at end */
   *pos=0;
   _cputs("\n");
 }
@@ -137,8 +135,6 @@ static void get_password(char *to,uint length,int fd, my_bool echo)
     }
     *(pos++) = tmp;
   }
-  while (pos != to && isspace(pos[-1]) == ' ')
-    pos--;					/* Allow dummy space at end */
   *pos=0;
   return;
 }
diff --git a/mysql-test/include/wait_until_disconnected.inc b/mysql-test/include/wait_until_disconnected.inc
index c274fbbe089..71361682442 100644
--- a/mysql-test/include/wait_until_disconnected.inc
+++ b/mysql-test/include/wait_until_disconnected.inc
@@ -12,7 +12,7 @@ while (!$mysql_errno)
   # Strangely enough, the server might return "Too many connections"
   # while being shutdown, thus 1040 is an "allowed" error.
   # See BUG#36228.
-  --error 0,1040,1053,2002,2003,2006,2013
+  --error 0,1040,1053,2002,2003,2005,2006,2013
   show status;
 
   dec $counter;
diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index aa7da22d20c..76ea349cd83 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -584,6 +584,7 @@ sub main {
     }
     mtr_report_test($tinfo);
     push @$completed, $tinfo;
+    ++$num_tests
   }
 
   mtr_print_line();
@@ -599,7 +600,8 @@ sub main {
 
   if ( @$completed != $num_tests)
   {
-    mtr_error("Not all tests completed");
+    mtr_error("Not all tests completed (only ". scalar(@$completed) .
+              " of $num_tests)");
   }
 
   remove_vardir_subs() if $opt_clean_vardir;
diff --git a/mysql-test/r/create.result b/mysql-test/r/create.result
index b63131fcca6..fbc8e3d28e2 100644
--- a/mysql-test/r/create.result
+++ b/mysql-test/r/create.result
@@ -1562,6 +1562,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	7
 drop table t1,t2;
 CREATE TABLE t1(c1 VARCHAR(33), KEY USING BTREE (c1));
diff --git a/mysql-test/r/derived_opt.result b/mysql-test/r/derived_opt.result
index 721d4277775..c5376bee756 100644
--- a/mysql-test/r/derived_opt.result
+++ b/mysql-test/r/derived_opt.result
@@ -273,4 +273,13 @@ ON alias3.f4 != 0
 ) ON alias3.f4 != 0;
 f4	f4	f2	f4
 drop table t1,t2,t3,t4;
+#
+# LP BUG#910123 MariaDB 5.3.3 causes 1093 error on Drupal
+# Fix: force materialization in case of conflict
+#
+SET optimizer_switch='derived_merge=on';
+CREATE TABLE t1 ( i INT );
+INSERT INTO t1 VALUES ( (SELECT 1 FROM ( SELECT * FROM t1 ) as a) );
+drop table t1;
+set optimizer_switch=@save_optimizer_switch;
 set optimizer_switch=@exit_optimizer_switch;
diff --git a/mysql-test/r/derived_view.result b/mysql-test/r/derived_view.result
index 587a1dd9e31..4756daaf687 100644
--- a/mysql-test/r/derived_view.result
+++ b/mysql-test/r/derived_view.result
@@ -80,6 +80,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 select * from (select * from t1 where f1 in (2,3)) tt where f11=2;
@@ -93,6 +94,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	12
 for merged views
 create view v1 as select * from t1;
@@ -165,6 +167,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 select * from v4 where f2 in (1,3);
@@ -178,6 +181,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	12
 for materialized derived tables
 explain for simple derived
@@ -229,6 +233,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 select * from t1 join (select * from t2 group by f2) tt on f1=f2;
@@ -244,6 +249,7 @@ Handler_read_last	0
 Handler_read_next	3
 Handler_read_prev	0
 Handler_read_rnd	11
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	36
 for materialized views
 drop view v1,v2,v3;
@@ -318,6 +324,7 @@ Handler_read_last	0
 Handler_read_next	22
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	60
 explain showing late materialization
 flush status;
@@ -334,6 +341,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 select * from t1 join v2 on f1=f2;
@@ -349,6 +357,7 @@ Handler_read_last	0
 Handler_read_next	3
 Handler_read_prev	0
 Handler_read_rnd	11
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	36
 explain extended select * from v1 join v4 on f1=f2;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
@@ -443,6 +452,7 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	8
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	39
 flush status;
 merged in merged derived join merged in merged derived
@@ -1089,7 +1099,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t3	system	NULL	NULL	NULL	NULL	1	100.00	
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 Warnings:
 Note	1003	select 6 AS `a`,5 AS `b` from `test`.`t3` where (not(<expr_cache><6,5>(<in_optimizer>((6,5),<exists>(select 7,5 having (trigcond(((<cache>(6) = 7) or isnull(7))) and trigcond(((<cache>(5) = 5) or isnull(5))) and trigcond(<is_not_null_test>(7)) and trigcond(<is_not_null_test>(5))))))))
 SELECT t.a,t.b FROM t3 RIGHT JOIN ((SELECT * FROM t1) AS t, t2) ON t2.b != 0 
@@ -1103,7 +1113,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t3	system	NULL	NULL	NULL	NULL	1	100.00	
-3	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+3	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 Warnings:
 Note	1003	select 6 AS `a`,5 AS `b` from `test`.`t3` where (not(<expr_cache><6,5>(<in_optimizer>((6,5),<exists>(select 7,5 having (trigcond(((<cache>(6) = 7) or isnull(7))) and trigcond(((<cache>(5) = 5) or isnull(5))) and trigcond(<is_not_null_test>(7)) and trigcond(<is_not_null_test>(5))))))))
 SELECT t.a,t.b FROM t3 RIGHT JOIN (v1 AS t, t2) ON t2.b != 0 
@@ -1117,7 +1127,7 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
 1	PRIMARY	t3	system	NULL	NULL	NULL	NULL	1	100.00	
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 Warnings:
 Note	1003	select 6 AS `a`,5 AS `b` from `test`.`t3` where (not(<expr_cache><6,5>(<in_optimizer>((6,5),<exists>(select 7,5 having (trigcond(((<cache>(6) = 7) or isnull(7))) and trigcond(((<cache>(5) = 5) or isnull(5))) and trigcond(<is_not_null_test>(7)) and trigcond(<is_not_null_test>(5))))))))
 DROP VIEW v1;
@@ -1800,6 +1810,7 @@ INSERT INTO t2 VALUES (7), (4);
 CREATE TABLE t1 (b int NOT NULL);
 INSERT INTO t1 VALUES (5), (7);
 CREATE ALGORITHM=MERGE VIEW v1 AS SELECT * FROM t1;
+SET @save_optimizer_switch=@@optimizer_switch;
 SET SESSION optimizer_switch='derived_merge=off';
 PREPARE st1 FROM
 'SELECT * FROM (SELECT * FROM t2 LEFT JOIN v1 ON t2.a = v1.b) AS t';
@@ -1812,9 +1823,9 @@ a	b
 7	7
 4	NULL
 DEALLOCATE PREPARE st1;
+set SESSION optimizer_switch= @save_optimizer_switch;
 DROP VIEW v1;
 DROP TABLE t1,t2;
-SET SESSION optimizer_switch='derived_merge=on';
 #
 # LP bug #879939: assertion in ha_maria::enable_indexes 
 #                 with derived_with_keys=on
@@ -1832,6 +1843,7 @@ INSERT INTO t1 VALUES
 ('USA','Mesquite'), ('USA','Metairie'), ('USA','Miami');
 CREATE TABLE t3 (a varchar(35));
 INSERT INTO t3 VALUES ('Miami');
+SET @save_optimizer_switch=@@optimizer_switch;
 SET optimizer_switch = 'derived_with_keys=on';
 SET @@tmp_table_size=1024*4;
 explain SELECT * FROM (SELECT t1.* FROM t1, t2) AS t JOIN t3 ON t3.a = t.b;
@@ -1855,6 +1867,7 @@ USA	Miami	Miami
 USA	Miami	Miami
 USA	Miami	Miami
 SET @@tmp_table_size=default;
+set SESSION optimizer_switch= @save_optimizer_switch;
 drop table t1,t2,t3;
 #
 # BUG#882994: Crash in QUICK_RANGE_SELECT::reset with derived_with_keys
@@ -1889,5 +1902,42 @@ ORDER BY CONCAT(alias2.col_varchar_nokey);
 col_varchar_key	pk	col_varchar_key	col_varchar_nokey
 set max_heap_table_size= @tmp_882994;
 drop table t1,t2,t3;
+#
+# LP bug #917990: Bad estimate of #rows for derived table with LIMIT
+#
+CREATE TABLE t1 (a int);
+INSERT INTO t1 VALUES
+(8), (3), (4), (7), (9), (5), (1), (2);
+SELECT * FROM (SELECT * FROM t1 LIMIT 3) t;
+a
+8
+3
+4
+EXPLAIN
+SELECT * FROM (SELECT * FROM t1 LIMIT 3) t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	3	
+2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	8	
+DROP TABLE t1;
+#
+# LP BUG#921878 incorrect check of items during columns union types
+# aggregation for merged derived tables
+#
+SET @save_optimizer_switch=@@optimizer_switch;
+SET SESSION optimizer_switch='derived_merge=on';
+CREATE TABLE t1 ( a ENUM( 'x', 'y' ) );
+insert into t1 values ('x');
+CREATE TABLE t2 LIKE t1;
+insert into t1 values ('y');
+CREATE TABLE t3 LIKE t1;
+INSERT INTO t3
+SELECT * FROM ( SELECT * FROM t1 ) AS A
+UNION SELECT * FROM t2;
+select * from t3;
+a
+x
+y
+drop table t1,t2,t3;
+set SESSION optimizer_switch= @save_optimizer_switch;
 set optimizer_switch=@exit_optimizer_switch;
 set join_cache_level=@exit_join_cache_level;
diff --git a/mysql-test/r/func_group.result b/mysql-test/r/func_group.result
index c39a226303b..aa93424f2ae 100644
--- a/mysql-test/r/func_group.result
+++ b/mysql-test/r/func_group.result
@@ -1825,6 +1825,70 @@ drop table t1;
 #
 End of 5.1 tests
 #
+# Bug #904345: MIN/MAX optimization  with constant FALSE condition
+#
+CREATE TABLE t1 (a int NOT NULL, KEY(a));
+INSERT INTO t1 VALUES (10), (8), (11), (7), (15), (12), (9);
+CREATE TABLE t2 (a int, b int);
+INSERT INTO t2 VALUES
+(8,2), (6,9), (8,4), (5,3), (9,1);
+EXPLAIN EXTENDED
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT 3,4) AND a<10;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t1	range	a	a	4	NULL	4	100.00	Using where; Using index
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+Warnings:
+Note	1003	select max(`test`.`t1`.`a`) AS `MAX(a)` from `test`.`t1` where (<expr_cache><<cache>(1),<cache>(2)>(<in_optimizer>(<cache>((1,2)),<exists>(select 3,4 having (((1 = 3) or isnull(3)) and ((2 = 4) or isnull(4)) and <is_not_null_test>(3) and <is_not_null_test>(4))))) and (`test`.`t1`.`a` < 10))
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT 3,4) AND a<10;
+MAX(a)
+NULL
+EXPLAIN EXTENDED
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT a,b FROM t2 WHERE b<5) and a<10;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	10	func,func	1	100.00	
+1	PRIMARY	t1	range	a	a	4	NULL	4	100.00	Using where; Using index; Using join buffer (flat, BNL join)
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where
+Warnings:
+Note	1003	select max(`test`.`t1`.`a`) AS `MAX(a)` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b` = 2) and (`test`.`t2`.`a` = 1) and (`test`.`t1`.`a` < 10))
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT a,b FROM t2 WHERE b<5) and a<10;
+MAX(a)
+NULL
+EXPLAIN EXTENDED
+SELECT MAX(a) FROM t1 WHERE RAND()*0<>0 AND a<10;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	range	a	a	4	NULL	4	100.00	Using where; Using index
+Warnings:
+Note	1003	select max(`test`.`t1`.`a`) AS `MAX(a)` from `test`.`t1` where (((rand() * 0) <> 0) and (`test`.`t1`.`a` < 10))
+SELECT MAX(a) FROM t1 WHERE RAND()*0<>0 AND a<10;
+MAX(a)
+NULL
+DROP TABLE t1,t2;
+#
+# Bug #879860: MIN/MAX for subquery returning empty set 
+#
+CREATE TABLE t1 (a int PRIMARY KEY);
+INSERT INTO t1 VALUES (1);
+CREATE TABLE t2 (a int NOT NULL);
+INSERT INTO t2 VALUES (10);
+CREATE TABLE t3 ( a int, b int);
+INSERT INTO t3 VALUES (19,1), (20,5);
+EXPLAIN EXTENDED
+SELECT (SELECT MIN(t1.a) FROM t1,t2 WHERE t2.a = t3.b) FROM t3;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	100.00	
+2	DEPENDENT SUBQUERY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
+2	DEPENDENT SUBQUERY	t2	system	NULL	NULL	NULL	NULL	1	100.00	
+Warnings:
+Note	1276	Field or reference 'test.t3.b' of SELECT #2 was resolved in SELECT #1
+Note	1003	select <expr_cache><`test`.`t3`.`b`>((select min(1) from dual where (10 = `test`.`t3`.`b`))) AS `(SELECT MIN(t1.a) FROM t1,t2 WHERE t2.a = t3.b)` from `test`.`t3`
+SELECT (SELECT MIN(t1.a) FROM t1,t2 WHERE t2.a = t3.b) FROM t3;
+(SELECT MIN(t1.a) FROM t1,t2 WHERE t2.a = t3.b)
+NULL
+NULL
+DROP TABLE t1,t2,t3;
+#
+End of 5.2 tests
+#
 # BUG#46680 - Assertion failed in file item_subselect.cc, 
 #             line 305 crashing on HAVING subquery
 #
diff --git a/mysql-test/r/handler_read_last.result b/mysql-test/r/handler_read_last.result
index a21e9ed9564..574c3c25ab1 100644
--- a/mysql-test/r/handler_read_last.result
+++ b/mysql-test/r/handler_read_last.result
@@ -13,6 +13,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 SELECT a FROM t1 ORDER BY a DESC LIMIT 1;
@@ -26,6 +27,7 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 SELECT a FROM t1 ORDER BY a LIMIT 3;
@@ -41,6 +43,7 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 SELECT a FROM t1 ORDER BY a DESC LIMIT 3;
@@ -56,5 +59,6 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	2
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 DROP TABLE t1;
diff --git a/mysql-test/r/insert_select.result b/mysql-test/r/insert_select.result
index 538d6ddd0fd..04754375103 100644
--- a/mysql-test/r/insert_select.result
+++ b/mysql-test/r/insert_select.result
@@ -698,6 +698,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	1
 DROP TABLE t1;
 CREATE TABLE t1 (
diff --git a/mysql-test/r/join.result b/mysql-test/r/join.result
index d8230826048..d826fbe2aa7 100644
--- a/mysql-test/r/join.result
+++ b/mysql-test/r/join.result
@@ -861,6 +861,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	5
 drop table t1, t2, t3;
 create table t1 (a int);
@@ -1271,6 +1272,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	1
 DROP TABLE t1, t2;
 End of 5.1 tests
diff --git a/mysql-test/r/join_cache.result b/mysql-test/r/join_cache.result
index 07ceb573f85..19de0fb0a5a 100644
--- a/mysql-test/r/join_cache.result
+++ b/mysql-test/r/join_cache.result
@@ -5392,4 +5392,184 @@ x	5	5	4
 SET join_cache_level = DEFAULT;
 SET optimizer_switch=@tmp_optimizer_switch;
 DROP TABLE t1,t2,t3,t4;
+#
+# Bug#53305 Duplicate weedout + join buffer (join cache --level=7,8)
+#
+create table t1 (uid int, fid int, index(uid));
+insert into t1 values
+(1,1), (1,2), (1,3), (1,4),
+(2,5), (2,6), (2,7), (2,8),
+(3,1), (3,2), (3,9);
+create table t2 (uid int primary key, name varchar(128), index(name));
+insert into t2 values 
+(1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"),
+(6, "F"), (7, "G"), (8, "H"), (9, "I");
+create table t3 (uid int, fid int, index(uid));
+insert into t3 values
+(1,1), (1,2), (1,3),(1,4),
+(2,5), (2,6), (2,7), (2,8),
+(3,1), (3,2), (3,9);
+set @tmp_optimizer_switch=@@optimizer_switch;
+set  @@optimizer_switch='semijoin=on';
+set optimizer_switch='materialization=off';
+set optimizer_switch='loosescan=off,firstmatch=off';
+set optimizer_switch='mrr_sort_keys=off';
+set join_cache_level=7;
+create table t4 (uid int primary key, name varchar(128), index(name));
+insert into t4 values 
+(1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"),
+(6, "F"), (7, "G"), (8, "H"), (9, "I");
+explain select name from t2, t1 
+where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid)
+and t2.uid=t1.fid;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t3	ref	uid	uid	5	const	4	Using where; Start temporary
+1	PRIMARY	t4	eq_ref	PRIMARY	PRIMARY	4	test.t3.fid	1	Using index
+1	PRIMARY	t1	ALL	uid	NULL	NULL	NULL	11	Using where; End temporary; Using join buffer (flat, BNL join)
+1	PRIMARY	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.fid	1	Using join buffer (flat, BKAH join); Rowid-ordered scan
+select name from t2, t1 
+where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid)
+and t2.uid=t1.fid;
+name
+A
+A
+B
+B
+C
+D
+E
+F
+G
+H
+I
+set join_cache_level = default;
+set optimizer_switch=@tmp_optimizer_switch;
+drop table t1,t2,t3,t4;
+#
+# Bug#50358 - semijoin execution of subquery with outerjoin
+#             emplying join buffer
+#
+CREATE TABLE t1 (i int);
+CREATE TABLE t2 (i int);
+CREATE TABLE t3 (i int);
+INSERT INTO t1 VALUES (1), (2);
+INSERT INTO t2 VALUES (6);
+INSERT INTO t3 VALUES (1), (2);
+set @tmp_optimizer_switch=@@optimizer_switch;
+set  @@optimizer_switch='semijoin=on';
+set optimizer_switch='materialization=on';
+set join_cache_level=0;
+EXPLAIN
+SELECT * FROM t1 WHERE t1.i IN 
+(SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	2	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	1	Using where
+SELECT * FROM t1 WHERE t1.i IN 
+(SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+i
+1
+2
+set join_cache_level=2;
+EXPLAIN
+SELECT * FROM t1 WHERE t1.i IN 
+(SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	2	
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
+2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (flat, BNL join)
+SELECT * FROM t1 WHERE t1.i IN 
+(SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+i
+1
+2
+set join_cache_level = default;
+set optimizer_switch=@tmp_optimizer_switch;
+DROP TABLE t1,t2,t3;
+#
+# Bug #12546542: missing row with semijoin=off + join cache
+# (LP bug #922971)
+#
+CREATE TABLE t1 (a varchar(1024));
+INSERT INTO t1 VALUES ('v'), ('we');
+CREATE TABLE t2 (
+a varchar(1024) CHARACTER SET utf8 DEFAULT NULL, b int, c int
+);
+INSERT INTO t2 VALUES ('we',4,NULL), ('v',1305673728,6);
+CREATE TABLE t3 (b int, c int);
+INSERT INTO t3 VALUES (4,4);
+set @tmp_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off';
+set optimizer_switch='materialization=off';
+set join_cache_level=0;
+EXPLAIN
+SELECT * FROM t1
+WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b 
+WHERE t2.c < 10 OR t3.c > 1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	1	Using where
+SELECT * FROM t1
+WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b 
+WHERE t2.c < 10 OR t3.c > 1);
+a
+v
+we
+set join_cache_level=2;
+EXPLAIN
+SELECT * FROM t1
+WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b
+WHERE t2.c < 10 OR t3.c > 1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (flat, BNL join)
+SELECT * FROM t1
+WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b
+WHERE t2.c < 10 OR t3.c > 1);
+a
+v
+we
+set join_cache_level = default;
+set optimizer_switch=@tmp_optimizer_switch;
+DROP TABLE t1,t2,t3;
+#
+# Bug #925985: LEFT JOIN with optimize_join_buffer_size=off +
+#              join_buffer_size > join_buffer_space_limit
+#
+CREATE TABLE t1 (a int);
+INSERT INTO t1 VALUES (5), (3);
+CREATE TABLE t2 (a int, b int);
+INSERT INTO t2 VALUES
+(3,30), (1,10), (7,70), (2,20),
+(3,31), (1,11), (7,71), (2,21),
+(3,32), (1,12), (7,72), (2,22);
+CREATE TABLE t3 (b int, c int);
+INSERT INTO t3 VALUES (32, 302), (42,400), (30,300);
+set @tmp_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='optimize_join_buffer_size=off';
+set join_buffer_space_limit=4096;
+set join_buffer_size=4096*2;
+set join_cache_level=2;
+set optimizer_switch='outer_join_with_cache=on';
+EXPLAIN
+SELECT * FROM t1, t2 LEFT JOIN t3 ON t2.b=t3.b WHERE t1.a=t2.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	12	Using where; Using join buffer (flat, BNL join)
+1	SIMPLE	t3	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (incremental, BNL join)
+SELECT * FROM t1, t2 LEFT JOIN t3 ON t2.b=t3.b WHERE t1.a=t2.a;
+a	a	b	b	c
+3	3	30	30	300
+3	3	31	NULL	NULL
+3	3	32	32	302
+set join_buffer_space_limit=default;
+set join_buffer_size=default;
+set join_cache_level=default;
+set optimizer_switch=@tmp_optimizer_switch;
+DROP TABLE t1,t2,t3;
 set @@optimizer_switch=@save_optimizer_switch;
diff --git a/mysql-test/r/join_outer.result b/mysql-test/r/join_outer.result
index 16913864f5d..842ac2e81cd 100644
--- a/mysql-test/r/join_outer.result
+++ b/mysql-test/r/join_outer.result
@@ -1245,6 +1245,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	6
 DROP TABLE t1,t2;
 CREATE TABLE t1 (c int  PRIMARY KEY, e int NOT NULL);
@@ -1747,6 +1748,7 @@ Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	1048581
 flush status;
 select sum(t3.b) from t2 left join t3 on t3.a=t2.a and t2.a <> 10;
@@ -1760,6 +1762,7 @@ Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	1048581
 drop table t1,t2,t3;
 #
diff --git a/mysql-test/r/join_outer_innodb.result b/mysql-test/r/join_outer_innodb.result
index 749cb2ab212..5a99cb83b90 100644
--- a/mysql-test/r/join_outer_innodb.result
+++ b/mysql-test/r/join_outer_innodb.result
@@ -52,3 +52,11 @@ pk
 
 DROP TABLE t1,t2;
 # End BUG#58456
+CREATE TABLE t1(a int, b int, KEY (a), PRIMARY KEY (b))  ENGINE=InnoDB;
+CREATE TABLE t2 (b int, PRIMARY KEY (b));
+INSERT INTO t2 VALUES (4),(9);
+SELECT STRAIGHT_JOIN t1.a FROM t1 RIGHT JOIN t2 ON t1.b = t2.b
+WHERE (t1.b NOT BETWEEN 1 AND 7 OR t1.a IS NULL AND t1.b = t2.b) AND t2.b = 4
+GROUP BY 1;
+a
+DROP TABLE t1,t2;
diff --git a/mysql-test/r/join_outer_jcl6.result b/mysql-test/r/join_outer_jcl6.result
index 7605af40a6f..046c758a751 100644
--- a/mysql-test/r/join_outer_jcl6.result
+++ b/mysql-test/r/join_outer_jcl6.result
@@ -1256,6 +1256,7 @@ Handler_read_last	0
 Handler_read_next	9
 Handler_read_prev	0
 Handler_read_rnd	3
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	6
 DROP TABLE t1,t2;
 CREATE TABLE t1 (c int  PRIMARY KEY, e int NOT NULL);
@@ -1758,6 +1759,7 @@ Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	1048581
 flush status;
 select sum(t3.b) from t2 left join t3 on t3.a=t2.a and t2.a <> 10;
@@ -1771,6 +1773,7 @@ Handler_read_last	0
 Handler_read_next	5
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	1048581
 drop table t1,t2,t3;
 #
diff --git a/mysql-test/r/key_cache.result b/mysql-test/r/key_cache.result
index a1feb3ad40d..ab07b7b1f5d 100644
--- a/mysql-test/r/key_cache.result
+++ b/mysql-test/r/key_cache.result
@@ -817,3 +817,19 @@ set global keycache1.key_buffer_size=0;
 set global keycache2.key_buffer_size=0;
 set global key_buffer_size=@save_key_buffer_size;
 set global key_cache_segments=@save_key_cache_segments;
+#
+# Bug#12361113: crash when load index into cache
+#
+# Note that this creates an empty disabled key cache!
+SET GLOBAL key_cache_none.key_cache_block_size = 1024;
+CREATE TABLE t1 (a INT, b INTEGER NOT NULL, KEY (b) ) ENGINE = MYISAM;
+INSERT INTO t1 VALUES (1, 1);
+CACHE INDEX t1 in key_cache_none;
+ERROR HY000: Unknown key cache 'key_cache_none'
+# The bug crashed the server at LOAD INDEX below. Now it will succeed 
+# since the default cache is used due to CACHE INDEX failed for
+# key_cache_none.
+LOAD INDEX INTO CACHE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	preload_keys	status	OK
+DROP TABLE t1;
diff --git a/mysql-test/r/myisam_mrr.result b/mysql-test/r/myisam_mrr.result
index 9dd3602bab7..01d3e6aeb5d 100644
--- a/mysql-test/r/myisam_mrr.result
+++ b/mysql-test/r/myisam_mrr.result
@@ -557,4 +557,66 @@ COUNT(alias2.f2)
 set @@join_cache_level= @tmp_730133_jcl;
 set @@optimizer_switch= @tmp_730133_os;
 drop table t1;
+#
+# Test of MRR handler counters
+#
+flush status;
+show status like 'Handler_mrr%';
+Variable_name	Value
+create table t0 (a int);
+insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+create table t1 (a int, b int, filler char(200), key(a));
+insert into t1 
+select A.a+10*B.a+100*C.a+1000*D.a, 123,'filler' from t0 A, t0 B, t0 C, t0 D;
+explain select sum(b) from t1 where a < 10;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	a	a	5	NULL	8	Using index condition; Rowid-ordered scan
+# This should show one MRR scan and no re-fills:
+flush status;
+select sum(b) from t1 where a < 10;
+sum(b)
+1230
+show status like 'handler_mrr%';
+Variable_name	Value
+set @mrr_buffer_size_save= @@mrr_buffer_size;
+set mrr_buffer_size=128;
+explain select sum(b) from t1 where a < 1600;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	a	a	5	NULL	1380	Using index condition; Rowid-ordered scan
+# This should show one MRR scan and one extra rowid sort:
+flush status;
+select sum(b) from t1 where a < 1600;
+sum(b)
+196800
+show status like 'handler_mrr%';
+Variable_name	Value
+set @@mrr_buffer_size= @mrr_buffer_size_save;
+#Now, let's check BKA: 
+set @join_cache_level_save= @@join_cache_level;
+set @join_buffer_size_save= @@join_buffer_size;
+set join_cache_level=6;
+explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	Using where
+1	SIMPLE	t1	ref	a	a	5	test.t0.a	1	Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
+flush status;
+select sum(t1.b) from t0,t1 where t0.a=t1.a;
+sum(t1.b)
+1230
+show status like 'handler_mrr%';
+Variable_name	Value
+set join_buffer_size=10;
+explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t0	ALL	NULL	NULL	NULL	NULL	10	Using where
+1	SIMPLE	t1	ref	a	a	5	test.t0.a	1	Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
+flush status;
+select sum(t1.b) from t0,t1 where t0.a=t1.a;
+sum(t1.b)
+1230
+show status like 'handler_mrr%';
+Variable_name	Value
+set join_cache_level= @join_cache_level_save;
+set join_buffer_size= @join_buffer_size_save;
+drop table t0, t1;
 set optimizer_switch= @myisam_mrr_tmp;
diff --git a/mysql-test/r/mysqlcheck.result b/mysql-test/r/mysqlcheck.result
index ca9d3a20404..ab707ceef80 100644
--- a/mysql-test/r/mysqlcheck.result
+++ b/mysql-test/r/mysqlcheck.result
@@ -191,6 +191,7 @@ CREATE TABLE `я` (a INT) engine=myisam;
 SET NAMES DEFAULT;
 call mtr.add_suppression("@003f.frm' \\(errno: 22\\)");
 mysqlcheck --default-character-set="latin1" --databases test
+call mtr.add_suppression("Can't find file: '..test.@003f.frm'");
 test.?
 Error    : Table doesn't exist
 status   : Operation failed
diff --git a/mysql-test/r/mysqldump.result b/mysql-test/r/mysqldump.result
index 022523d4749..3db422657e3 100644
--- a/mysql-test/r/mysqldump.result
+++ b/mysql-test/r/mysqldump.result
@@ -4770,79 +4770,11 @@ INSERT INTO b12809202_db.t2 VALUES (1), (2), (3);
 -- Retrieving table structure for table t1...
 -- Sending SELECT query...
 -- Retrieving rows...
---
--- Host: localhost    Database: b12809202_db
--- ------------------------------------------------------
-
-/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
-/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
-/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
-/*!40101 SET NAMES utf8 */;
-/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
-/*!40103 SET TIME_ZONE='+00:00' */;
-/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
-/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
-/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
-/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
-
---
--- Table structure for table `t1`
---
-
-DROP TABLE IF EXISTS `t1`;
-/*!40101 SET @saved_cs_client     = @@character_set_client */;
-/*!40101 SET character_set_client = utf8 */;
-CREATE TABLE `t1` (
-  `c1` int(11) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1;
-/*!40101 SET character_set_client = @saved_cs_client */;
-
---
--- Dumping data for table `t1`
---
-
-LOCK TABLES `t1` WRITE;
-/*!40000 ALTER TABLE `t1` DISABLE KEYS */;
-INSERT INTO `t1` VALUES (1),(2),(3);
 -- Retrieving table structure for table t2...
 -- Sending SELECT query...
 -- Retrieving rows...
-/*!40000 ALTER TABLE `t1` ENABLE KEYS */;
-UNLOCK TABLES;
-
---
--- Table structure for table `t2`
---
-
-DROP TABLE IF EXISTS `t2`;
-/*!40101 SET @saved_cs_client     = @@character_set_client */;
-/*!40101 SET character_set_client = utf8 */;
-CREATE TABLE `t2` (
-  `c1` int(11) DEFAULT NULL
-) ENGINE=MyISAM DEFAULT CHARSET=latin1;
-/*!40101 SET character_set_client = @saved_cs_client */;
-
---
--- Dumping data for table `t2`
---
-
-LOCK TABLES `t2` WRITE;
-/*!40000 ALTER TABLE `t2` DISABLE KEYS */;
-INSERT INTO `t2` VALUES (1),(2),(3);
-/*!40000 ALTER TABLE `t2` ENABLE KEYS */;
-UNLOCK TABLES;
 -- Disconnecting from localhost...
-/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
 
-/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
-/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
-/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
-/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
-/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
-/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
-/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
-
--- Dump completed
 #### Dump ends here ####
 DROP TABLE b12809202_db.t1;
 DROP TABLE b12809202_db.t2;
diff --git a/mysql-test/r/null_key.result b/mysql-test/r/null_key.result
index 4e28f73caad..35c6ebe1442 100644
--- a/mysql-test/r/null_key.result
+++ b/mysql-test/r/null_key.result
@@ -428,6 +428,7 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	5
 DROP TABLE t1,t2,t3,t4;
 CREATE TABLE t1 (
diff --git a/mysql-test/r/order_by.result b/mysql-test/r/order_by.result
index 270e74ddf52..d320b5b669f 100644
--- a/mysql-test/r/order_by.result
+++ b/mysql-test/r/order_by.result
@@ -1759,3 +1759,57 @@ i1	i2
 4	4
 5	5
 DROP TABLE t1, t2, t3;
+#
+# Fix of LP BUG#793589 Wrong result with double ORDER BY
+#
+CREATE TABLE t1 ( b int) ;
+INSERT INTO t1 VALUES (8),(9);
+CREATE TABLE t2 ( a int, b int, PRIMARY KEY (a)) ;
+INSERT INTO t2 VALUES (6,7),(7,7),(8,1),(9,7),(10,1),(11,5),(12,2),(13,0),(14,1),(15,8),(16,1),(17,1),(18,9),(19,1),(20,5);
+SELECT t2.b AS field1 FROM t1, t2 WHERE t1.b = t2.a GROUP BY field1 ORDER BY t1.b, field1;
+field1
+1
+7
+SELECT t2.b, t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b, t2.b;
+b	b
+1	8
+7	9
+SELECT t2.b,t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+b	b
+1	8
+7	9
+SELECT t2.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+b
+1
+7
+# field1 removed from ORDER BY
+explain extended
+SELECT t2.b AS field1 FROM t1, t2 WHERE t1.b = t2.a GROUP BY field1 ORDER BY t1.b, field1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using temporary; Using filesort
+1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	100.00	
+Warnings:
+Note	1003	select `test`.`t2`.`b` AS `field1` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`b`) group by `test`.`t2`.`b` order by `test`.`t1`.`b`
+explain extended
+SELECT t2.b, t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b, t2.b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using temporary; Using filesort
+1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	100.00	
+Warnings:
+Note	1003	select `test`.`t2`.`b` AS `b`,`test`.`t1`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`b`) group by `test`.`t2`.`b` order by `test`.`t1`.`b`
+explain extended
+SELECT t2.b,t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using temporary; Using filesort
+1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	100.00	
+Warnings:
+Note	1003	select `test`.`t2`.`b` AS `b`,`test`.`t1`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`b`) group by `test`.`t2`.`b` order by `test`.`t1`.`b`
+explain extended
+SELECT t2.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where; Using temporary; Using filesort
+1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.b	1	100.00	
+Warnings:
+Note	1003	select `test`.`t2`.`b` AS `b` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`a` = `test`.`t1`.`b`) group by `test`.`t2`.`b` order by `test`.`t1`.`b`
+drop table t1,t2;
+End of 5.2 tests
diff --git a/mysql-test/r/partition.result b/mysql-test/r/partition.result
index 2e90bf8e27b..7c38fa18faa 100644
--- a/mysql-test/r/partition.result
+++ b/mysql-test/r/partition.result
@@ -521,6 +521,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 EXPLAIN PARTITIONS SELECT c1 FROM t2 WHERE (c1 > 10 AND c1 < 13) OR (c1 > 17 AND c1 < 20);
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
@@ -540,6 +541,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 DROP TABLE t1,t2;
 CREATE TABLE `t1` (
@@ -571,6 +573,7 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 EXPLAIN PARTITIONS SELECT c1 FROM t2 WHERE (c1 > 2 AND c1 < 5);
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
@@ -588,6 +591,7 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 EXPLAIN PARTITIONS SELECT c1 FROM t1 WHERE (c1 > 12 AND c1 < 15);
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
@@ -605,6 +609,7 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 EXPLAIN PARTITIONS SELECT c1 FROM t2 WHERE (c1 > 12 AND c1 < 15);
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
@@ -622,6 +627,7 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 DROP TABLE t1,t2;
 create table t1 (a int) partition by list ((a/3)*10 div 1)
diff --git a/mysql-test/r/partition_key_cache.result b/mysql-test/r/partition_key_cache.result
index 653d2f29d54..f1b174ca249 100644
--- a/mysql-test/r/partition_key_cache.result
+++ b/mysql-test/r/partition_key_cache.result
@@ -397,6 +397,33 @@ test.t1	assign_to_keycache	error	Subpartition sp0 returned error
 test.t1	assign_to_keycache	Error	Key 'inx_b' doesn't exist in table 't1'
 test.t1	assign_to_keycache	status	Operation failed
 DROP TABLE t1,t2;
+#
+# Bug#12361113: crash when load index into cache
+#
+# Note that this creates an empty disabled key cache!
+SET GLOBAL key_cache_none.key_cache_block_size = 1024;
+CREATE TABLE t1 (a INT, b INTEGER NOT NULL, KEY (b) )
+ENGINE = MYISAM
+PARTITION BY HASH(a) PARTITIONS 2;
+INSERT INTO t1 VALUES (1, 1);
+CACHE INDEX t1 IN key_cache_none;
+ERROR HY000: Unknown key cache 'key_cache_none'
+CACHE INDEX t1 PARTITION (p0) IN key_cache_none;
+ERROR HY000: Unknown key cache 'key_cache_none'
+CACHE INDEX t1 PARTITION (p1) IN key_cache_none;
+ERROR HY000: Unknown key cache 'key_cache_none'
+CACHE INDEX t1 PARTITION (p0) KEY (`b`) IN key_cache_none;
+ERROR HY000: Unknown key cache 'key_cache_none'
+CACHE INDEX t1 PARTITION (p1) KEY (`b`) IN key_cache_none;
+ERROR HY000: Unknown key cache 'key_cache_none'
+# The bug crashed the server at LOAD INDEX below. Now it will succeed
+# since the default cache is used due to CACHE INDEX failed for
+# key_cache_none.
+LOAD INDEX INTO CACHE t1;
+Table	Op	Msg_type	Msg_text
+test.t1	preload_keys	status	OK
+DROP TABLE t1;
+# Clean up
 SET GLOBAL hot_cache.key_buffer_size = 0;
 SET GLOBAL warm_cache.key_buffer_size = 0;
 SET @@global.cold_cache.key_buffer_size = 0;
diff --git a/mysql-test/r/partition_pruning.result b/mysql-test/r/partition_pruning.result
index eb0849e2cad..32c0cd34942 100644
--- a/mysql-test/r/partition_pruning.result
+++ b/mysql-test/r/partition_pruning.result
@@ -2968,7 +2968,10 @@ flush status;
 delete from t2 where b > 5;
 show status like 'Handler_read_rnd_next';
 Variable_name	Value
-Handler_read_rnd_next	1215
+Handler_read_rnd_next	815
+show status like 'Handler_read_rnd_deleted';
+Variable_name	Value
+Handler_read_rnd_deleted	400
 show status like 'Handler_read_key';
 Variable_name	Value
 Handler_read_key	0
@@ -2982,7 +2985,10 @@ flush status;
 delete from t2 where b < 5 or b > 3;
 show status like 'Handler_read_rnd_next';
 Variable_name	Value
-Handler_read_rnd_next	1215
+Handler_read_rnd_next	515
+show status like 'Handler_read_rnd_deleted';
+Variable_name	Value
+Handler_read_rnd_deleted	700
 show status like 'Handler_read_key';
 Variable_name	Value
 Handler_read_key	0
diff --git a/mysql-test/r/ps.result b/mysql-test/r/ps.result
index 7d793f16c1a..b4a09091aa6 100644
--- a/mysql-test/r/ps.result
+++ b/mysql-test/r/ps.result
@@ -3790,6 +3790,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 execute st;
@@ -3803,6 +3804,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 select * from t1 use index() where a=3;
@@ -3816,6 +3818,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	8
 flush status;
 execute st;
@@ -3829,6 +3832,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 deallocate prepare st;
 drop table t1;
diff --git a/mysql-test/r/ps_11bugs.result b/mysql-test/r/ps_11bugs.result
index f9f0525646d..56894302505 100644
--- a/mysql-test/r/ps_11bugs.result
+++ b/mysql-test/r/ps_11bugs.result
@@ -121,8 +121,8 @@ insert into t1 values (1);
 explain select * from t1 where 3 in (select (1+1) union select 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
-3	DEPENDENT UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
 select * from t1 where 3 in (select (1+1) union select 1);
 a
diff --git a/mysql-test/r/select.result b/mysql-test/r/select.result
index 7f035ca749a..d2e3594dfc6 100644
--- a/mysql-test/r/select.result
+++ b/mysql-test/r/select.result
@@ -2783,10 +2783,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
 explain select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	index	key1	key1	5	NULL	4	Using where; Using index
 explain select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	range	key1	key1	5	NULL	3	Using where; Using index
 select max(key1) from t1 where key1 <= 0.6158;
 max(key1)
 0.6158000230789185
@@ -2805,10 +2805,10 @@ max(key1)	min(key2)
 0.6158000230789185	1.3761999607086182
 select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 max(key1)
-0.6158000230789185
+0.38449999690055847
 select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 min(key1)
-0.37619999051094055
+0.38449999690055847
 DROP TABLE t1,t2;
 CREATE TABLE t1 (i BIGINT UNSIGNED NOT NULL);
 INSERT INTO t1 VALUES (10);
@@ -4346,6 +4346,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	6
 DROP TABLE t1, t2;
 CREATE TABLE t1 (f1 bigint(20) NOT NULL default '0',
diff --git a/mysql-test/r/select_jcl6.result b/mysql-test/r/select_jcl6.result
index 54eed1ebaae..f5aa02fe94c 100644
--- a/mysql-test/r/select_jcl6.result
+++ b/mysql-test/r/select_jcl6.result
@@ -2794,10 +2794,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
 explain select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	index	key1	key1	5	NULL	4	Using where; Using index
 explain select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	range	key1	key1	5	NULL	3	Using where; Using index
 select max(key1) from t1 where key1 <= 0.6158;
 max(key1)
 0.6158000230789185
@@ -2816,10 +2816,10 @@ max(key1)	min(key2)
 0.6158000230789185	1.3761999607086182
 select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 max(key1)
-0.6158000230789185
+0.38449999690055847
 select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 min(key1)
-0.37619999051094055
+0.38449999690055847
 DROP TABLE t1,t2;
 CREATE TABLE t1 (i BIGINT UNSIGNED NOT NULL);
 INSERT INTO t1 VALUES (10);
@@ -4357,7 +4357,8 @@ Handler_read_last	0
 Handler_read_next	10
 Handler_read_prev	0
 Handler_read_rnd	10
-Handler_read_rnd_next	7
+Handler_read_rnd_deleted	1
+Handler_read_rnd_next	6
 DROP TABLE t1, t2;
 CREATE TABLE t1 (f1 bigint(20) NOT NULL default '0',
 f2 int(11) NOT NULL default '0',
diff --git a/mysql-test/r/select_pkeycache.result b/mysql-test/r/select_pkeycache.result
index 7f035ca749a..d2e3594dfc6 100644
--- a/mysql-test/r/select_pkeycache.result
+++ b/mysql-test/r/select_pkeycache.result
@@ -2783,10 +2783,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
 explain select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	index	key1	key1	5	NULL	4	Using where; Using index
 explain select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	range	key1	key1	5	NULL	3	Using where; Using index
 select max(key1) from t1 where key1 <= 0.6158;
 max(key1)
 0.6158000230789185
@@ -2805,10 +2805,10 @@ max(key1)	min(key2)
 0.6158000230789185	1.3761999607086182
 select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 max(key1)
-0.6158000230789185
+0.38449999690055847
 select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 min(key1)
-0.37619999051094055
+0.38449999690055847
 DROP TABLE t1,t2;
 CREATE TABLE t1 (i BIGINT UNSIGNED NOT NULL);
 INSERT INTO t1 VALUES (10);
@@ -4346,6 +4346,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	6
 DROP TABLE t1, t2;
 CREATE TABLE t1 (f1 bigint(20) NOT NULL default '0',
diff --git a/mysql-test/r/single_delete_update.result b/mysql-test/r/single_delete_update.result
index 72419c6ec9d..d4534a2c2d8 100644
--- a/mysql-test/r/single_delete_update.result
+++ b/mysql-test/r/single_delete_update.result
@@ -29,6 +29,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 DELETE FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5;
@@ -46,6 +47,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i;
 a	i
@@ -80,6 +82,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 DELETE FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5;
@@ -97,6 +100,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i;
 a	i
@@ -128,6 +132,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -145,6 +150,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 ## should be 5 (previous LIMIT)
 SELECT 1 - COUNT(*) FROM t2 WHERE b = 10;
@@ -180,6 +186,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -197,6 +204,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 ## should be 5 (previous LIMIT)
 SELECT 257 - COUNT(*) FROM t2 WHERE b = 10;
@@ -226,6 +234,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -243,6 +252,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 WHERE b = 10 ORDER BY a, c;
 a	b	c	d
@@ -270,6 +280,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 DELETE FROM t2 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -287,6 +298,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 WHERE b = 10 ORDER BY a, c;
 a	b	c	d
@@ -317,6 +329,7 @@ Handler_read_last	0
 Handler_read_next	7
 Handler_read_prev	0
 Handler_read_rnd	4
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 EXPLAIN EXTENDED SELECT * FROM t2 WHERE key1 < 13 or key2 < 14 ORDER BY key1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
@@ -339,6 +352,7 @@ Handler_read_last	0
 Handler_read_next	7
 Handler_read_prev	0
 Handler_read_rnd	8
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE key1 < 13 or key2 < 14 ORDER BY key1;
 i	key1	key2
@@ -375,6 +389,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 DELETE FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i DESC LIMIT 5;
@@ -392,6 +407,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i;
 a	i
@@ -426,6 +442,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 DELETE FROM t2 ORDER BY a, b DESC LIMIT 5;
@@ -443,6 +460,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 ORDER BY a, b DESC;
 a	b	c
@@ -486,6 +504,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 SELECT * FROM t2 ORDER BY a DESC, b DESC LIMIT 5;
@@ -509,6 +528,7 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 DELETE FROM t2 ORDER BY a DESC, b DESC LIMIT 5;
@@ -526,6 +546,7 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE c = 10 ORDER BY a DESC, b DESC;
 a	b	c
@@ -561,6 +582,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 UPDATE t2 SET a = 10 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5;
@@ -578,6 +600,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i;
 a	i
@@ -617,6 +640,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 UPDATE t2 SET a = 10 WHERE i > 10 AND i <= 18 ORDER BY i LIMIT 5;
@@ -634,6 +658,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i;
 a	i
@@ -670,6 +695,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -687,6 +713,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 ## should be 5 (previous LIMIT)
 SELECT COUNT(*) FROM t2 WHERE b = 10 AND d = 10 ORDER BY a, c;
@@ -722,6 +749,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -739,6 +767,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 ## should be 5 (previous LIMIT)
 SELECT COUNT(*) FROM t2 WHERE b = 10 AND d = 10 ORDER BY a, c;
@@ -768,6 +797,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -785,6 +815,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 WHERE b = 10 ORDER BY a, c;
 a	b	c	d
@@ -813,6 +844,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 UPDATE t2 SET d = 10 WHERE b = 10 ORDER BY a, c LIMIT 5;
@@ -830,6 +862,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 WHERE b = 10 ORDER BY a, c;
 a	b	c	d
@@ -861,6 +894,7 @@ Handler_read_last	0
 Handler_read_next	7
 Handler_read_prev	0
 Handler_read_rnd	4
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 EXPLAIN EXTENDED SELECT * FROM t2 WHERE key1 < 13 or key2 < 14 ORDER BY key1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
@@ -883,6 +917,7 @@ Handler_read_last	0
 Handler_read_next	7
 Handler_read_prev	0
 Handler_read_rnd	8
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE key1 < 13 or key2 < 14 ORDER BY key1;
 i	key1	key2
@@ -923,6 +958,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 UPDATE t2 SET a = 10 WHERE i > 10 AND i <= 18 ORDER BY i DESC LIMIT 5;
@@ -940,6 +976,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE i > 10 AND i <= 18 ORDER BY i;
 a	i
@@ -979,6 +1016,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 FLUSH STATUS;
 UPDATE t2 SET c = 10 ORDER BY a, b DESC LIMIT 5;
@@ -996,6 +1034,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 SELECT * FROM t2 WHERE c = 10 ORDER BY a, b DESC;
 a	b	c
@@ -1033,6 +1072,7 @@ Handler_read_last	0
 Handler_read_next	4
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 SELECT * FROM t2 ORDER BY a DESC, b DESC LIMIT 5;
@@ -1056,6 +1096,7 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 FLUSH STATUS;
 UPDATE t2 SET c = 10 ORDER BY a DESC, b DESC LIMIT 5;
@@ -1073,6 +1114,7 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	4
 Handler_read_rnd	5
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT * FROM t2 WHERE c = 10 ORDER BY a DESC, b DESC;
 a	b	c
diff --git a/mysql-test/r/status.result b/mysql-test/r/status.result
index 91a120313ae..0182ffac880 100644
--- a/mysql-test/r/status.result
+++ b/mysql-test/r/status.result
@@ -282,6 +282,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	7
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	23
 Handler_rollback	0
 Handler_savepoint	0
@@ -297,7 +298,35 @@ Created_tmp_files	0
 Created_tmp_tables	2
 Handler_tmp_update	2
 Handler_tmp_write	7
-Rows_tmp_read	35
+Rows_tmp_read	36
+drop table t1;
+CREATE TABLE t1 (i int(11) DEFAULT NULL, KEY i (i) ) ENGINE=MyISAM;
+insert into t1 values (1),(2),(3),(4),(5);
+flush status;
+select * from t1 where i=5 union select * from t1 where i=5;
+i
+5
+show status like "handler%";
+Variable_name	Value
+Handler_commit	0
+Handler_delete	0
+Handler_discover	0
+Handler_prepare	0
+Handler_read_first	0
+Handler_read_key	2
+Handler_read_last	0
+Handler_read_next	2
+Handler_read_prev	0
+Handler_read_rnd	0
+Handler_read_rnd_deleted	1
+Handler_read_rnd_next	2
+Handler_rollback	0
+Handler_savepoint	0
+Handler_savepoint_rollback	0
+Handler_tmp_update	0
+Handler_tmp_write	2
+Handler_update	0
+Handler_write	0
 drop table t1;
 set @@global.concurrent_insert= @old_concurrent_insert;
 SET GLOBAL log_output = @old_log_output;
diff --git a/mysql-test/r/status_user.result b/mysql-test/r/status_user.result
index cd8e5af3004..96edd1c4207 100644
--- a/mysql-test/r/status_user.result
+++ b/mysql-test/r/status_user.result
@@ -107,6 +107,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	5
 Handler_rollback	2
 Handler_savepoint	0
diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result
index 7d3877e678d..e7883c5801e 100644
--- a/mysql-test/r/subselect.result
+++ b/mysql-test/r/subselect.result
@@ -4620,6 +4620,13 @@ CREATE TABLE t1(a1 int);
 INSERT INTO t1 VALUES (1),(2);
 SELECT @@session.sql_mode INTO @old_sql_mode;
 SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+EXPLAIN EXTENDED
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+Warnings:
+Note	1003	select 1 AS `1` from `test`.`t1` where <nop>(<in_optimizer>(1,((select max(`test`.`t1`.`a1`) from `test`.`t1`) > 1)))
 SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
 1
 1
@@ -5322,7 +5329,6 @@ EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
 WHERE t1.a = d1.a;
 ERROR 42S22: Unknown column 'd1.a' in 'where clause'
 DROP TABLE t1;
-End of 5.1 tests.
 Set up test tables.
 CREATE TABLE t1 (
 t1_id INT UNSIGNED,
@@ -5847,10 +5853,161 @@ NULL
 NULL
 5
 DROP TABLE t1, t2, t3;
+#
+# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
+#
+CREATE TABLE t1(a1 int);
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2(a1 int);
+INSERT INTO t2 VALUES (3);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
+1
+1
+1
+SET SESSION sql_mode=@old_sql_mode;
+DROP TABLE t1, t2;
+create table t2(i int);
+insert into t2 values(0);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+CREATE VIEW v1 AS  
+SELECT 'f' FROM t2 UNION SELECT 'x' FROM t2
+;
+CREATE TABLE t1 (
+pk int NOT NULL,
+col_varchar_key varchar(1) DEFAULT NULL,
+PRIMARY KEY (pk),
+KEY col_varchar_key (col_varchar_key)
+);
+SELECT t1.pk
+FROM t1
+WHERE t1.col_varchar_key < ALL ( SELECT * FROM v1 )
+;
+pk
+SET SESSION sql_mode=@old_sql_mode;
+drop table t2, t1;
+drop view v1;
+#
+# BUG#50257: Missing info in REF column of the EXPLAIN 
+#            lines for subselects
+#
+CREATE TABLE t1 (a INT, b INT, INDEX (a));
+INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
+EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	5	const	1	
+EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
+2	SUBQUERY	t1	ref	a	a	5	const	1	Using index
+DROP TABLE t1;
+#
+# BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+# (duplicate of LP bug #888456)
+#
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	table1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	table2	index	NULL	f1_key	4	NULL	10	Using where; Using index; Using join buffer (flat, BNL join)
+2	DEPENDENT SUBQUERY	t2	index	f1_key	f1_key	4	NULL	10	Using where; Using index
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+f1	f1_key
+v	j
+s	j
+v	v
+s	v
+v	c
+s	c
+v	m
+s	m
+v	d
+s	d
+v	d
+s	d
+v	y
+s	y
+v	t
+s	t
+v	d
+s	d
+v	s
+s	s
+DROP TABLE t1,t2;
+#
+# LP bug 919427: EXPLAIN for a query over a single-row table 
+#                with IN subquery in WHERE condition
+# 
+CREATE TABLE ot (
+col_int_nokey int(11), 
+col_varchar_nokey varchar(1)
+) ;
+INSERT INTO ot VALUES (1,'x');
+CREATE TABLE it1(
+col_int_key int(11), 
+col_varchar_key varchar(1), 
+KEY idx_cvk_cik (col_varchar_key,col_int_key)
+);
+INSERT INTO it1 VALUES (NULL,'x'), (NULL,'f');
+CREATE TABLE it2 (
+col_int_key int(11),
+col_varchar_key varchar(1),
+col_varchar_key2 varchar(1),
+KEY idx_cvk_cvk2_cik (col_varchar_key, col_varchar_key2, col_int_key),
+KEY idx_cvk_cik (col_varchar_key, col_int_key)
+);
+INSERT INTO it2 VALUES (NULL,'x','x'), (NULL,'f','f');
+EXPLAIN
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	5	func	1	
+2	MATERIALIZED	it1	ref	idx_cvk_cik	idx_cvk_cik	9	const,const	1	Using where; Using index
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+col_int_nokey
+1
+EXPLAIN
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	10	func,func	1	
+2	MATERIALIZED	it2	ref	idx_cvk_cvk2_cik,idx_cvk_cik	idx_cvk_cvk2_cik	8	const,const	1	Using where; Using index
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+col_int_nokey
+1
+DROP TABLE ot,it1,it2;
 End of 5.2 tests
 #
 # BUG#779885: Crash in eliminate_item_equal with materialization=on in
-# maria-5.3
 #
 CREATE TABLE t1 ( f1 int );
 INSERT INTO t1 VALUES (19), (20);
@@ -5897,32 +6054,6 @@ b	c
 9	NULL
 SET optimizer_switch=@save_optimizer_switch;
 drop table t1, t2, t3;
-End of 5.3 tests
-#
-# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
-#
-CREATE TABLE t1(a1 int);
-INSERT INTO t1 VALUES (1),(2);
-CREATE TABLE t2(a1 int);
-INSERT INTO t2 VALUES (3);
-SELECT @@session.sql_mode INTO @old_sql_mode;
-SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
-1
-1
-1
-SET SESSION sql_mode=@old_sql_mode;
-DROP TABLE t1, t2;
 #
 # BUG#50257: Missing info in REF column of the EXPLAIN 
 #            lines for subselects
@@ -5945,6 +6076,54 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 
 DROP TABLE t1;
 #
+# Bug#11764086: Null left operand to NOT IN in WHERE clause
+# behaves differently than real NULL
+#
+CREATE TABLE parent (id int);
+INSERT INTO parent VALUES (1), (2);
+CREATE TABLE child (parent_id int, other int);
+INSERT INTO child VALUES (1,NULL);
+# Offending query (c.parent_id is NULL for null-complemented rows only)
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id NOT IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+);
+id	parent_id
+1	1
+2	NULL
+# Some syntactic variations with IS FALSE and IS NOT TRUE
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS NOT TRUE;
+id	parent_id
+1	1
+2	NULL
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS FALSE;
+id	parent_id
+1	1
+2	NULL
+DROP TABLE parent, child;
+# End of test for bug#11764086.
+#
 # Bug 11765699 - 58690: !TABLE || (!TABLE->READ_SET || 
 #                BITMAP_IS_SET(TABLE->READ_SET, FIELD_INDEX
 #
@@ -6283,5 +6462,14 @@ SELECT ( SELECT b FROM t2 WHERE b = a OR rand() * 0) FROM t1;
 1
 NULL
 drop table t1,t2,t3;
+#
+# LP BUG#905353 Wrong non-empty result with a constant table,
+# aggregate function in subquery, MyISAM or Aria
+#
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+SELECT a FROM t1 WHERE ( SELECT MIN(a) = 100 );
+a
+drop table t1;
 # return optimizer switch changed in the beginning of this test
 set optimizer_switch=@subselect_tmp;
diff --git a/mysql-test/r/subselect3.result b/mysql-test/r/subselect3.result
index 833d6f203c2..d5d75b68628 100644
--- a/mysql-test/r/subselect3.result
+++ b/mysql-test/r/subselect3.result
@@ -125,6 +125,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	50
 select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z;
 Z
diff --git a/mysql-test/r/subselect3_jcl6.result b/mysql-test/r/subselect3_jcl6.result
index 5d7fee48d87..d794d35cf1a 100644
--- a/mysql-test/r/subselect3_jcl6.result
+++ b/mysql-test/r/subselect3_jcl6.result
@@ -135,6 +135,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	50
 select 'No key lookups, seq reads: 29= 5 reads from t2 + 4 * 6 reads from t1.' Z;
 Z
@@ -1153,7 +1154,7 @@ insert into t4 select a from t3;
 explain select * from t3 where a in (select t1.kp1 from t1,t4 where kp1<20
 and t4.pk=t1.c);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	t1	range	kp1	kp1	5	NULL	48	Using index condition; Using where; Rowid-ordered scan; LooseScan
+1	PRIMARY	t1	range	kp1	kp1	5	NULL	48	Using index condition; Using where; LooseScan
 1	PRIMARY	t4	eq_ref	PRIMARY	PRIMARY	4	test.t1.c	1	Using index; FirstMatch(t1)
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	100	Using where; Using join buffer (flat, BNL join)
 drop table t1, t3, t4;
diff --git a/mysql-test/r/subselect4.result b/mysql-test/r/subselect4.result
index 1fd638fd42c..14c4254028d 100644
--- a/mysql-test/r/subselect4.result
+++ b/mysql-test/r/subselect4.result
@@ -711,7 +711,7 @@ EXPLAIN
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2);
 f1	f2
 SET @@optimizer_switch = 'materialization=off,in_to_exists=on,semijoin=off';
@@ -802,7 +802,7 @@ EXPLAIN
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2);
 f1	f2
 INSERT INTO t1 VALUES (1, 2);
@@ -897,7 +897,7 @@ EXPLAIN
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10);
 f1	f2
 SET @@optimizer_switch = 'materialization=off,in_to_exists=on,semijoin=off';
@@ -988,7 +988,7 @@ EXPLAIN
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
 SELECT * FROM t1 WHERE (2, 0) NOT IN (SELECT min(f3)+f3, min(f4)+f3+max(f4) FROM t2 WHERE f3 > 10);
 f1	f2
 set @@optimizer_switch=@save_optimizer_switch;
diff --git a/mysql-test/r/subselect_cache.result b/mysql-test/r/subselect_cache.result
index d8ac44005f9..e38e8b42e9a 100644
--- a/mysql-test/r/subselect_cache.result
+++ b/mysql-test/r/subselect_cache.result
@@ -37,6 +37,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	31
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -64,6 +65,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	61
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (where)
@@ -90,6 +92,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	31
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -115,6 +118,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	61
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (having)
@@ -141,6 +145,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	31
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -166,6 +171,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	61
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (OUTER JOIN ON)
@@ -264,6 +270,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	442
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -361,6 +368,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	472
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (GROUP BY)
@@ -383,6 +391,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	4
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	36
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -404,6 +413,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	4
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	86
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (distinct GROUP BY)
@@ -426,6 +436,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	4
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	41
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -447,6 +458,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	4
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	91
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (ORDER BY)
@@ -475,6 +487,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	10
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	42
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -502,6 +515,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	10
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	72
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (distinct ORDER BY)
@@ -524,7 +538,8 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	4
-Handler_read_rnd_next	37
+Handler_read_rnd_deleted	1
+Handler_read_rnd_next	36
 set optimizer_switch='subquery_cache=off';
 flush status;
 select distinct a from t1 ORDER BY (select d from t2 where b=c);
@@ -545,7 +560,8 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	4
-Handler_read_rnd_next	67
+Handler_read_rnd_deleted	1
+Handler_read_rnd_next	66
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (LEFT JOIN ON)
 flush status;
@@ -643,6 +659,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	141
 set optimizer_switch='subquery_cache=off';
 flush status;
@@ -740,6 +757,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	671
 set optimizer_switch='subquery_cache=on';
 #single value subquery test (PS)
@@ -1364,6 +1382,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	145
 set optimizer_switch='subquery_cache=on';
 flush status;
@@ -1393,6 +1412,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	84
 #several subqueries (several levels)
 set optimizer_switch='subquery_cache=off';
@@ -1425,6 +1445,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	127
 set optimizer_switch='subquery_cache=on';
 flush status;
@@ -1454,6 +1475,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	69
 #clean up
 drop table t1,t2;
@@ -1644,6 +1666,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	8
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	57
 set optimizer_switch='subquery_cache=on';
 flush status;
@@ -1669,6 +1692,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	8
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	37
 argument of aggregate function as parameter of subquery (illegal use)
 set optimizer_switch='subquery_cache=off';
@@ -1695,6 +1719,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	8
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	57
 set optimizer_switch='subquery_cache=on';
 flush status;
@@ -1720,6 +1745,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	8
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	41
 drop table t1,t2;
 #test of flattening subquery optimisations and cache
@@ -1761,6 +1787,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	16
 alter table t2 drop primary key;
 set optimizer_switch='default,semijoin=off,materialization=off,subquery_cache=off';
@@ -1798,6 +1825,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	151
 set optimizer_switch='default,semijoin=off,materialization=off,subquery_cache=on';
 explain select * from t1 where a in (select pk from t2);
@@ -1834,6 +1862,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	43
 set optimizer_switch='default,semijoin=off,materialization=on,subquery_cache=on';
 explain select * from t1 where a in (select pk from t2);
@@ -1870,6 +1899,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	27
 drop table t0,t1,t2;
 set optimizer_switch='default';
diff --git a/mysql-test/r/subselect_mat.result b/mysql-test/r/subselect_mat.result
index 5c750e8b078..097e65fa94f 100644
--- a/mysql-test/r/subselect_mat.result
+++ b/mysql-test/r/subselect_mat.result
@@ -1793,7 +1793,7 @@ SELECT * FROM t1
 WHERE a IN ( SELECT MIN(a) FROM t1 );
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
 1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	100.00	
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
 Warnings:
 Note	1003	select 8 AS `a` from dual where <expr_cache><8>(<in_optimizer>(8,<exists>(select min(`test`.`t1`.`a`) from `test`.`t1` having (<cache>(8) = <ref_null_helper>(min(`test`.`t1`.`a`))))))
 DROP TABLE t1;
@@ -1811,6 +1811,43 @@ a	b	c
 4	4	2
 4	4	4
 DROP TABLE t1,t2;
+#
+# BUG#922254: Assertion `0' failed at item_cmpfunc.cc:5899: Item* Item_equal::get_first(JOIN_TAB*, Item*)
+#
+CREATE TABLE t1 ( a VARCHAR(3) );
+CREATE TABLE t2 ( b VARCHAR(3), c VARCHAR(8), KEY(c) );
+INSERT INTO t2 VALUES ('USA','Abilene'),('USA','Akron');
+EXPLAIN
+SELECT * FROM
+( SELECT * FROM t1 ) AS alias1,
+t2 AS alias2
+WHERE b = a AND a IN (
+SELECT alias3.c
+FROM t2 AS alias3, t2 AS alias4
+WHERE alias4.c = alias3.b
+);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+3	MATERIALIZED	alias3	ALL	NULL	NULL	NULL	NULL	2	
+3	MATERIALIZED	alias4	index	c	c	11	NULL	2	Using where; Using index; Using join buffer (flat, BNL join)
+DROP TABLE t1,t2;
+#
+# BUG#928048: Query containing IN subquery with OR in the where clause returns a wrong result
+#
+create table t1 (a int, b int);
+insert into t1 values (7,5), (3,3), (5,4), (9,3);
+create table t2 (a int, b int, index i_a(a));
+insert into t2 values
+(4,2), (7,9), (7,4), (3,1), (5,3), (3,1), (9,4), (8,1);
+explain select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	Using where
+2	MATERIALIZED	t2	ALL	i_a	NULL	NULL	NULL	8	Using where
+select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
+a	b
+7	5
+3	3
+drop table t1,t2;
 # This must be at the end:
 set optimizer_switch=@subselect_sj_mat_tmp;
 set join_cache_level=@save_join_cache_level;
diff --git a/mysql-test/r/subselect_no_mat.result b/mysql-test/r/subselect_no_mat.result
index 8ac856857eb..b515ea39f9e 100644
--- a/mysql-test/r/subselect_no_mat.result
+++ b/mysql-test/r/subselect_no_mat.result
@@ -4622,6 +4622,13 @@ CREATE TABLE t1(a1 int);
 INSERT INTO t1 VALUES (1),(2);
 SELECT @@session.sql_mode INTO @old_sql_mode;
 SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+EXPLAIN EXTENDED
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+Warnings:
+Note	1003	select 1 AS `1` from `test`.`t1` where <nop>(<in_optimizer>(1,((select max(`test`.`t1`.`a1`) from `test`.`t1`) > 1)))
 SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
 1
 1
@@ -5324,7 +5331,6 @@ EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
 WHERE t1.a = d1.a;
 ERROR 42S22: Unknown column 'd1.a' in 'where clause'
 DROP TABLE t1;
-End of 5.1 tests.
 Set up test tables.
 CREATE TABLE t1 (
 t1_id INT UNSIGNED,
@@ -5848,10 +5854,159 @@ NULL
 NULL
 5
 DROP TABLE t1, t2, t3;
+#
+# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
+#
+CREATE TABLE t1(a1 int);
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2(a1 int);
+INSERT INTO t2 VALUES (3);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
+1
+1
+1
+SET SESSION sql_mode=@old_sql_mode;
+DROP TABLE t1, t2;
+create table t2(i int);
+insert into t2 values(0);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+CREATE VIEW v1 AS  
+SELECT 'f' FROM t2 UNION SELECT 'x' FROM t2
+;
+CREATE TABLE t1 (
+pk int NOT NULL,
+col_varchar_key varchar(1) DEFAULT NULL,
+PRIMARY KEY (pk),
+KEY col_varchar_key (col_varchar_key)
+);
+SELECT t1.pk
+FROM t1
+WHERE t1.col_varchar_key < ALL ( SELECT * FROM v1 )
+;
+pk
+SET SESSION sql_mode=@old_sql_mode;
+drop table t2, t1;
+drop view v1;
+#
+# BUG#50257: Missing info in REF column of the EXPLAIN 
+#            lines for subselects
+#
+CREATE TABLE t1 (a INT, b INT, INDEX (a));
+INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
+EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	5	const	1	
+EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
+2	SUBQUERY	t1	ref	a	a	5	const	1	Using index
+DROP TABLE t1;
+#
+# BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+# (duplicate of LP bug #888456)
+#
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	table1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	table2	index	NULL	f1_key	4	NULL	10	Using where; Using index; Using join buffer (flat, BNL join)
+2	DEPENDENT SUBQUERY	t2	index	f1_key	f1_key	4	NULL	10	Using where; Using index
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+f1	f1_key
+v	j
+s	j
+v	v
+s	v
+v	c
+s	c
+v	m
+s	m
+v	d
+s	d
+v	d
+s	d
+v	y
+s	y
+v	t
+s	t
+v	d
+s	d
+v	s
+s	s
+DROP TABLE t1,t2;
+#
+# LP bug 919427: EXPLAIN for a query over a single-row table 
+#                with IN subquery in WHERE condition
+# 
+CREATE TABLE ot (
+col_int_nokey int(11), 
+col_varchar_nokey varchar(1)
+) ;
+INSERT INTO ot VALUES (1,'x');
+CREATE TABLE it1(
+col_int_key int(11), 
+col_varchar_key varchar(1), 
+KEY idx_cvk_cik (col_varchar_key,col_int_key)
+);
+INSERT INTO it1 VALUES (NULL,'x'), (NULL,'f');
+CREATE TABLE it2 (
+col_int_key int(11),
+col_varchar_key varchar(1),
+col_varchar_key2 varchar(1),
+KEY idx_cvk_cvk2_cik (col_varchar_key, col_varchar_key2, col_int_key),
+KEY idx_cvk_cik (col_varchar_key, col_int_key)
+);
+INSERT INTO it2 VALUES (NULL,'x','x'), (NULL,'f','f');
+EXPLAIN
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	it1	ref	idx_cvk_cik	idx_cvk_cik	9	const,const	1	Using where; Using index; FirstMatch(ot)
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+col_int_nokey
+1
+EXPLAIN
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	it2	ref	idx_cvk_cvk2_cik,idx_cvk_cik	idx_cvk_cvk2_cik	8	const,const	1	Using where; Using index; FirstMatch(ot)
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+col_int_nokey
+1
+DROP TABLE ot,it1,it2;
 End of 5.2 tests
 #
 # BUG#779885: Crash in eliminate_item_equal with materialization=on in
-# maria-5.3
 #
 CREATE TABLE t1 ( f1 int );
 INSERT INTO t1 VALUES (19), (20);
@@ -5898,32 +6053,6 @@ b	c
 9	NULL
 SET optimizer_switch=@save_optimizer_switch;
 drop table t1, t2, t3;
-End of 5.3 tests
-#
-# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
-#
-CREATE TABLE t1(a1 int);
-INSERT INTO t1 VALUES (1),(2);
-CREATE TABLE t2(a1 int);
-INSERT INTO t2 VALUES (3);
-SELECT @@session.sql_mode INTO @old_sql_mode;
-SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
-1
-1
-1
-SET SESSION sql_mode=@old_sql_mode;
-DROP TABLE t1, t2;
 #
 # BUG#50257: Missing info in REF column of the EXPLAIN 
 #            lines for subselects
@@ -5946,6 +6075,54 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 
 DROP TABLE t1;
 #
+# Bug#11764086: Null left operand to NOT IN in WHERE clause
+# behaves differently than real NULL
+#
+CREATE TABLE parent (id int);
+INSERT INTO parent VALUES (1), (2);
+CREATE TABLE child (parent_id int, other int);
+INSERT INTO child VALUES (1,NULL);
+# Offending query (c.parent_id is NULL for null-complemented rows only)
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id NOT IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+);
+id	parent_id
+1	1
+2	NULL
+# Some syntactic variations with IS FALSE and IS NOT TRUE
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS NOT TRUE;
+id	parent_id
+1	1
+2	NULL
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS FALSE;
+id	parent_id
+1	1
+2	NULL
+DROP TABLE parent, child;
+# End of test for bug#11764086.
+#
 # Bug 11765699 - 58690: !TABLE || (!TABLE->READ_SET || 
 #                BITMAP_IS_SET(TABLE->READ_SET, FIELD_INDEX
 #
@@ -6284,6 +6461,15 @@ SELECT ( SELECT b FROM t2 WHERE b = a OR rand() * 0) FROM t1;
 1
 NULL
 drop table t1,t2,t3;
+#
+# LP BUG#905353 Wrong non-empty result with a constant table,
+# aggregate function in subquery, MyISAM or Aria
+#
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+SELECT a FROM t1 WHERE ( SELECT MIN(a) = 100 );
+a
+drop table t1;
 # return optimizer switch changed in the beginning of this test
 set optimizer_switch=@subselect_tmp;
 set optimizer_switch=default;
diff --git a/mysql-test/r/subselect_no_opts.result b/mysql-test/r/subselect_no_opts.result
index 518f9366b80..c50ee1bac69 100644
--- a/mysql-test/r/subselect_no_opts.result
+++ b/mysql-test/r/subselect_no_opts.result
@@ -4618,6 +4618,13 @@ CREATE TABLE t1(a1 int);
 INSERT INTO t1 VALUES (1),(2);
 SELECT @@session.sql_mode INTO @old_sql_mode;
 SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+EXPLAIN EXTENDED
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+Warnings:
+Note	1003	select 1 AS `1` from `test`.`t1` where <nop>(<in_optimizer>(1,((select max(`test`.`t1`.`a1`) from `test`.`t1`) > 1)))
 SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
 1
 1
@@ -5320,7 +5327,6 @@ EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
 WHERE t1.a = d1.a;
 ERROR 42S22: Unknown column 'd1.a' in 'where clause'
 DROP TABLE t1;
-End of 5.1 tests.
 Set up test tables.
 CREATE TABLE t1 (
 t1_id INT UNSIGNED,
@@ -5844,10 +5850,159 @@ NULL
 NULL
 5
 DROP TABLE t1, t2, t3;
+#
+# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
+#
+CREATE TABLE t1(a1 int);
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2(a1 int);
+INSERT INTO t2 VALUES (3);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
+1
+1
+1
+SET SESSION sql_mode=@old_sql_mode;
+DROP TABLE t1, t2;
+create table t2(i int);
+insert into t2 values(0);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+CREATE VIEW v1 AS  
+SELECT 'f' FROM t2 UNION SELECT 'x' FROM t2
+;
+CREATE TABLE t1 (
+pk int NOT NULL,
+col_varchar_key varchar(1) DEFAULT NULL,
+PRIMARY KEY (pk),
+KEY col_varchar_key (col_varchar_key)
+);
+SELECT t1.pk
+FROM t1
+WHERE t1.col_varchar_key < ALL ( SELECT * FROM v1 )
+;
+pk
+SET SESSION sql_mode=@old_sql_mode;
+drop table t2, t1;
+drop view v1;
+#
+# BUG#50257: Missing info in REF column of the EXPLAIN 
+#            lines for subselects
+#
+CREATE TABLE t1 (a INT, b INT, INDEX (a));
+INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
+EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	5	const	1	
+EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
+2	SUBQUERY	t1	ref	a	a	5	const	1	Using index
+DROP TABLE t1;
+#
+# BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+# (duplicate of LP bug #888456)
+#
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	table1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	table2	index	NULL	f1_key	4	NULL	10	Using where; Using index; Using join buffer (flat, BNL join)
+2	DEPENDENT SUBQUERY	t2	index	f1_key	f1_key	4	NULL	10	Using where; Using index
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+f1	f1_key
+v	j
+s	j
+v	v
+s	v
+v	c
+s	c
+v	m
+s	m
+v	d
+s	d
+v	d
+s	d
+v	y
+s	y
+v	t
+s	t
+v	d
+s	d
+v	s
+s	s
+DROP TABLE t1,t2;
+#
+# LP bug 919427: EXPLAIN for a query over a single-row table 
+#                with IN subquery in WHERE condition
+# 
+CREATE TABLE ot (
+col_int_nokey int(11), 
+col_varchar_nokey varchar(1)
+) ;
+INSERT INTO ot VALUES (1,'x');
+CREATE TABLE it1(
+col_int_key int(11), 
+col_varchar_key varchar(1), 
+KEY idx_cvk_cik (col_varchar_key,col_int_key)
+);
+INSERT INTO it1 VALUES (NULL,'x'), (NULL,'f');
+CREATE TABLE it2 (
+col_int_key int(11),
+col_varchar_key varchar(1),
+col_varchar_key2 varchar(1),
+KEY idx_cvk_cvk2_cik (col_varchar_key, col_varchar_key2, col_int_key),
+KEY idx_cvk_cik (col_varchar_key, col_int_key)
+);
+INSERT INTO it2 VALUES (NULL,'x','x'), (NULL,'f','f');
+EXPLAIN
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+2	DEPENDENT SUBQUERY	it1	index_subquery	idx_cvk_cik	idx_cvk_cik	9	func,const	2	Using index; Using where
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+col_int_nokey
+1
+EXPLAIN
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+2	DEPENDENT SUBQUERY	it2	index_subquery	idx_cvk_cvk2_cik,idx_cvk_cik	idx_cvk_cvk2_cik	8	func,const	1	Using index; Using where
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+col_int_nokey
+1
+DROP TABLE ot,it1,it2;
 End of 5.2 tests
 #
 # BUG#779885: Crash in eliminate_item_equal with materialization=on in
-# maria-5.3
 #
 CREATE TABLE t1 ( f1 int );
 INSERT INTO t1 VALUES (19), (20);
@@ -5894,32 +6049,6 @@ b	c
 9	NULL
 SET optimizer_switch=@save_optimizer_switch;
 drop table t1, t2, t3;
-End of 5.3 tests
-#
-# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
-#
-CREATE TABLE t1(a1 int);
-INSERT INTO t1 VALUES (1),(2);
-CREATE TABLE t2(a1 int);
-INSERT INTO t2 VALUES (3);
-SELECT @@session.sql_mode INTO @old_sql_mode;
-SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
-1
-1
-1
-SET SESSION sql_mode=@old_sql_mode;
-DROP TABLE t1, t2;
 #
 # BUG#50257: Missing info in REF column of the EXPLAIN 
 #            lines for subselects
@@ -5942,6 +6071,54 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 
 DROP TABLE t1;
 #
+# Bug#11764086: Null left operand to NOT IN in WHERE clause
+# behaves differently than real NULL
+#
+CREATE TABLE parent (id int);
+INSERT INTO parent VALUES (1), (2);
+CREATE TABLE child (parent_id int, other int);
+INSERT INTO child VALUES (1,NULL);
+# Offending query (c.parent_id is NULL for null-complemented rows only)
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id NOT IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+);
+id	parent_id
+1	1
+2	NULL
+# Some syntactic variations with IS FALSE and IS NOT TRUE
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS NOT TRUE;
+id	parent_id
+1	1
+2	NULL
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS FALSE;
+id	parent_id
+1	1
+2	NULL
+DROP TABLE parent, child;
+# End of test for bug#11764086.
+#
 # Bug 11765699 - 58690: !TABLE || (!TABLE->READ_SET || 
 #                BITMAP_IS_SET(TABLE->READ_SET, FIELD_INDEX
 #
@@ -6280,6 +6457,15 @@ SELECT ( SELECT b FROM t2 WHERE b = a OR rand() * 0) FROM t1;
 1
 NULL
 drop table t1,t2,t3;
+#
+# LP BUG#905353 Wrong non-empty result with a constant table,
+# aggregate function in subquery, MyISAM or Aria
+#
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+SELECT a FROM t1 WHERE ( SELECT MIN(a) = 100 );
+a
+drop table t1;
 # return optimizer switch changed in the beginning of this test
 set optimizer_switch=@subselect_tmp;
 set @optimizer_switch_for_subselect_test=null;
diff --git a/mysql-test/r/subselect_no_scache.result b/mysql-test/r/subselect_no_scache.result
index 320e51da39e..3e2305ebe73 100644
--- a/mysql-test/r/subselect_no_scache.result
+++ b/mysql-test/r/subselect_no_scache.result
@@ -4626,6 +4626,13 @@ CREATE TABLE t1(a1 int);
 INSERT INTO t1 VALUES (1),(2);
 SELECT @@session.sql_mode INTO @old_sql_mode;
 SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+EXPLAIN EXTENDED
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+Warnings:
+Note	1003	select 1 AS `1` from `test`.`t1` where <nop>(<in_optimizer>(1,((select max(`test`.`t1`.`a1`) from `test`.`t1`) > 1)))
 SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
 1
 1
@@ -5328,7 +5335,6 @@ EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
 WHERE t1.a = d1.a;
 ERROR 42S22: Unknown column 'd1.a' in 'where clause'
 DROP TABLE t1;
-End of 5.1 tests.
 Set up test tables.
 CREATE TABLE t1 (
 t1_id INT UNSIGNED,
@@ -5853,10 +5859,161 @@ NULL
 NULL
 5
 DROP TABLE t1, t2, t3;
+#
+# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
+#
+CREATE TABLE t1(a1 int);
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2(a1 int);
+INSERT INTO t2 VALUES (3);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
+1
+1
+1
+SET SESSION sql_mode=@old_sql_mode;
+DROP TABLE t1, t2;
+create table t2(i int);
+insert into t2 values(0);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+CREATE VIEW v1 AS  
+SELECT 'f' FROM t2 UNION SELECT 'x' FROM t2
+;
+CREATE TABLE t1 (
+pk int NOT NULL,
+col_varchar_key varchar(1) DEFAULT NULL,
+PRIMARY KEY (pk),
+KEY col_varchar_key (col_varchar_key)
+);
+SELECT t1.pk
+FROM t1
+WHERE t1.col_varchar_key < ALL ( SELECT * FROM v1 )
+;
+pk
+SET SESSION sql_mode=@old_sql_mode;
+drop table t2, t1;
+drop view v1;
+#
+# BUG#50257: Missing info in REF column of the EXPLAIN 
+#            lines for subselects
+#
+CREATE TABLE t1 (a INT, b INT, INDEX (a));
+INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
+EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	5	const	1	
+EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
+2	SUBQUERY	t1	ref	a	a	5	const	1	Using index
+DROP TABLE t1;
+#
+# BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+# (duplicate of LP bug #888456)
+#
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	table1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	table2	index	NULL	f1_key	4	NULL	10	Using where; Using index; Using join buffer (flat, BNL join)
+2	DEPENDENT SUBQUERY	t2	index	f1_key	f1_key	4	NULL	10	Using where; Using index
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+f1	f1_key
+v	j
+s	j
+v	v
+s	v
+v	c
+s	c
+v	m
+s	m
+v	d
+s	d
+v	d
+s	d
+v	y
+s	y
+v	t
+s	t
+v	d
+s	d
+v	s
+s	s
+DROP TABLE t1,t2;
+#
+# LP bug 919427: EXPLAIN for a query over a single-row table 
+#                with IN subquery in WHERE condition
+# 
+CREATE TABLE ot (
+col_int_nokey int(11), 
+col_varchar_nokey varchar(1)
+) ;
+INSERT INTO ot VALUES (1,'x');
+CREATE TABLE it1(
+col_int_key int(11), 
+col_varchar_key varchar(1), 
+KEY idx_cvk_cik (col_varchar_key,col_int_key)
+);
+INSERT INTO it1 VALUES (NULL,'x'), (NULL,'f');
+CREATE TABLE it2 (
+col_int_key int(11),
+col_varchar_key varchar(1),
+col_varchar_key2 varchar(1),
+KEY idx_cvk_cvk2_cik (col_varchar_key, col_varchar_key2, col_int_key),
+KEY idx_cvk_cik (col_varchar_key, col_int_key)
+);
+INSERT INTO it2 VALUES (NULL,'x','x'), (NULL,'f','f');
+EXPLAIN
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	5	func	1	
+2	MATERIALIZED	it1	ref	idx_cvk_cik	idx_cvk_cik	9	const,const	1	Using where; Using index
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+col_int_nokey
+1
+EXPLAIN
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	10	func,func	1	
+2	MATERIALIZED	it2	ref	idx_cvk_cvk2_cik,idx_cvk_cik	idx_cvk_cvk2_cik	8	const,const	1	Using where; Using index
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+col_int_nokey
+1
+DROP TABLE ot,it1,it2;
 End of 5.2 tests
 #
 # BUG#779885: Crash in eliminate_item_equal with materialization=on in
-# maria-5.3
 #
 CREATE TABLE t1 ( f1 int );
 INSERT INTO t1 VALUES (19), (20);
@@ -5903,32 +6060,6 @@ b	c
 9	NULL
 SET optimizer_switch=@save_optimizer_switch;
 drop table t1, t2, t3;
-End of 5.3 tests
-#
-# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
-#
-CREATE TABLE t1(a1 int);
-INSERT INTO t1 VALUES (1),(2);
-CREATE TABLE t2(a1 int);
-INSERT INTO t2 VALUES (3);
-SELECT @@session.sql_mode INTO @old_sql_mode;
-SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
-1
-1
-1
-SET SESSION sql_mode=@old_sql_mode;
-DROP TABLE t1, t2;
 #
 # BUG#50257: Missing info in REF column of the EXPLAIN 
 #            lines for subselects
@@ -5951,6 +6082,54 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 
 DROP TABLE t1;
 #
+# Bug#11764086: Null left operand to NOT IN in WHERE clause
+# behaves differently than real NULL
+#
+CREATE TABLE parent (id int);
+INSERT INTO parent VALUES (1), (2);
+CREATE TABLE child (parent_id int, other int);
+INSERT INTO child VALUES (1,NULL);
+# Offending query (c.parent_id is NULL for null-complemented rows only)
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id NOT IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+);
+id	parent_id
+1	1
+2	NULL
+# Some syntactic variations with IS FALSE and IS NOT TRUE
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS NOT TRUE;
+id	parent_id
+1	1
+2	NULL
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS FALSE;
+id	parent_id
+1	1
+2	NULL
+DROP TABLE parent, child;
+# End of test for bug#11764086.
+#
 # Bug 11765699 - 58690: !TABLE || (!TABLE->READ_SET || 
 #                BITMAP_IS_SET(TABLE->READ_SET, FIELD_INDEX
 #
@@ -6289,6 +6468,15 @@ SELECT ( SELECT b FROM t2 WHERE b = a OR rand() * 0) FROM t1;
 1
 NULL
 drop table t1,t2,t3;
+#
+# LP BUG#905353 Wrong non-empty result with a constant table,
+# aggregate function in subquery, MyISAM or Aria
+#
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+SELECT a FROM t1 WHERE ( SELECT MIN(a) = 100 );
+a
+drop table t1;
 # return optimizer switch changed in the beginning of this test
 set optimizer_switch=@subselect_tmp;
 set optimizer_switch=default;
diff --git a/mysql-test/r/subselect_no_semijoin.result b/mysql-test/r/subselect_no_semijoin.result
index 0c41f612ae9..47368b1eca7 100644
--- a/mysql-test/r/subselect_no_semijoin.result
+++ b/mysql-test/r/subselect_no_semijoin.result
@@ -4618,6 +4618,13 @@ CREATE TABLE t1(a1 int);
 INSERT INTO t1 VALUES (1),(2);
 SELECT @@session.sql_mode INTO @old_sql_mode;
 SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+EXPLAIN EXTENDED
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+2	SUBQUERY	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
+Warnings:
+Note	1003	select 1 AS `1` from `test`.`t1` where <nop>(<in_optimizer>(1,((select max(`test`.`t1`.`a1`) from `test`.`t1`) > 1)))
 SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
 1
 1
@@ -5320,7 +5327,6 @@ EXPLAIN EXTENDED SELECT DISTINCT 1 FROM t1,
 WHERE t1.a = d1.a;
 ERROR 42S22: Unknown column 'd1.a' in 'where clause'
 DROP TABLE t1;
-End of 5.1 tests.
 Set up test tables.
 CREATE TABLE t1 (
 t1_id INT UNSIGNED,
@@ -5844,10 +5850,159 @@ NULL
 NULL
 5
 DROP TABLE t1, t2, t3;
+#
+# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
+#
+CREATE TABLE t1(a1 int);
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2(a1 int);
+INSERT INTO t2 VALUES (3);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
+1
+1
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
+1
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
+1
+1
+1
+SET SESSION sql_mode=@old_sql_mode;
+DROP TABLE t1, t2;
+create table t2(i int);
+insert into t2 values(0);
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+CREATE VIEW v1 AS  
+SELECT 'f' FROM t2 UNION SELECT 'x' FROM t2
+;
+CREATE TABLE t1 (
+pk int NOT NULL,
+col_varchar_key varchar(1) DEFAULT NULL,
+PRIMARY KEY (pk),
+KEY col_varchar_key (col_varchar_key)
+);
+SELECT t1.pk
+FROM t1
+WHERE t1.col_varchar_key < ALL ( SELECT * FROM v1 )
+;
+pk
+SET SESSION sql_mode=@old_sql_mode;
+drop table t2, t1;
+drop view v1;
+#
+# BUG#50257: Missing info in REF column of the EXPLAIN 
+#            lines for subselects
+#
+CREATE TABLE t1 (a INT, b INT, INDEX (a));
+INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
+EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ref	a	a	5	const	1	
+EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
+2	SUBQUERY	t1	ref	a	a	5	const	1	Using index
+DROP TABLE t1;
+#
+# BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+# (duplicate of LP bug #888456)
+#
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	table1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	table2	index	NULL	f1_key	4	NULL	10	Using where; Using index; Using join buffer (flat, BNL join)
+2	DEPENDENT SUBQUERY	t2	index	f1_key	f1_key	4	NULL	10	Using where; Using index
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+f1	f1_key
+v	j
+s	j
+v	v
+s	v
+v	c
+s	c
+v	m
+s	m
+v	d
+s	d
+v	d
+s	d
+v	y
+s	y
+v	t
+s	t
+v	d
+s	d
+v	s
+s	s
+DROP TABLE t1,t2;
+#
+# LP bug 919427: EXPLAIN for a query over a single-row table 
+#                with IN subquery in WHERE condition
+# 
+CREATE TABLE ot (
+col_int_nokey int(11), 
+col_varchar_nokey varchar(1)
+) ;
+INSERT INTO ot VALUES (1,'x');
+CREATE TABLE it1(
+col_int_key int(11), 
+col_varchar_key varchar(1), 
+KEY idx_cvk_cik (col_varchar_key,col_int_key)
+);
+INSERT INTO it1 VALUES (NULL,'x'), (NULL,'f');
+CREATE TABLE it2 (
+col_int_key int(11),
+col_varchar_key varchar(1),
+col_varchar_key2 varchar(1),
+KEY idx_cvk_cvk2_cik (col_varchar_key, col_varchar_key2, col_int_key),
+KEY idx_cvk_cik (col_varchar_key, col_int_key)
+);
+INSERT INTO it2 VALUES (NULL,'x','x'), (NULL,'f','f');
+EXPLAIN
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+2	DEPENDENT SUBQUERY	it1	index_subquery	idx_cvk_cik	idx_cvk_cik	9	func,const	2	Using index; Using where
+SELECT col_int_nokey FROM ot 
+WHERE col_varchar_nokey IN 
+(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+col_int_nokey
+1
+EXPLAIN
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot	system	NULL	NULL	NULL	NULL	1	
+2	DEPENDENT SUBQUERY	it2	index_subquery	idx_cvk_cvk2_cik,idx_cvk_cik	idx_cvk_cvk2_cik	8	func,const	1	Using index; Using where
+SELECT col_int_nokey FROM ot
+WHERE (col_varchar_nokey, 'x') IN
+(SELECT col_varchar_key, col_varchar_key2 FROM it2);
+col_int_nokey
+1
+DROP TABLE ot,it1,it2;
 End of 5.2 tests
 #
 # BUG#779885: Crash in eliminate_item_equal with materialization=on in
-# maria-5.3
 #
 CREATE TABLE t1 ( f1 int );
 INSERT INTO t1 VALUES (19), (20);
@@ -5894,32 +6049,6 @@ b	c
 9	NULL
 SET optimizer_switch=@save_optimizer_switch;
 drop table t1, t2, t3;
-End of 5.3 tests
-#
-# Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
-#
-CREATE TABLE t1(a1 int);
-INSERT INTO t1 VALUES (1),(2);
-CREATE TABLE t2(a1 int);
-INSERT INTO t2 VALUES (3);
-SELECT @@session.sql_mode INTO @old_sql_mode;
-SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
-1
-1
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
-1
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
-1
-1
-1
-SET SESSION sql_mode=@old_sql_mode;
-DROP TABLE t1, t2;
 #
 # BUG#50257: Missing info in REF column of the EXPLAIN 
 #            lines for subselects
@@ -5942,6 +6071,54 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 
 DROP TABLE t1;
 #
+# Bug#11764086: Null left operand to NOT IN in WHERE clause
+# behaves differently than real NULL
+#
+CREATE TABLE parent (id int);
+INSERT INTO parent VALUES (1), (2);
+CREATE TABLE child (parent_id int, other int);
+INSERT INTO child VALUES (1,NULL);
+# Offending query (c.parent_id is NULL for null-complemented rows only)
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id NOT IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+);
+id	parent_id
+1	1
+2	NULL
+# Some syntactic variations with IS FALSE and IS NOT TRUE
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS NOT TRUE;
+id	parent_id
+1	1
+2	NULL
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+SELECT parent_id 
+FROM   child
+WHERE  parent_id = 3
+) IS FALSE;
+id	parent_id
+1	1
+2	NULL
+DROP TABLE parent, child;
+# End of test for bug#11764086.
+#
 # Bug 11765699 - 58690: !TABLE || (!TABLE->READ_SET || 
 #                BITMAP_IS_SET(TABLE->READ_SET, FIELD_INDEX
 #
@@ -6280,6 +6457,15 @@ SELECT ( SELECT b FROM t2 WHERE b = a OR rand() * 0) FROM t1;
 1
 NULL
 drop table t1,t2,t3;
+#
+# LP BUG#905353 Wrong non-empty result with a constant table,
+# aggregate function in subquery, MyISAM or Aria
+#
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+SELECT a FROM t1 WHERE ( SELECT MIN(a) = 100 );
+a
+drop table t1;
 # return optimizer switch changed in the beginning of this test
 set optimizer_switch=@subselect_tmp;
 set @optimizer_switch_for_subselect_test=null;
diff --git a/mysql-test/r/subselect_sj.result b/mysql-test/r/subselect_sj.result
index 8fcedc5807f..3bc1d1f4293 100644
--- a/mysql-test/r/subselect_sj.result
+++ b/mysql-test/r/subselect_sj.result
@@ -1231,6 +1231,364 @@ IN (SELECT t3.pk, t3.pk FROM t2 LEFT JOIN t3 ON t3.varchar_key)
 AND pk = 9;
 datetime_key
 DROP TABLE t1, t2, t3;
+# 
+# BUG#53060: LooseScan semijoin strategy does not return all rows
+# 
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=on,materialization=off';
+set optimizer_switch='firstmatch=off,loosescan=on';
+CREATE TABLE t1 (i INTEGER);
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
+CREATE TABLE t2 (i INTEGER, j INTEGER, KEY k(i, j));
+INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
+EXPLAIN
+SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t2	index	k	k	10	NULL	4	Using where; Using index; LooseScan
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
+i
+1
+2
+DROP TABLE t1, t2;
+set optimizer_switch=@save_optimizer_switch;
+#
+# BUG#49453: re-execution of prepared statement with view 
+#            and semijoin crashes
+#
+CREATE TABLE t1 (city VARCHAR(50), country_id INT);
+CREATE TABLE t2 (country_id INT, country VARCHAR(50));
+INSERT INTO t1 VALUES 
+('Batna',2),('Bchar',2),('Skikda',2),('Tafuna',3),('Algeria',2) ;
+INSERT INTO t2 VALUES (2,'Algeria'),(2,'AlgeriaDup'),(3,'XAmerican Samoa');
+CREATE VIEW v1 AS 
+SELECT country_id as vf_country_id
+FROM t2
+WHERE LEFT(country,1) = "A";
+PREPARE stmt FROM "
+SELECT city, country_id
+FROM t1
+WHERE country_id IN (SELECT vf_country_id FROM v1);
+";
+
+EXECUTE stmt;
+city	country_id
+Batna	2
+Bchar	2
+Skikda	2
+Algeria	2
+EXECUTE stmt;
+city	country_id
+Batna	2
+Bchar	2
+Skikda	2
+Algeria	2
+DROP TABLE t1,t2;
+DROP VIEW v1;
+#
+# Bug#54437 Extra rows with LEFT JOIN + semijoin 
+#
+create table t1 (a int);
+create table t2 (a int);
+create table t3 (a int);
+insert into t1 values(1),(1);
+insert into t2 values(1),(1),(1),(1);
+insert into t3 values(2),(2);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='materialization=off';
+set optimizer_switch='semijoin=off';
+explain
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where
+2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+a
+1
+1
+set optimizer_switch='semijoin=on';
+explain
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where; Start temporary
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; End temporary
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+a
+1
+1
+set optimizer_switch=@save_optimizer_switch;
+drop table t1,t2,t3;
+#
+# Bug#55955: crash in MEMORY engine with IN(LEFT JOIN (JOIN))
+#
+CREATE TABLE t1 (a INT);
+CREATE TABLE t2 (a INT);
+CREATE TABLE t3 (a INT);
+INSERT INTO t1 VALUES(1),(1);
+INSERT INTO t2 VALUES(1),(1);
+INSERT INTO t3 VALUES(2),(2);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off,materialization=off';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2inner	ALL	NULL	NULL	NULL	NULL	2	
+2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+a
+1
+1
+set optimizer_switch='semijoin=off,materialization=on';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	
+2	MATERIALIZED	t2inner	ALL	NULL	NULL	NULL	NULL	2	
+2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	Using where
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+a
+1
+1
+set optimizer_switch='semijoin=on,materialization=off';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Start temporary
+1	PRIMARY	t2inner	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; End temporary
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+a
+1
+1
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE t1,t2,t3;
+#
+# BUG#52329 - Wrong result: subquery materialization, IN, 
+#             non-null field followed by nullable
+#
+CREATE TABLE t1 (a1 CHAR(8) NOT NULL, a2 char(8) NOT NULL);
+CREATE TABLE t2a (b1 char(8), b2 char(8));
+CREATE TABLE t2b (b1 CHAR(8), b2 char(8) NOT NULL);
+CREATE TABLE t2c (b1 CHAR(8) NOT NULL, b2 char(8));
+INSERT INTO t1 VALUES ('1 - 12', '2 - 22');
+INSERT INTO t2a VALUES ('1 - 11', '2 - 21'),
+('1 - 11', '2 - 21'),
+('1 - 12', '2 - 22'),
+('1 - 12', '2 - 22'),
+('1 - 13', '2 - 23');
+INSERT INTO t2b SELECT * FROM t2a;
+INSERT INTO t2c SELECT * FROM t2a;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off,materialization=on';
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2c WHERE b1 > '0' GROUP BY b1, b2);
+a1	a2
+1 - 12	2 - 22
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2a WHERE b1 > '0');
+a1	a2
+1 - 12	2 - 22
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2b WHERE b1 > '0');
+a1	a2
+1 - 12	2 - 22
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2c WHERE b1 > '0');
+a1	a2
+1 - 12	2 - 22
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE t1,t2a,t2b,t2c;
+#
+# Bug#57623: subquery within before insert trigger causes crash (sj=on)
+#
+CREATE TABLE ot1(a INT);
+CREATE TABLE ot2(a INT);
+CREATE TABLE ot3(a INT);
+CREATE TABLE it1(a INT);
+INSERT INTO ot1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
+INSERT INTO ot2 VALUES(0),(2),(4),(6);
+INSERT INTO ot3 VALUES(0),(3),(6);
+INSERT INTO it1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=on';
+set optimizer_switch='materialization=off';
+explain SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	8	
+1	PRIMARY	ot3	ALL	NULL	NULL	NULL	NULL	3	Using where
+1	PRIMARY	ot2	ALL	NULL	NULL	NULL	NULL	4	Using where
+2	DEPENDENT SUBQUERY	it1	ALL	NULL	NULL	NULL	NULL	8	Using where
+SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+a	a	a
+0	0	0
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+6	6	6
+7	NULL	NULL
+prepare s from 'SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';
+execute s;
+a	a	a
+0	0	0
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+6	6	6
+7	NULL	NULL
+execute s;
+a	a	a
+0	0	0
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+6	6	6
+7	NULL	NULL
+deallocate prepare s;
+set optimizer_switch='materialization=on';
+explain SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	8	
+1	PRIMARY	ot3	ALL	NULL	NULL	NULL	NULL	3	Using where
+1	PRIMARY	ot2	ALL	NULL	NULL	NULL	NULL	4	Using where
+2	MATERIALIZED	it1	ALL	NULL	NULL	NULL	NULL	8	
+SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+a	a	a
+0	0	0
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+6	6	6
+7	NULL	NULL
+prepare s from 'SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';
+execute s;
+a	a	a
+0	0	0
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+6	6	6
+7	NULL	NULL
+execute s;
+a	a	a
+0	0	0
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+6	6	6
+7	NULL	NULL
+deallocate prepare s;
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE ot1, ot2, ot3, it1;
+#
+# Bug#59919/11766739: Crash in tmp_table_param::init() with semijoin=on
+#
+CREATE TABLE t1 (f1 INTEGER) ENGINE=MyISAM;
+CREATE TABLE t2 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
+CREATE TABLE t3 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+INSERT INTO t2 VALUES (1,1), (2,1);
+INSERT INTO t3 VALUES 
+(1,1), (2,1), (5,4), (7,3), (8,2), (8,1), (7,3),
+(9,5), (4,3), (7,2), (7,7), (3,1), (5,8), (9,7);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off,materialization=on';
+EXPLAIN
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	14	Using where
+2	MATERIALIZED	t1	system	NULL	NULL	NULL	NULL	1	
+2	MATERIALIZED	b1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	MATERIALIZED	b2	ALL	NULL	NULL	NULL	NULL	2	
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+f1	f2
+1	1
+2	1
+8	1
+3	1
+set optimizer_switch='semijoin=on,materialization=on';
+EXPLAIN
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	1	
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	14	Using where; Using join buffer (flat, BNL join)
+2	MATERIALIZED	b1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	MATERIALIZED	b2	ALL	NULL	NULL	NULL	NULL	2	
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+f1	f2
+1	1
+2	1
+8	1
+3	1
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE t1, t2, t3 ;
+#
 #
 # BUG#784723: Wrong result with semijoin + nested subqueries in maria-5.3  
 #
@@ -2179,4 +2537,105 @@ WHERE c = b AND b = a
 a	COUNT(*)
 NULL	0
 DROP TABLE t1, t2, t3;
+#
+# BUG#920255: Wrong result (extra rows) with loosescan and IN subquery
+#
+CREATE TABLE t1 ( a INT PRIMARY KEY, b INT, KEY(b) );
+INSERT INTO t1 VALUES
+(1,2),(2,1),(3,3),(4,2),(5,5),
+(6,3),(7,1),(8,4),(9,3),(10,2);
+CREATE TABLE t2 ( c INT, d INT, UNIQUE KEY(c) );
+INSERT INTO t2 VALUES
+(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);
+SELECT a, b, d FROM t1, t2
+WHERE ( b, d ) IN
+( SELECT b, d FROM t1, t2 WHERE b = c );
+a	b	d
+2	1	2
+7	1	2
+2	1	2
+7	1	2
+1	2	1
+4	2	1
+10	2	1
+1	2	1
+4	2	1
+10	2	1
+3	3	3
+6	3	3
+9	3	3
+3	3	3
+6	3	3
+9	3	3
+8	4	2
+8	4	2
+5	5	5
+DROP TABLE t1, t2;
+#
+# BUG#920713: Wrong result (missing rows) with firstmatch+BNL, IN subquery, ...
+#
+CREATE TABLE t1 ( a VARCHAR(1) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES ('e'),('w'),('a'),('h'),('x'),('k'),('g');
+CREATE TABLE t2 ( b INT, c VARCHAR(1) );
+INSERT INTO t2 VALUES (0,'j'),(8,'v');
+SELECT * FROM t1 alias1, t2 alias2
+WHERE alias2.c IN (
+SELECT alias4.c FROM t1 alias3, t2 alias4
+);
+a	b	c
+e	0	j
+e	8	v
+w	0	j
+w	8	v
+a	0	j
+a	8	v
+h	0	j
+h	8	v
+x	0	j
+x	8	v
+k	0	j
+k	8	v
+g	0	j
+g	8	v
+DROP TABLE t1, t2;
+#
+# BUG#923246: Loosescan reports different result than other semijoin methods
+#
+set @tmp_923246= @@optimizer_switch;
+set optimizer_switch='mrr=on,materialization=off';
+create table t0 (a int);
+insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));
+insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;
+insert into t1 select * from t1 where kp1 < 20;
+create table t3 (a int);
+insert into t3 select A.a + 10*B.a from t0 A, t0 B;
+select * from t3 where a in (select kp1 from t1 where kp1<20);
+a
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+explain select * from t3 where a in (select kp1 from t1 where kp1<20);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	range	kp1	kp1	5	NULL	48	Using where; Using index; LooseScan
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	100	Using where; Using join buffer (flat, BNL join)
+drop table t0,t1,t3;
+set optimizer_switch= @tmp_923246;
 set optimizer_switch=@subselect_sj_tmp;
diff --git a/mysql-test/r/subselect_sj2.result b/mysql-test/r/subselect_sj2.result
index 85a3b6971bd..2d8c189942e 100644
--- a/mysql-test/r/subselect_sj2.result
+++ b/mysql-test/r/subselect_sj2.result
@@ -886,5 +886,19 @@ a	b	b	a
 c	c	NULL	NULL
 DROP VIEW v1;
 DROP TABLE t1,t2,t3,t4;
+#
+# BUG#912538: Wrong result (missing rows) with semijoin=on, firstmatch=on, ...
+#
+CREATE TABLE t1 ( a INT NOT NULL, UNIQUE KEY(a) );
+INSERT INTO t1 VALUES (1),(2),(3),(4);
+CREATE TABLE t2 ( b INT, c INT ) ENGINE=InnoDB;
+INSERT INTO t2 VALUES (1,1);
+SELECT * FROM t1, t2 WHERE c IN (SELECT c FROM t1, t2 WHERE a = b);
+a	b	c
+1	1	1
+2	1	1
+3	1	1
+4	1	1
+DROP TABLE t1,t2;
 # This must be the last in the file:
 set optimizer_switch=@subselect_sj2_tmp;
diff --git a/mysql-test/r/subselect_sj2_jcl6.result b/mysql-test/r/subselect_sj2_jcl6.result
index b179a735f20..f2895662196 100644
--- a/mysql-test/r/subselect_sj2_jcl6.result
+++ b/mysql-test/r/subselect_sj2_jcl6.result
@@ -900,6 +900,20 @@ a	b	b	a
 c	c	NULL	NULL
 DROP VIEW v1;
 DROP TABLE t1,t2,t3,t4;
+#
+# BUG#912538: Wrong result (missing rows) with semijoin=on, firstmatch=on, ...
+#
+CREATE TABLE t1 ( a INT NOT NULL, UNIQUE KEY(a) );
+INSERT INTO t1 VALUES (1),(2),(3),(4);
+CREATE TABLE t2 ( b INT, c INT ) ENGINE=InnoDB;
+INSERT INTO t2 VALUES (1,1);
+SELECT * FROM t1, t2 WHERE c IN (SELECT c FROM t1, t2 WHERE a = b);
+a	b	c
+1	1	1
+2	1	1
+3	1	1
+4	1	1
+DROP TABLE t1,t2;
 # This must be the last in the file:
 set optimizer_switch=@subselect_sj2_tmp;
 #
@@ -921,9 +935,9 @@ SELECT t3.* FROM t1 JOIN t3 ON t3.b = t1.b
 WHERE c IN (SELECT t4.b FROM t4 JOIN t2);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	1	Using where
-1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	FirstMatch(t3)
 1	PRIMARY	t1	ref	b	b	4	test.t3.b	1	Using index
-1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	Using where; FirstMatch(t2)
+1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	2	Using where; FirstMatch(t1)
 SELECT t3.* FROM t1 JOIN t3 ON t3.b = t1.b
 WHERE c IN (SELECT t4.b FROM t4 JOIN t2);
 b	c
@@ -949,12 +963,13 @@ EXPLAIN
 SELECT * FROM t1, t2 WHERE b IN (SELECT a FROM t3, t4 WHERE b = pk);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	1	
-1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	1	Using where
+1	PRIMARY	t4	ALL	NULL	NULL	NULL	NULL	1	Using where; FirstMatch(t2)
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
-1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t4.b	1	Using where; FirstMatch(t4)
+1	PRIMARY	t3	eq_ref	PRIMARY	PRIMARY	4	test.t4.b	1	Using where; FirstMatch(t1)
 SELECT * FROM t1, t2 WHERE b IN (SELECT a FROM t3, t4 WHERE b = pk);
 pk	a	b
 1	6	8
+2	8	8
 set optimizer_switch=@tmp_optimizer_switch;
 set join_cache_level=default;
 DROP TABLE t1,t2,t3,t4;
diff --git a/mysql-test/r/subselect_sj2_mat.result b/mysql-test/r/subselect_sj2_mat.result
index 0284bab0972..3e68c9ebeb5 100644
--- a/mysql-test/r/subselect_sj2_mat.result
+++ b/mysql-test/r/subselect_sj2_mat.result
@@ -888,6 +888,20 @@ a	b	b	a
 c	c	NULL	NULL
 DROP VIEW v1;
 DROP TABLE t1,t2,t3,t4;
+#
+# BUG#912538: Wrong result (missing rows) with semijoin=on, firstmatch=on, ...
+#
+CREATE TABLE t1 ( a INT NOT NULL, UNIQUE KEY(a) );
+INSERT INTO t1 VALUES (1),(2),(3),(4);
+CREATE TABLE t2 ( b INT, c INT ) ENGINE=InnoDB;
+INSERT INTO t2 VALUES (1,1);
+SELECT * FROM t1, t2 WHERE c IN (SELECT c FROM t1, t2 WHERE a = b);
+a	b	c
+1	1	1
+2	1	1
+3	1	1
+4	1	1
+DROP TABLE t1,t2;
 # This must be the last in the file:
 set optimizer_switch=@subselect_sj2_tmp;
 set optimizer_switch=default;
diff --git a/mysql-test/r/subselect_sj_jcl6.result b/mysql-test/r/subselect_sj_jcl6.result
index 88acba0ebea..8bb262af7ca 100644
--- a/mysql-test/r/subselect_sj_jcl6.result
+++ b/mysql-test/r/subselect_sj_jcl6.result
@@ -1244,6 +1244,364 @@ IN (SELECT t3.pk, t3.pk FROM t2 LEFT JOIN t3 ON t3.varchar_key)
 AND pk = 9;
 datetime_key
 DROP TABLE t1, t2, t3;
+# 
+# BUG#53060: LooseScan semijoin strategy does not return all rows
+# 
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=on,materialization=off';
+set optimizer_switch='firstmatch=off,loosescan=on';
+CREATE TABLE t1 (i INTEGER);
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
+CREATE TABLE t2 (i INTEGER, j INTEGER, KEY k(i, j));
+INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
+EXPLAIN
+SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t2	index	k	k	10	NULL	4	Using where; Using index; LooseScan
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	5	Using where; Using join buffer (flat, BNL join)
+SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
+i
+1
+2
+DROP TABLE t1, t2;
+set optimizer_switch=@save_optimizer_switch;
+#
+# BUG#49453: re-execution of prepared statement with view 
+#            and semijoin crashes
+#
+CREATE TABLE t1 (city VARCHAR(50), country_id INT);
+CREATE TABLE t2 (country_id INT, country VARCHAR(50));
+INSERT INTO t1 VALUES 
+('Batna',2),('Bchar',2),('Skikda',2),('Tafuna',3),('Algeria',2) ;
+INSERT INTO t2 VALUES (2,'Algeria'),(2,'AlgeriaDup'),(3,'XAmerican Samoa');
+CREATE VIEW v1 AS 
+SELECT country_id as vf_country_id
+FROM t2
+WHERE LEFT(country,1) = "A";
+PREPARE stmt FROM "
+SELECT city, country_id
+FROM t1
+WHERE country_id IN (SELECT vf_country_id FROM v1);
+";
+
+EXECUTE stmt;
+city	country_id
+Batna	2
+Bchar	2
+Skikda	2
+Algeria	2
+EXECUTE stmt;
+city	country_id
+Batna	2
+Bchar	2
+Skikda	2
+Algeria	2
+DROP TABLE t1,t2;
+DROP VIEW v1;
+#
+# Bug#54437 Extra rows with LEFT JOIN + semijoin 
+#
+create table t1 (a int);
+create table t2 (a int);
+create table t3 (a int);
+insert into t1 values(1),(1);
+insert into t2 values(1),(1),(1),(1);
+insert into t3 values(2),(2);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='materialization=off';
+set optimizer_switch='semijoin=off';
+explain
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where
+2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+a
+1
+1
+set optimizer_switch='semijoin=on';
+explain
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	4	Using where; Start temporary; Using join buffer (flat, BNL join)
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; End temporary; Using join buffer (incremental, BNL join)
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+a
+1
+1
+set optimizer_switch=@save_optimizer_switch;
+drop table t1,t2,t3;
+#
+# Bug#55955: crash in MEMORY engine with IN(LEFT JOIN (JOIN))
+#
+CREATE TABLE t1 (a INT);
+CREATE TABLE t2 (a INT);
+CREATE TABLE t3 (a INT);
+INSERT INTO t1 VALUES(1),(1);
+INSERT INTO t2 VALUES(1),(1);
+INSERT INTO t3 VALUES(2),(2);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off,materialization=off';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	DEPENDENT SUBQUERY	t2inner	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
+2	DEPENDENT SUBQUERY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (incremental, BNL join)
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+a
+1
+1
+set optimizer_switch='semijoin=off,materialization=on';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	MATERIALIZED	t2	ALL	NULL	NULL	NULL	NULL	2	
+2	MATERIALIZED	t2inner	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (flat, BNL join)
+2	MATERIALIZED	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (incremental, BNL join)
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+a
+1
+1
+set optimizer_switch='semijoin=on,materialization=off';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	2	
+1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; Start temporary; Using join buffer (flat, BNL join)
+1	PRIMARY	t2inner	ALL	NULL	NULL	NULL	NULL	2	Using join buffer (incremental, BNL join)
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	2	Using where; End temporary; Using join buffer (incremental, BNL join)
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+a
+1
+1
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE t1,t2,t3;
+#
+# BUG#52329 - Wrong result: subquery materialization, IN, 
+#             non-null field followed by nullable
+#
+CREATE TABLE t1 (a1 CHAR(8) NOT NULL, a2 char(8) NOT NULL);
+CREATE TABLE t2a (b1 char(8), b2 char(8));
+CREATE TABLE t2b (b1 CHAR(8), b2 char(8) NOT NULL);
+CREATE TABLE t2c (b1 CHAR(8) NOT NULL, b2 char(8));
+INSERT INTO t1 VALUES ('1 - 12', '2 - 22');
+INSERT INTO t2a VALUES ('1 - 11', '2 - 21'),
+('1 - 11', '2 - 21'),
+('1 - 12', '2 - 22'),
+('1 - 12', '2 - 22'),
+('1 - 13', '2 - 23');
+INSERT INTO t2b SELECT * FROM t2a;
+INSERT INTO t2c SELECT * FROM t2a;
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off,materialization=on';
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2c WHERE b1 > '0' GROUP BY b1, b2);
+a1	a2
+1 - 12	2 - 22
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2a WHERE b1 > '0');
+a1	a2
+1 - 12	2 - 22
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2b WHERE b1 > '0');
+a1	a2
+1 - 12	2 - 22
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+SELECT b1, b2 FROM t2c WHERE b1 > '0');
+a1	a2
+1 - 12	2 - 22
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE t1,t2a,t2b,t2c;
+#
+# Bug#57623: subquery within before insert trigger causes crash (sj=on)
+#
+CREATE TABLE ot1(a INT);
+CREATE TABLE ot2(a INT);
+CREATE TABLE ot3(a INT);
+CREATE TABLE it1(a INT);
+INSERT INTO ot1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
+INSERT INTO ot2 VALUES(0),(2),(4),(6);
+INSERT INTO ot3 VALUES(0),(3),(6);
+INSERT INTO it1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=on';
+set optimizer_switch='materialization=off';
+explain SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	8	
+1	PRIMARY	ot3	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (flat, BNL join)
+1	PRIMARY	ot2	ALL	NULL	NULL	NULL	NULL	4	Using where; Using join buffer (incremental, BNL join)
+2	DEPENDENT SUBQUERY	it1	ALL	NULL	NULL	NULL	NULL	8	Using where
+SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+a	a	a
+0	0	0
+6	6	6
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+7	NULL	NULL
+prepare s from 'SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';
+execute s;
+a	a	a
+0	0	0
+6	6	6
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+7	NULL	NULL
+execute s;
+a	a	a
+0	0	0
+6	6	6
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+7	NULL	NULL
+deallocate prepare s;
+set optimizer_switch='materialization=on';
+explain SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	ot1	ALL	NULL	NULL	NULL	NULL	8	
+1	PRIMARY	ot3	ALL	NULL	NULL	NULL	NULL	3	Using where; Using join buffer (flat, BNL join)
+1	PRIMARY	ot2	ALL	NULL	NULL	NULL	NULL	4	Using where; Using join buffer (incremental, BNL join)
+2	MATERIALIZED	it1	ALL	NULL	NULL	NULL	NULL	8	
+SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+a	a	a
+0	0	0
+6	6	6
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+7	NULL	NULL
+prepare s from 'SELECT *
+FROM   ot1
+LEFT JOIN
+(ot2 JOIN ot3 on ot2.a=ot3.a)
+ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';
+execute s;
+a	a	a
+0	0	0
+6	6	6
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+7	NULL	NULL
+execute s;
+a	a	a
+0	0	0
+6	6	6
+1	NULL	NULL
+2	NULL	NULL
+3	NULL	NULL
+4	NULL	NULL
+5	NULL	NULL
+7	NULL	NULL
+deallocate prepare s;
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE ot1, ot2, ot3, it1;
+#
+# Bug#59919/11766739: Crash in tmp_table_param::init() with semijoin=on
+#
+CREATE TABLE t1 (f1 INTEGER) ENGINE=MyISAM;
+CREATE TABLE t2 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
+CREATE TABLE t3 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+INSERT INTO t2 VALUES (1,1), (2,1);
+INSERT INTO t3 VALUES 
+(1,1), (2,1), (5,4), (7,3), (8,2), (8,1), (7,3),
+(9,5), (4,3), (7,2), (7,7), (3,1), (5,8), (9,7);
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off,materialization=on';
+EXPLAIN
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	14	Using where
+2	MATERIALIZED	t1	system	NULL	NULL	NULL	NULL	1	
+2	MATERIALIZED	b1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	MATERIALIZED	b2	ALL	NULL	NULL	NULL	NULL	2	
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+f1	f2
+1	1
+2	1
+8	1
+3	1
+set optimizer_switch='semijoin=on,materialization=on';
+EXPLAIN
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
+1	PRIMARY	<subquery2>	ALL	distinct_key	NULL	NULL	NULL	1	
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	14	Using where; Using join buffer (flat, BNL join)
+2	MATERIALIZED	b1	ALL	NULL	NULL	NULL	NULL	2	Using where
+2	MATERIALIZED	b2	ALL	NULL	NULL	NULL	NULL	2	
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+f1	f2
+1	1
+2	1
+8	1
+3	1
+set optimizer_switch=@save_optimizer_switch;
+DROP TABLE t1, t2, t3 ;
+#
 #
 # BUG#784723: Wrong result with semijoin + nested subqueries in maria-5.3  
 #
@@ -2193,6 +2551,107 @@ WHERE c = b AND b = a
 a	COUNT(*)
 NULL	0
 DROP TABLE t1, t2, t3;
+#
+# BUG#920255: Wrong result (extra rows) with loosescan and IN subquery
+#
+CREATE TABLE t1 ( a INT PRIMARY KEY, b INT, KEY(b) );
+INSERT INTO t1 VALUES
+(1,2),(2,1),(3,3),(4,2),(5,5),
+(6,3),(7,1),(8,4),(9,3),(10,2);
+CREATE TABLE t2 ( c INT, d INT, UNIQUE KEY(c) );
+INSERT INTO t2 VALUES
+(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);
+SELECT a, b, d FROM t1, t2
+WHERE ( b, d ) IN
+( SELECT b, d FROM t1, t2 WHERE b = c );
+a	b	d
+1	2	1
+1	2	1
+2	1	2
+2	1	2
+3	3	3
+3	3	3
+4	2	1
+4	2	1
+5	5	5
+6	3	3
+6	3	3
+7	1	2
+7	1	2
+8	4	2
+8	4	2
+9	3	3
+9	3	3
+10	2	1
+10	2	1
+DROP TABLE t1, t2;
+#
+# BUG#920713: Wrong result (missing rows) with firstmatch+BNL, IN subquery, ...
+#
+CREATE TABLE t1 ( a VARCHAR(1) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES ('e'),('w'),('a'),('h'),('x'),('k'),('g');
+CREATE TABLE t2 ( b INT, c VARCHAR(1) );
+INSERT INTO t2 VALUES (0,'j'),(8,'v');
+SELECT * FROM t1 alias1, t2 alias2
+WHERE alias2.c IN (
+SELECT alias4.c FROM t1 alias3, t2 alias4
+);
+a	b	c
+e	0	j
+e	8	v
+w	0	j
+w	8	v
+a	0	j
+a	8	v
+h	0	j
+h	8	v
+x	0	j
+x	8	v
+k	0	j
+k	8	v
+g	0	j
+g	8	v
+DROP TABLE t1, t2;
+#
+# BUG#923246: Loosescan reports different result than other semijoin methods
+#
+set @tmp_923246= @@optimizer_switch;
+set optimizer_switch='mrr=on,materialization=off';
+create table t0 (a int);
+insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));
+insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;
+insert into t1 select * from t1 where kp1 < 20;
+create table t3 (a int);
+insert into t3 select A.a + 10*B.a from t0 A, t0 B;
+select * from t3 where a in (select kp1 from t1 where kp1<20);
+a
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
+17
+18
+19
+explain select * from t3 where a in (select kp1 from t1 where kp1<20);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	range	kp1	kp1	5	NULL	48	Using where; Using index; LooseScan
+1	PRIMARY	t3	ALL	NULL	NULL	NULL	NULL	100	Using where; Using join buffer (flat, BNL join)
+drop table t0,t1,t3;
+set optimizer_switch= @tmp_923246;
 set optimizer_switch=@subselect_sj_tmp;
 #
 # BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off
@@ -2274,6 +2733,35 @@ w	5	19:11:10
 set optimizer_switch=@save_optimizer_switch;
 set join_cache_level=default;
 DROP TABLE t1,t2,t3;
+#
+# BUG#912513: Wrong result (missing rows) with join_cache_hashed+materialization+semijoin=on
+#
+set @os_912513= @@optimizer_switch;
+set @jcl_912513= @@join_cache_level;
+SET optimizer_switch = 'semijoin=on,materialization=on,join_cache_hashed=on';
+SET join_cache_level = 3;
+CREATE TABLE t1 ( a INT, b INT, KEY(a) );
+INSERT INTO t1 VALUES
+(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7);
+CREATE TABLE t2 ( c INT );
+INSERT INTO t2 VALUES (1),(2),(3),(4),(5),(6),(7);
+SELECT alias1.* FROM
+t1 AS alias1 INNER JOIN t1 AS alias2
+ON alias2.a = alias1.b
+WHERE alias1.b IN (
+SELECT a FROM t1, t2
+);
+a	b
+1	1
+2	2
+3	3
+4	4
+5	5
+6	6
+7	7
+DROP table t1, t2;
+set @@optimizer_switch= @os_912513;
+set @@join_cache_level= @jcl_912513;
 # End
 set join_cache_level=default;
 show variables like 'join_cache_level';
diff --git a/mysql-test/r/subselect_sj_mat.result b/mysql-test/r/subselect_sj_mat.result
index ee8a365327c..b3a205eb071 100644
--- a/mysql-test/r/subselect_sj_mat.result
+++ b/mysql-test/r/subselect_sj_mat.result
@@ -1849,6 +1849,42 @@ a	b	c
 4	4	2
 4	4	4
 DROP TABLE t1,t2;
+#
+# BUG#922254: Assertion `0' failed at item_cmpfunc.cc:5899: Item* Item_equal::get_first(JOIN_TAB*, Item*)
+#
+CREATE TABLE t1 ( a VARCHAR(3) );
+CREATE TABLE t2 ( b VARCHAR(3), c VARCHAR(8), KEY(c) );
+INSERT INTO t2 VALUES ('USA','Abilene'),('USA','Akron');
+EXPLAIN
+SELECT * FROM
+( SELECT * FROM t1 ) AS alias1,
+t2 AS alias2
+WHERE b = a AND a IN (
+SELECT alias3.c
+FROM t2 AS alias3, t2 AS alias4
+WHERE alias4.c = alias3.b
+);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible WHERE noticed after reading const tables
+DROP TABLE t1,t2;
+#
+# BUG#928048: Query containing IN subquery with OR in the where clause returns a wrong result
+#
+create table t1 (a int, b int);
+insert into t1 values (7,5), (3,3), (5,4), (9,3);
+create table t2 (a int, b int, index i_a(a));
+insert into t2 values
+(4,2), (7,9), (7,4), (3,1), (5,3), (3,1), (9,4), (8,1);
+explain select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	4	
+1	PRIMARY	<subquery2>	eq_ref	distinct_key	distinct_key	5	func	1	
+2	MATERIALIZED	t2	ALL	i_a	NULL	NULL	NULL	8	Using where
+select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
+a	b
+7	5
+3	3
+drop table t1,t2;
 # This must be at the end:
 set optimizer_switch=@subselect_sj_mat_tmp;
 set join_cache_level=@save_join_cache_level;
diff --git a/mysql-test/r/sum_distinct.result b/mysql-test/r/sum_distinct.result
index c615817f52d..2746f5a09f4 100644
--- a/mysql-test/r/sum_distinct.result
+++ b/mysql-test/r/sum_distinct.result
@@ -95,3 +95,15 @@ SELECT SUM(DISTINCT id % 11) FROM t1;
 SUM(DISTINCT id % 11)
 55
 DROP TABLE t1;
+#
+# Bug #777654: empty subselect in FROM clause returning  
+#              SUM(DISTINCT) over non-nullable field 
+#
+CREATE TABLE t1 (a int NOT NULL) ;
+SELECT SUM(DISTINCT a) FROM t1;
+SUM(DISTINCT a)
+NULL
+SELECT * FROM (SELECT SUM(DISTINCT a) FROM t1) AS t;
+SUM(DISTINCT a)
+NULL
+DROP TABLE t1;
diff --git a/mysql-test/r/update.result b/mysql-test/r/update.result
index 54170ae3dad..427374fd995 100644
--- a/mysql-test/r/update.result
+++ b/mysql-test/r/update.result
@@ -277,6 +277,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 update t1 set a=9999 order by a limit 1;
@@ -289,6 +290,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	2
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	9
 flush status;
 delete from t1 order by a limit 1;
@@ -300,6 +302,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 delete from t1 order by a desc limit 1;
@@ -311,6 +314,7 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 alter table t1 disable keys;
 flush status;
@@ -323,7 +327,8 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	1
-Handler_read_rnd_next	9
+Handler_read_rnd_deleted	2
+Handler_read_rnd_next	7
 select * from t1;
 a	b
 0	0
@@ -377,6 +382,7 @@ Handler_read_last	0
 Handler_read_next	1
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 drop table t1, t2;
 create table t1(f1 int, `*f2` int);
@@ -415,6 +421,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 SELECT user_id FROM t1 WHERE request_id=999999999999999999999999999999;
 user_id
@@ -426,6 +433,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 UPDATE t1 SET user_id=null WHERE request_id=9999999999999;
 show status like '%Handler_read%';
@@ -436,6 +444,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 UPDATE t1 SET user_id=null WHERE request_id=999999999999999999999999999999;
 show status like '%Handler_read%';
@@ -446,6 +455,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 DROP TABLE t1;
 CREATE TABLE t1 (
diff --git a/mysql-test/r/view.result b/mysql-test/r/view.result
index f2d3820ff58..9b6ae60b3b5 100644
--- a/mysql-test/r/view.result
+++ b/mysql-test/r/view.result
@@ -304,7 +304,7 @@ a+1
 4
 explain select * from v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
 2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	4	Using filesort
 drop view v1;
 drop table t1;
@@ -4045,6 +4045,63 @@ drop table t1,t2;
 # -- End of 5.1 tests.
 # -----------------------------------------------------------------
 #
+# Bug #794005: crash in st_table::mark_virtual_columns_for_write
+#
+CREATE TABLE t1 (a int);
+insert into t1 values (1);
+CREATE TABLE t2 (a int);
+insert into t2 values (1);
+CREATE VIEW v2 AS SELECT * FROM t2;
+CREATE VIEW v1 AS SELECT * FROM v2;
+CREATE VIEW v3 AS SELECT t2.a,v1.a as b FROM t2,v1 where t2.a=v1.a;
+CREATE OR REPLACE ALGORITHM = TEMPTABLE VIEW v2 AS SELECT * FROM t1;
+UPDATE v1 SET a = 10;
+ERROR HY000: The target table v1 of the UPDATE is not updatable
+REPLACE v1 SET a = 10;
+ERROR HY000: The target table v1 of the INSERT is not insertable-into
+INSERT into v1 values (20);
+ERROR HY000: The target table v1 of the INSERT is not insertable-into
+DELETE from v1;
+ERROR HY000: The target table v1 of the DELETE is not updatable
+UPDATE v3 SET b= 10;
+ERROR HY000: The target table v2 of the UPDATE is not updatable
+REPLACE v3 SET b= 10;
+ERROR HY000: The target table v3 of the INSERT is not insertable-into
+INSERT into v3(b) values (20);
+ERROR HY000: The target table v3 of the INSERT is not insertable-into
+DELETE from v3 where b=20;
+ERROR HY000: Can not delete from join view 'test.v3'
+DELETE from v3 where a=20;
+ERROR HY000: Can not delete from join view 'test.v3'
+DELETE v1 from v1,t1 where v1.a=t1.a;
+ERROR HY000: The target table v1 of the DELETE is not updatable
+UPDATE v3 SET a = 10;
+REPLACE v3 SET a = 11;
+INSERT INTO v3(a) values (20);
+select * from t1;
+a
+1
+select * from t2;
+a
+10
+11
+20
+CREATE OR REPLACE ALGORITHM = MERGE VIEW v2 AS SELECT * FROM t2;
+DELETE from v1 where a=11;
+DELETE v1 from v1,t1 where v1.a=t1.a;
+select * from t1;
+a
+1
+select * from t2;
+a
+10
+20
+DROP VIEW v1,v2,v3;
+DROP TABLE t1,t2;
+# -----------------------------------------------------------------
+# -- End of 5.2 tests.
+# -----------------------------------------------------------------
+#
 # Bug #59696 Optimizer does not use equalities for conditions over view 
 #
 CREATE TABLE t1 (a int NOT NULL);
@@ -4075,6 +4132,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 CREATE VIEW v AS SELECT * FROM t2;
 EXPLAIN EXTENDED
@@ -4097,6 +4155,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	17
 DROP VIEW v;
 DROP TABLE t1, t2;
@@ -4569,4 +4628,7 @@ NULL	NULL	1	0
 NULL	NULL	1	0
 DROP VIEW v2;
 DROP TABLE t1, t2, t3;
+# -----------------------------------------------------------------
+# -- End of 5.3 tests.
+# -----------------------------------------------------------------
 SET optimizer_switch=@save_optimizer_switch;
diff --git a/mysql-test/suite/maria/r/maria-gis-recovery.result b/mysql-test/suite/maria/r/maria-gis-recovery.result
new file mode 100644
index 00000000000..d1088dd1ba0
--- /dev/null
+++ b/mysql-test/suite/maria/r/maria-gis-recovery.result
@@ -0,0 +1,66 @@
+set global aria_log_file_size=4294967295;
+Warnings:
+Warning	1292	Truncated incorrect aria_log_file_size value: '4294967295'
+drop database if exists mysqltest;
+create database mysqltest;
+use mysqltest;
+* shut down mysqld, removed logs, restarted it
+CREATE TABLE t1 (
+i int,
+shape GEOMETRY NOT NULL,
+SPATIAL (shape)
+) ENGINE=ARIA;
+insert into t1 values(1,POINT(1, 1));
+* copied t1 for feeding_recovery
+insert into t1 values(2,POINT(2, 2)), (3,POINT(3, 3)), (4,POINT(4, 4));
+flush table t1;
+* copied t1 for comparison
+SET SESSION debug_dbug="+d,maria_flush_whole_log,maria_crash";
+* crashing mysqld intentionally
+set global aria_checkpoint_interval=1;
+ERROR HY000: Lost connection to MySQL server during query
+* copied t1 back for feeding_recovery
+* recovery happens
+check table t1 extended;
+Table	Op	Msg_type	Msg_text
+mysqltest.t1	check	status	OK
+* testing that checksum after recovery is as expected
+Checksum-check
+ok
+use mysqltest;
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `i` int(11) DEFAULT NULL,
+  `shape` geometry NOT NULL,
+  SPATIAL KEY `shape` (`shape`)
+) ENGINE=Aria DEFAULT CHARSET=latin1 PAGE_CHECKSUM=1
+* TEST of UPDATE vs state.auto_increment
+* copied t1 for feeding_recovery
+update t1 set shape=POINT(5, 5) where i=2;
+flush table t1;
+* copied t1 for comparison
+SET SESSION debug_dbug="+d,maria_flush_whole_log,maria_crash";
+* crashing mysqld intentionally
+set global aria_checkpoint_interval=1;
+ERROR HY000: Lost connection to MySQL server during query
+* copied t1 back for feeding_recovery
+* recovery happens
+check table t1 extended;
+Table	Op	Msg_type	Msg_text
+mysqltest.t1	check	status	OK
+* testing that checksum after recovery is as expected
+Checksum-check
+ok
+use mysqltest;
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `i` int(11) DEFAULT NULL,
+  `shape` geometry NOT NULL,
+  SPATIAL KEY `shape` (`shape`)
+) ENGINE=Aria DEFAULT CHARSET=latin1 PAGE_CHECKSUM=1
+drop table t1;
+drop database mysqltest_for_feeding_recovery;
+drop database mysqltest_for_comparison;
+drop database mysqltest;
diff --git a/mysql-test/suite/maria/t/maria-gis-recovery.opt b/mysql-test/suite/maria/t/maria-gis-recovery.opt
new file mode 100644
index 00000000000..58d0d012c54
--- /dev/null
+++ b/mysql-test/suite/maria/t/maria-gis-recovery.opt
@@ -0,0 +1 @@
+--skip-stack-trace --skip-core-file --loose-aria-log-dir-path=$MYSQLTEST_VARDIR/tmp
diff --git a/mysql-test/suite/maria/t/maria-gis-recovery.test b/mysql-test/suite/maria/t/maria-gis-recovery.test
new file mode 100644
index 00000000000..c40cc3788de
--- /dev/null
+++ b/mysql-test/suite/maria/t/maria-gis-recovery.test
@@ -0,0 +1,64 @@
+--source include/not_embedded.inc
+# Don't test this under valgrind, memory leaks will occur as we crash
+--source include/not_valgrind.inc
+# Binary must be compiled with debug for crash to occur
+--source include/have_debug.inc
+--source include/have_maria.inc
+--source include/have_geometry.inc
+
+set global aria_log_file_size=4294967295;
+let $MARIA_LOG=../../tmp;
+
+--disable_warnings
+drop database if exists mysqltest;
+--enable_warnings
+create database mysqltest;
+let $mms_tname=t;
+
+# Include scripts can perform SQL. For it to not influence the main test
+# they use a separate connection. This way if they use a DDL it would
+# not autocommit in the main test.
+connect (admin, localhost, root,,mysqltest,,);
+--enable_reconnect
+
+connection default;
+use mysqltest;
+--enable_reconnect
+
+-- source include/maria_empty_logs.inc
+let $mms_tables=1;
+CREATE TABLE t1 (
+  i int,
+  shape GEOMETRY NOT NULL,
+  SPATIAL (shape)
+) ENGINE=ARIA;
+insert into t1 values(1,POINT(1, 1));
+-- source include/maria_make_snapshot_for_feeding_recovery.inc
+insert into t1 values(2,POINT(2, 2)), (3,POINT(3, 3)), (4,POINT(4, 4));
+-- source include/maria_make_snapshot_for_comparison.inc
+let $mvr_restore_old_snapshot=1;
+let $mms_compare_physically=0;
+let $mvr_debug_option="+d,maria_flush_whole_log,maria_crash";
+let $mvr_crash_statement= set global aria_checkpoint_interval=1;
+-- source include/maria_verify_recovery.inc
+show create table t1;
+
+# Test that UPDATE's effect on auto-increment is recovered
+--echo * TEST of UPDATE vs state.auto_increment
+-- source include/maria_make_snapshot_for_feeding_recovery.inc
+update t1 set shape=POINT(5, 5) where i=2;
+-- source include/maria_make_snapshot_for_comparison.inc
+let $mvr_restore_old_snapshot=1;
+let $mms_compare_physically=0;
+let $mvr_debug_option="+d,maria_flush_whole_log,maria_crash";
+let $mvr_crash_statement= set global aria_checkpoint_interval=1;
+-- source include/maria_verify_recovery.inc
+show create table t1;
+drop table t1;
+
+# clean up everything
+let $mms_purpose=feeding_recovery;
+eval drop database mysqltest_for_$mms_purpose;
+let $mms_purpose=comparison;
+eval drop database mysqltest_for_$mms_purpose;
+drop database mysqltest;
diff --git a/mysql-test/suite/pbxt/r/heap.result.THIS b/mysql-test/suite/pbxt/r/heap.result.THIS
deleted file mode 100644
index 0404e8b98f9..00000000000
--- a/mysql-test/suite/pbxt/r/heap.result.THIS
+++ /dev/null
@@ -1,733 +0,0 @@
-drop table if exists t1,t2,t3;
-create table t1 (a int not null,b int not null, primary key (a)) engine=heap comment="testing heaps" avg_row_length=100 min_rows=1 max_rows=100;
-insert into t1 values(1,1),(2,2),(3,3),(4,4);
-delete from t1 where a=1 or a=0;
-show keys from t1;
-Table	Non_unique	Key_name	Seq_in_index	Column_name	Collation	Cardinality	Sub_part	Packed	Null	Index_type	Comment	Index_comment
-t1	0	PRIMARY	1	a	NULL	3	NULL	NULL		HASH		
-select * from t1;
-a	b
-2	2
-3	3
-4	4
-select * from t1 where a=4;
-a	b
-4	4
-update t1 set b=5 where a=4;
-update t1 set b=b+1 where a>=3;
-replace t1 values (3,3);
-select * from t1;
-a	b
-2	2
-3	3
-4	6
-alter table t1 add c int not null, add key (c,a);
-drop table t1;
-create table t1 (a int not null,b int not null, primary key (a)) engine=memory comment="testing heaps";
-insert into t1 values(1,1),(2,2),(3,3),(4,4);
-delete from t1 where a > 0;
-select * from t1;
-a	b
-drop table t1;
-create table t1 (a int not null,b int not null, primary key (a)) engine=heap comment="testing heaps";
-insert into t1 values(1,1),(2,2),(3,3),(4,4);
-alter table t1 modify a int not null auto_increment, engine=myisam, comment="new myisam table";
-select * from t1;
-a	b
-1	1
-2	2
-3	3
-4	4
-drop table t1;
-create table t1 (a int not null) engine=heap;
-insert into t1 values (869751),(736494),(226312),(802616),(728912);
-select * from t1 where a > 736494;
-a
-869751
-802616
-alter table t1 add unique uniq_id(a);
-select * from t1 where a > 736494;
-a
-869751
-802616
-select * from t1 where a = 736494;
-a
-736494
-select * from t1 where a=869751 or a=736494;
-a
-736494
-869751
-select * from t1 where a in (869751,736494,226312,802616);
-a
-226312
-736494
-802616
-869751
-alter table t1 engine=myisam;
-explain select * from t1 where a in (869751,736494,226312,802616);
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	uniq_id	uniq_id	4	NULL	4	Using where; Using index
-drop table t1;
-create table t1 (x int not null, y int not null, key x (x), unique y (y))
-engine=heap;
-insert into t1 values (1,1),(2,2),(1,3),(2,4),(2,5),(2,6);
-select * from t1 where x=1;
-x	y
-1	3
-1	1
-select * from t1,t1 as t2 where t1.x=t2.y;
-x	y	x	y
-1	1	1	1
-2	2	2	2
-1	3	1	1
-2	4	2	2
-2	5	2	2
-2	6	2	2
-explain select * from t1,t1 as t2 where t1.x=t2.y;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	x	NULL	NULL	NULL	6	
-1	SIMPLE	t2	eq_ref	y	y	4	test.t1.x	1	
-drop table t1;
-create table t1 (a int) engine=heap;
-insert into t1 values(1);
-select max(a) from t1;
-max(a)
-1
-drop table t1;
-CREATE TABLE t1 ( a int not null default 0, b int not null default 0,  key(a),  key(b)  ) ENGINE=HEAP;
-insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
-select * from t1 where a=1;
-a	b
-1	6
-1	5
-1	4
-1	3
-1	2
-1	1
-insert into t1 values(1,1),(1,2),(2,3),(1,3),(1,4),(1,5),(1,6);
-select * from t1 where a=1;
-a	b
-1	6
-1	5
-1	4
-1	3
-1	2
-1	1
-1	6
-1	5
-1	4
-1	3
-1	2
-1	1
-drop table t1;
-create table t1 (id int unsigned not null, primary key (id)) engine=HEAP;
-insert into t1 values(1);
-select max(id) from t1;
-max(id)
-1
-insert into t1 values(2);
-select max(id) from t1;
-max(id)
-2
-replace into t1 values(1);
-drop table t1;
-create table t1 (n int) engine=heap;
-drop table t1;
-create table t1 (n int) engine=heap;
-drop table if exists t1;
-CREATE table t1(f1 int not null,f2 char(20) not 
-null,index(f2)) engine=heap;
-INSERT into t1 set f1=12,f2="bill";
-INSERT into t1 set f1=13,f2="bill";
-INSERT into t1 set f1=14,f2="bill";
-INSERT into t1 set f1=15,f2="bill";
-INSERT into t1 set f1=16,f2="ted";
-INSERT into t1 set f1=12,f2="ted";
-INSERT into t1 set f1=12,f2="ted";
-INSERT into t1 set f1=12,f2="ted";
-INSERT into t1 set f1=12,f2="ted";
-delete from t1 where f2="bill";
-select * from t1;
-f1	f2
-16	ted
-12	ted
-12	ted
-12	ted
-12	ted
-drop table t1;
-create table t1 (btn char(10) not null, key(btn)) engine=heap;
-insert into t1 values ("hello"),("hello"),("hello"),("hello"),("hello"),("a"),("b"),("c"),("d"),("e"),("f"),("g"),("h"),("i");
-explain select * from t1 where btn like "q%";
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	btn	NULL	NULL	NULL	14	Using where
-select * from t1 where btn like "q%";
-btn
-alter table t1 add column new_col char(1) not null, add key (btn,new_col), drop key btn;
-update t1 set new_col=left(btn,1);
-explain select * from t1 where btn="a";
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	btn	NULL	NULL	NULL	14	Using where
-explain select * from t1 where btn="a" and new_col="a";
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	btn	btn	11	const,const	2	Using where
-drop table t1;
-CREATE TABLE t1 (
-a int default NULL,
-b int default NULL,
-KEY a (a),
-UNIQUE b (b)
-) engine=heap;
-INSERT INTO t1 VALUES (NULL,99),(99,NULL),(1,1),(2,2),(1,3);
-SELECT * FROM t1 WHERE a=NULL;
-a	b
-explain SELECT * FROM t1 WHERE a IS NULL;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	a	a	5	const	2	Using where
-SELECT * FROM t1 WHERE a<=>NULL;
-a	b
-NULL	99
-SELECT * FROM t1 WHERE b=NULL;
-a	b
-explain SELECT * FROM t1 WHERE b IS NULL;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	b	b	5	const	1	Using where
-SELECT * FROM t1 WHERE b<=>NULL;
-a	b
-99	NULL
-INSERT INTO t1 VALUES (1,3);
-ERROR 23000: Duplicate entry '3' for key 'b'
-DROP TABLE t1;
-CREATE TABLE t1 (
-a int default NULL,
-key a (a)
-) ENGINE=HEAP;
-INSERT INTO t1 VALUES (10), (10), (10);
-EXPLAIN SELECT * FROM t1 WHERE a=10;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	a	a	5	const	3	
-SELECT * FROM t1 WHERE a=10;
-a
-10
-10
-10
-DROP TABLE t1;
-CREATE TABLE t1 (a int not null, primary key(a)) engine=heap;
-INSERT into t1 values (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11);
-DELETE from t1 where a < 100;
-SELECT * from t1;
-a
-DROP TABLE t1;
-CREATE TABLE `job_titles` (
-`job_title_id` int(6) unsigned NOT NULL default '0',
-`job_title` char(18) NOT NULL default '',
-PRIMARY KEY  (`job_title_id`),
-UNIQUE KEY `job_title_id` (`job_title_id`,`job_title`)
-) ENGINE=HEAP;
-SELECT MAX(job_title_id) FROM job_titles;
-MAX(job_title_id)
-NULL
-DROP TABLE job_titles;
-CREATE TABLE t1 (a INT NOT NULL, B INT, KEY(B)) ENGINE=HEAP;
-INSERT INTO t1 VALUES(1,1), (1,NULL);
-SELECT * FROM t1 WHERE B is not null;
-a	B
-1	1
-DROP TABLE t1;
-CREATE TABLE t1 (pseudo char(35) PRIMARY KEY, date int(10) unsigned NOT NULL) ENGINE=HEAP;
-INSERT INTO t1 VALUES ('massecot',1101106491),('altec',1101106492),('stitch+',1101106304),('Seb Corgan',1101106305),('beerfilou',1101106263),('flaker',1101106529),('joce8',5),('M4vrick',1101106418),('gabay008',1101106525),('Vamp irX',1101106291),('ZoomZip',1101106546),('rip666',1101106502),('CBP ',1101106397),('guezpard',1101106496);
-DELETE FROM t1 WHERE date<1101106546;
-SELECT * FROM t1;
-pseudo	date
-ZoomZip	1101106546
-DROP TABLE t1;
-create table t1(a char(2)) engine=memory;
-insert into t1 values (NULL), (NULL);
-delete from t1 where a is null;
-insert into t1 values ('2'), ('3');
-select * from t1;
-a
-3
-2
-drop table t1;
-set storage_engine=HEAP;
-create table t1 (v varchar(10), c char(10), t varchar(50));
-insert into t1 values('+ ', '+ ', '+ ');
-set @a=repeat(' ',20);
-insert into t1 values (concat('+',@a),concat('+',@a),concat('+',@a));
-Warnings:
-Note	1265	Data truncated for column 'v' at row 1
-select concat('*',v,'*',c,'*',t,'*') from t1;
-concat('*',v,'*',c,'*',t,'*')
-*+ *+*+ *
-*+         *+*+                    *
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` varchar(10) DEFAULT NULL,
-  `c` char(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-create table t2 like t1;
-show create table t2;
-Table	Create Table
-t2	CREATE TABLE `t2` (
-  `v` varchar(10) DEFAULT NULL,
-  `c` char(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-create table t3 select * from t1;
-show create table t3;
-Table	Create Table
-t3	CREATE TABLE `t3` (
-  `v` varchar(10) DEFAULT NULL,
-  `c` char(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-alter table t1 modify c varchar(10);
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` varchar(10) DEFAULT NULL,
-  `c` varchar(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-alter table t1 modify v char(10);
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` char(10) DEFAULT NULL,
-  `c` varchar(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-alter table t1 modify t varchar(10);
-Warnings:
-Warning	1265	Data truncated for column 't' at row 2
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` char(10) DEFAULT NULL,
-  `c` varchar(10) DEFAULT NULL,
-  `t` varchar(10) DEFAULT NULL
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-select concat('*',v,'*',c,'*',t,'*') from t1;
-concat('*',v,'*',c,'*',t,'*')
-*+*+*+ *
-*+*+*+         *
-drop table t1,t2,t3;
-create table t1 (v varchar(10), c char(10), t varchar(50), key(v), key(c), key(t(10)));
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` varchar(10) DEFAULT NULL,
-  `c` char(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL,
-  KEY `v` (`v`),
-  KEY `c` (`c`),
-  KEY `t` (`t`(10))
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-select count(*) from t1;
-count(*)
-270
-insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1)));
-select count(*) from t1 where v='a';
-count(*)
-10
-select count(*) from t1 where c='a';
-count(*)
-10
-select count(*) from t1 where t='a';
-count(*)
-10
-select count(*) from t1 where v='a  ';
-count(*)
-10
-select count(*) from t1 where c='a  ';
-count(*)
-10
-select count(*) from t1 where t='a  ';
-count(*)
-10
-select count(*) from t1 where v between 'a' and 'a ';
-count(*)
-10
-select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
-count(*)
-10
-select count(*) from t1 where v like 'a%';
-count(*)
-11
-select count(*) from t1 where c like 'a%';
-count(*)
-11
-select count(*) from t1 where t like 'a%';
-count(*)
-11
-select count(*) from t1 where v like 'a %';
-count(*)
-9
-explain select count(*) from t1 where v='a  ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	10	Using where
-explain select count(*) from t1 where c='a  ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	c	c	11	const	10	Using where
-explain select count(*) from t1 where t='a  ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	t	t	13	const	10	Using where
-explain select count(*) from t1 where v like 'a%';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	v	NULL	NULL	NULL	271	Using where
-explain select count(*) from t1 where v between 'a' and 'a ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	10	Using where
-explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	10	Using where
-alter table t1 add unique(v);
-ERROR 23000: Duplicate entry '{ ' for key 'v_2'
-select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a' order by length(concat('*',v,'*',c,'*',t,'*'));
-qq
-*a*a*a*
-*a *a*a *
-*a  *a*a  *
-*a   *a*a   *
-*a    *a*a    *
-*a     *a*a     *
-*a      *a*a      *
-*a       *a*a       *
-*a        *a*a        *
-*a         *a*a         *
-explain select * from t1 where v='a';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	10	Using where
-select v,count(*) from t1 group by v limit 10;
-v	count(*)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select v,count(t) from t1 group by v limit 10;
-v	count(t)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select v,count(c) from t1 group by v limit 10;
-v	count(c)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select sql_big_result trim(v),count(t) from t1 group by v limit 10;
-trim(v)	count(t)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select sql_big_result trim(v),count(c) from t1 group by v limit 10;
-trim(v)	count(c)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select c,count(*) from t1 group by c limit 10;
-c	count(*)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select c,count(t) from t1 group by c limit 10;
-c	count(t)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select sql_big_result c,count(t) from t1 group by c limit 10;
-c	count(t)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select t,count(*) from t1 group by t limit 10;
-t	count(*)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select t,count(t) from t1 group by t limit 10;
-t	count(t)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-select sql_big_result trim(t),count(t) from t1 group by t limit 10;
-trim(t)	count(t)
-a
	1
-a	10
-b	10
-c	10
-d	10
-e	10
-f	10
-g	10
-h	10
-i	10
-drop table t1;
-create table t1 (a char(10), unique (a));
-insert into t1 values ('a');
-insert into t1 values ('a ');
-ERROR 23000: Duplicate entry 'a' for key 'a'
-alter table t1 modify a varchar(10);
-insert into t1 values ('a '),('a  '),('a   '),('a         ');
-ERROR 23000: Duplicate entry 'a ' for key 'a'
-insert into t1 values ('a     ');
-ERROR 23000: Duplicate entry 'a     ' for key 'a'
-insert into t1 values ('a          ');
-ERROR 23000: Duplicate entry 'a         ' for key 'a'
-insert into t1 values ('a ');
-ERROR 23000: Duplicate entry 'a ' for key 'a'
-update t1 set a='a      ' where a like 'a ';
-update t1 set a='a  ' where a like 'a      ';
-drop table t1;
-create table t1 (v varchar(10), c char(10), t varchar(50), key using btree (v), key using btree (c), key using btree (t(10)));
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` varchar(10) DEFAULT NULL,
-  `c` char(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL,
-  KEY `v` (`v`) USING BTREE,
-  KEY `c` (`c`) USING BTREE,
-  KEY `t` (`t`(10)) USING BTREE
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-select count(*) from t1;
-count(*)
-270
-insert into t1 values(concat('a',char(1)),concat('a',char(1)),concat('a',char(1)));
-select count(*) from t1 where v='a';
-count(*)
-10
-select count(*) from t1 where c='a';
-count(*)
-10
-select count(*) from t1 where t='a';
-count(*)
-10
-select count(*) from t1 where v='a  ';
-count(*)
-10
-select count(*) from t1 where c='a  ';
-count(*)
-10
-select count(*) from t1 where t='a  ';
-count(*)
-10
-select count(*) from t1 where v between 'a' and 'a ';
-count(*)
-10
-select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
-count(*)
-10
-explain select count(*) from t1 where v='a  ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	#	Using where
-explain select count(*) from t1 where c='a  ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	c	c	11	const	#	Using where
-explain select count(*) from t1 where t='a  ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	t	t	13	const	#	Using where
-explain select count(*) from t1 where v like 'a%';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	range	v	v	13	NULL	#	Using where
-explain select count(*) from t1 where v between 'a' and 'a ';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	#	Using where
-explain select count(*) from t1 where v between 'a' and 'a ' and v between 'a  ' and 'b\n';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	#	Using where
-alter table t1 add unique(v);
-ERROR 23000: Duplicate entry '{ ' for key 'v_2'
-select concat('*',v,'*',c,'*',t,'*') as qq from t1 where v='a' order by length(concat('*',v,'*',c,'*',t,'*'));
-qq
-*a*a*a*
-*a *a*a *
-*a  *a*a  *
-*a   *a*a   *
-*a    *a*a    *
-*a     *a*a     *
-*a      *a*a      *
-*a       *a*a       *
-*a        *a*a        *
-*a         *a*a         *
-explain select * from t1 where v='a';
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ref	v	v	13	const	#	Using where
-drop table t1;
-create table t1 (a char(10), unique using btree (a)) engine=heap;
-insert into t1 values ('a');
-insert into t1 values ('a ');
-ERROR 23000: Duplicate entry 'a' for key 'a'
-alter table t1 modify a varchar(10);
-insert into t1 values ('a '),('a  '),('a   '),('a         ');
-ERROR 23000: Duplicate entry 'a ' for key 'a'
-insert into t1 values ('a     ');
-ERROR 23000: Duplicate entry 'a     ' for key 'a'
-insert into t1 values ('a          ');
-ERROR 23000: Duplicate entry 'a         ' for key 'a'
-insert into t1 values ('a ');
-ERROR 23000: Duplicate entry 'a ' for key 'a'
-update t1 set a='a      ' where a like 'a ';
-update t1 set a='a  ' where a like 'a      ';
-drop table t1;
-create table t1 (v varchar(10), c char(10), t varchar(50), key(v(5)), key(c(5)), key(t(5)));
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` varchar(10) DEFAULT NULL,
-  `c` char(10) DEFAULT NULL,
-  `t` varchar(50) DEFAULT NULL,
-  KEY `v` (`v`(5)),
-  KEY `c` (`c`(5)),
-  KEY `t` (`t`(5))
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-drop table t1;
-create table t1 (v varchar(65530), key(v(10)));
-show create table t1;
-Table	Create Table
-t1	CREATE TABLE `t1` (
-  `v` varchar(65530) DEFAULT NULL,
-  KEY `v` (`v`(10))
-) ENGINE=MEMORY DEFAULT CHARSET=latin1
-insert into t1 values(repeat('a',65530));
-select length(v) from t1 where v=repeat('a',65530);
-length(v)
-65530
-drop table t1;
-set storage_engine=PBXT;
-create table t1 (a bigint unsigned auto_increment primary key, b int,
-key (b, a)) engine=heap;
-insert t1 (b) values (1),(1),(1),(1),(1),(1),(1),(1);
-select * from t1;
-a	b
-1	1
-2	1
-3	1
-4	1
-5	1
-6	1
-7	1
-8	1
-drop table t1;
-create table t1 (a int not null, b int not null auto_increment,
-primary key(a, b), key(b)) engine=heap;
-insert t1 (a) values (1),(1),(1),(1),(1),(1),(1),(1);
-select * from t1;
-a	b
-1	1
-1	2
-1	3
-1	4
-1	5
-1	6
-1	7
-1	8
-drop table t1;
-create table t1 (a int not null, b int not null auto_increment,
-primary key(a, b)) engine=heap;
-ERROR 42000: Incorrect table definition; there can be only one auto column and it must be defined as a key
-create table t1 (c char(255), primary key(c(90)));
-insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
-insert into t1 values ("abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz");
-ERROR 23000: Duplicate entry 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijkl' for key 'PRIMARY'
-drop table t1;
-CREATE TABLE t1 (a int, key(a)) engine=heap;
-insert into t1 values (0);
-delete from t1;
-select * from t1;
-a
-insert into t1 values (0), (1);
-select * from t1 where a = 0;
-a
-0
-drop table t1;
-create table t1 (c char(10)) engine=memory;
-create table t2 (c varchar(10)) engine=memory;
-show table status like 't_';
-Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	MEMORY	10	Fixed	0	11	0	#	0	0	NULL	#	NULL	NULL	latin1_swedish_ci	NULL		
-t2	MEMORY	10	Fixed	0	12	0	#	0	0	NULL	#	NULL	NULL	latin1_swedish_ci	NULL		
-drop table t1, t2;
-CREATE TABLE t1(a VARCHAR(1), b VARCHAR(2), c VARCHAR(256),
-KEY(a), KEY(b), KEY(c)) ENGINE=MEMORY;
-INSERT INTO t1 VALUES('a','aa',REPEAT('a', 256)),('a','aa',REPEAT('a',256));
-SELECT COUNT(*) FROM t1 WHERE a='a';
-COUNT(*)
-2
-SELECT COUNT(*) FROM t1 WHERE b='aa';
-COUNT(*)
-2
-SELECT COUNT(*) FROM t1 WHERE c=REPEAT('a',256);
-COUNT(*)
-2
-DROP TABLE t1;
diff --git a/mysql-test/suite/pbxt/r/null_key.result b/mysql-test/suite/pbxt/r/null_key.result
index 7ef554af946..a997cf913c9 100644
--- a/mysql-test/suite/pbxt/r/null_key.result
+++ b/mysql-test/suite/pbxt/r/null_key.result
@@ -428,5 +428,6 @@ Handler_read_last	0
 Handler_read_next	2
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	5
 DROP TABLE t1,t2,t3,t4;
diff --git a/mysql-test/suite/pbxt/r/ps_11bugs.result b/mysql-test/suite/pbxt/r/ps_11bugs.result
index dd09e9d14f3..5a2743436e1 100644
--- a/mysql-test/suite/pbxt/r/ps_11bugs.result
+++ b/mysql-test/suite/pbxt/r/ps_11bugs.result
@@ -121,8 +121,8 @@ insert into t1 values (1);
 explain select * from t1 where 3 in (select (1+1) union select 1);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	index	NULL	PRIMARY	4	NULL	1	Using index
-2	DEPENDENT SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
-3	DEPENDENT UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+3	UNION	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
 NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
 select * from t1 where 3 in (select (1+1) union select 1);
 a
diff --git a/mysql-test/suite/pbxt/r/select.result b/mysql-test/suite/pbxt/r/select.result
index a3ed13f3de0..18ffdd30abe 100644
--- a/mysql-test/suite/pbxt/r/select.result
+++ b/mysql-test/suite/pbxt/r/select.result
@@ -2789,10 +2789,10 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
 explain select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	index	key1	key1	5	NULL	4	Using where; Using index
 explain select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Select tables optimized away
+1	SIMPLE	t1	index	key1	key1	5	NULL	4	Using where; Using index
 select max(key1) from t1 where key1 <= 0.6158;
 max(key1)
 0.6158000230789185
@@ -2811,10 +2811,18 @@ max(key1)	min(key2)
 0.6158000230789185	1.3761999607086182
 select max(key1) from t1 where key1 <= 0.6158 and rand() + 0.5 >= 0.5;
 max(key1)
+<<<<<<< TREE
 0.6158000230789185
+=======
+0.384499996900558
+>>>>>>> MERGE-SOURCE
 select min(key1) from t1 where key1 >= 0.3762 and rand() + 0.5 >= 0.5;
 min(key1)
+<<<<<<< TREE
 0.37619999051094055
+=======
+0.384499996900558
+>>>>>>> MERGE-SOURCE
 DROP TABLE t1,t2;
 CREATE TABLE t1 (i BIGINT UNSIGNED NOT NULL);
 INSERT INTO t1 VALUES (10);
diff --git a/mysql-test/suite/pbxt/r/update.result b/mysql-test/suite/pbxt/r/update.result
index 13d50071bfd..83b284b794d 100644
--- a/mysql-test/suite/pbxt/r/update.result
+++ b/mysql-test/suite/pbxt/r/update.result
@@ -277,6 +277,7 @@ Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	0
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 flush status;
 update t1 set a=9999 order by a limit 1;
@@ -292,6 +293,21 @@ Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	0
 Handler_read_rnd	2
+<<<<<<< TREE
+=======
+Handler_read_rnd_deleted	0
+Handler_read_rnd_next	18
+flush status;
+delete from t1 order by a limit 1;
+show status like 'handler_read%';
+Variable_name	Value
+Handler_read_first	0
+Handler_read_key	0
+Handler_read_next	0
+Handler_read_prev	0
+Handler_read_rnd	1
+Handler_read_rnd_deleted	0
+>>>>>>> MERGE-SOURCE
 Handler_read_rnd_next	9
 flush status;
 delete from t1 order by a limit 1;
@@ -313,8 +329,14 @@ Handler_read_key	0
 Handler_read_last	1
 Handler_read_next	0
 Handler_read_prev	0
+<<<<<<< TREE
 Handler_read_rnd	0
 Handler_read_rnd_next	0
+=======
+Handler_read_rnd	1
+Handler_read_rnd_deleted	0
+Handler_read_rnd_next	8
+>>>>>>> MERGE-SOURCE
 alter table t1 disable keys;
 Warnings:
 Note	1031	Table storage engine for 't1' doesn't have this option
@@ -327,8 +349,14 @@ Handler_read_key	0
 Handler_read_last	0
 Handler_read_next	0
 Handler_read_prev	0
+<<<<<<< TREE
 Handler_read_rnd	0
 Handler_read_rnd_next	0
+=======
+Handler_read_rnd	1
+Handler_read_rnd_deleted	0
+Handler_read_rnd_next	7
+>>>>>>> MERGE-SOURCE
 select * from t1;
 a	b
 0	0
@@ -382,6 +410,7 @@ Handler_read_last	0
 Handler_read_next	1
 Handler_read_prev	0
 Handler_read_rnd	1
+Handler_read_rnd_deleted	0
 Handler_read_rnd_next	0
 drop table t1, t2;
 create table t1(f1 int, `*f2` int);
diff --git a/mysql-test/suite/pbxt/r/view_grant.result.THIS b/mysql-test/suite/pbxt/r/view_grant.result.THIS
deleted file mode 100644
index cef441efc77..00000000000
--- a/mysql-test/suite/pbxt/r/view_grant.result.THIS
+++ /dev/null
@@ -1,959 +0,0 @@
-drop database if exists mysqltest;
-drop view if exists v1,v2,v3;
-grant create view on test.* to test@localhost;
-show grants for test@localhost;
-Grants for test@localhost
-GRANT USAGE ON *.* TO 'test'@'localhost'
-GRANT CREATE VIEW ON `test`.* TO 'test'@'localhost'
-revoke create view on test.* from test@localhost;
-show grants for test@localhost;
-Grants for test@localhost
-GRANT USAGE ON *.* TO 'test'@'localhost'
-drop user test@localhost;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int);
-create table mysqltest.t2 (a int, b int);
-grant select on mysqltest.t1 to mysqltest_1@localhost;
-grant create view,select on test.* to mysqltest_1@localhost;
-create definer=root@localhost view v1 as select * from mysqltest.t1;
-ERROR 42000: Access denied; you need (at least one of) the SUPER privilege(s) for this operation
-create view v1 as select * from mysqltest.t1;
-alter view v1 as select * from mysqltest.t1;
-ERROR 42000: DROP command denied to user 'mysqltest_1'@'localhost' for table 'v1'
-create or replace view v1 as select * from mysqltest.t1;
-ERROR 42000: DROP command denied to user 'mysqltest_1'@'localhost' for table 'v1'
-create view mysqltest.v2  as select * from mysqltest.t1;
-ERROR 42000: CREATE VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v2'
-create view v2 as select * from mysqltest.t2;
-ERROR 42000: ANY command denied to user 'mysqltest_1'@'localhost' for table 't2'
-show create view v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`mysqltest_1`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `mysqltest`.`t1`.`a` AS `a`,`mysqltest`.`t1`.`b` AS `b` from `mysqltest`.`t1`	latin1	latin1_swedish_ci
-grant create view,drop,select on test.* to mysqltest_1@localhost;
-use test;
-alter view v1 as select * from mysqltest.t1;
-create or replace view v1 as select * from mysqltest.t1;
-revoke all privileges on mysqltest.t1 from mysqltest_1@localhost;
-revoke all privileges on test.* from mysqltest_1@localhost;
-drop database mysqltest;
-drop view test.v1;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int);
-create view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1;
-grant select (c) on mysqltest.v1 to mysqltest_1@localhost;
-select c from mysqltest.v1;
-c
-select d from mysqltest.v1;
-ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for column 'd' in table 'v1'
-revoke all privileges on mysqltest.v1 from mysqltest_1@localhost;
-delete from mysql.user where user='mysqltest_1';
-drop database mysqltest;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int);
-create algorithm=temptable view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1;
-grant select (c) on mysqltest.v1 to mysqltest_1@localhost;
-select c from mysqltest.v1;
-c
-select d from mysqltest.v1;
-ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for column 'd' in table 'v1'
-revoke all privileges on mysqltest.v1 from mysqltest_1@localhost;
-delete from mysql.user where user='mysqltest_1';
-drop database mysqltest;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int);
-create table mysqltest.t2 (a int, b int);
-create view mysqltest.v1 (c,d) as select a+1,b+1 from mysqltest.t1;
-create algorithm=temptable view mysqltest.v2 (c,d) as select a+1,b+1 from mysqltest.t1;
-create view mysqltest.v3 (c,d) as select a+1,b+1 from mysqltest.t2;
-create algorithm=temptable view mysqltest.v4 (c,d) as select a+1,b+1 from mysqltest.t2;
-grant select on mysqltest.v1 to mysqltest_1@localhost;
-grant select on mysqltest.v2 to mysqltest_1@localhost;
-grant select on mysqltest.v3 to mysqltest_1@localhost;
-grant select on mysqltest.v4 to mysqltest_1@localhost;
-select c from mysqltest.v1;
-c
-select c from mysqltest.v2;
-c
-select c from mysqltest.v3;
-c
-select c from mysqltest.v4;
-c
-show columns from mysqltest.v1;
-Field	Type	Null	Key	Default	Extra
-c	bigint(12)	YES		NULL	
-d	bigint(12)	YES		NULL	
-show columns from mysqltest.v2;
-Field	Type	Null	Key	Default	Extra
-c	bigint(12)	YES		NULL	
-d	bigint(12)	YES		NULL	
-explain select c from mysqltest.v1;
-ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
-show create view mysqltest.v1;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v1'
-explain select c from mysqltest.v2;
-ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
-show create view mysqltest.v2;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v2'
-explain select c from mysqltest.v3;
-ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
-show create view mysqltest.v3;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v3'
-explain select c from mysqltest.v4;
-ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
-show create view mysqltest.v4;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v4'
-grant select on mysqltest.t1 to mysqltest_1@localhost;
-explain select c from mysqltest.v1;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	0	
-show create view mysqltest.v1;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v1'
-explain select c from mysqltest.v2;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
-2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	0	
-show create view mysqltest.v2;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v2'
-explain select c from mysqltest.v3;
-ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
-show create view mysqltest.v3;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v3'
-explain select c from mysqltest.v4;
-ERROR HY000: EXPLAIN/SHOW can not be issued; lacking privileges for underlying table
-show create view mysqltest.v4;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v4'
-grant show view on mysqltest.* to mysqltest_1@localhost;
-explain select c from mysqltest.v1;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	0	
-show create view mysqltest.v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v1` AS select (`mysqltest`.`t1`.`a` + 1) AS `c`,(`mysqltest`.`t1`.`b` + 1) AS `d` from `mysqltest`.`t1`	latin1	latin1_swedish_ci
-explain select c from mysqltest.v2;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
-2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	0	
-show create view mysqltest.v2;
-View	Create View	character_set_client	collation_connection
-v2	CREATE ALGORITHM=TEMPTABLE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v2` AS select (`mysqltest`.`t1`.`a` + 1) AS `c`,(`mysqltest`.`t1`.`b` + 1) AS `d` from `mysqltest`.`t1`	latin1	latin1_swedish_ci
-explain select c from mysqltest.v3;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	0	
-show create view mysqltest.v3;
-View	Create View	character_set_client	collation_connection
-v3	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v3` AS select (`mysqltest`.`t2`.`a` + 1) AS `c`,(`mysqltest`.`t2`.`b` + 1) AS `d` from `mysqltest`.`t2`	latin1	latin1_swedish_ci
-explain select c from mysqltest.v4;
-id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
-2	DERIVED	t2	ALL	NULL	NULL	NULL	NULL	0	
-show create view mysqltest.v4;
-View	Create View	character_set_client	collation_connection
-v4	CREATE ALGORITHM=TEMPTABLE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `mysqltest`.`v4` AS select (`mysqltest`.`t2`.`a` + 1) AS `c`,(`mysqltest`.`t2`.`b` + 1) AS `d` from `mysqltest`.`t2`	latin1	latin1_swedish_ci
-revoke all privileges on mysqltest.* from mysqltest_1@localhost;
-delete from mysql.user where user='mysqltest_1';
-drop database mysqltest;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int, primary key(a));
-insert into mysqltest.t1 values (10,2), (20,3), (30,4), (40,5), (50,10);
-create table mysqltest.t2 (x int);
-insert into mysqltest.t2 values (3), (4), (5), (6);
-create view mysqltest.v1 (a,c) as select a, b+1 from mysqltest.t1;
-create view mysqltest.v2 (a,c) as select a, b from mysqltest.t1;
-create view mysqltest.v3 (a,c) as select a, b+1 from mysqltest.t1;
-grant update (a) on mysqltest.v2 to mysqltest_1@localhost;
-grant update on mysqltest.v1 to mysqltest_1@localhost;
-grant select on mysqltest.* to mysqltest_1@localhost;
-use mysqltest;
-update t2,v1 set v1.a=v1.a+v1.c where t2.x=v1.c;
-select * from t1 order by a;
-a	b
-13	2
-24	3
-35	4
-46	5
-50	10
-update v1 set a=a+c;
-select * from t1 order by a;
-a	b
-16	2
-28	3
-40	4
-52	5
-61	10
-update t2,v2 set v2.a=v2.a+v2.c where t2.x=v2.c;
-select * from t1 order by a;
-a	b
-16	2
-31	3
-44	4
-57	5
-61	10
-update v2 set a=a+c;
-select * from t1 order by a;
-a	b
-18	2
-34	3
-48	4
-62	5
-71	10
-update t2,v2 set v2.c=v2.a+v2.c where t2.x=v2.c;
-ERROR 42000: UPDATE command denied to user 'mysqltest_1'@'localhost' for column 'c' in table 'v2'
-update v2 set c=a+c;
-ERROR 42000: UPDATE command denied to user 'mysqltest_1'@'localhost' for column 'c' in table 'v2'
-update t2,v3 set v3.a=v3.a+v3.c where t2.x=v3.c;
-ERROR 42000: UPDATE command denied to user 'mysqltest_1'@'localhost' for table 'v3'
-update v3 set a=a+c;
-ERROR 42000: UPDATE command denied to user 'mysqltest_1'@'localhost' for table 'v3'
-use test;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int, primary key(a));
-insert into mysqltest.t1 values (1,2), (2,3), (3,4), (4,5), (5,10);
-create table mysqltest.t2 (x int);
-insert into mysqltest.t2 values (3), (4), (5), (6);
-create view mysqltest.v1 (a,c) as select a, b+1 from mysqltest.t1;
-create view mysqltest.v2 (a,c) as select a, b+1 from mysqltest.t1;
-grant delete on mysqltest.v1 to mysqltest_1@localhost;
-grant select on mysqltest.* to mysqltest_1@localhost;
-use mysqltest;
-delete from v1 where c < 4;
-select * from t1;
-a	b
-2	3
-3	4
-4	5
-5	10
-delete v1 from t2,v1 where t2.x=v1.c;
-select * from t1;
-a	b
-5	10
-delete v2 from t2,v2 where t2.x=v2.c;
-ERROR 42000: DELETE command denied to user 'mysqltest_1'@'localhost' for table 'v2'
-delete from v2 where c < 4;
-ERROR 42000: DELETE command denied to user 'mysqltest_1'@'localhost' for table 'v2'
-use test;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int, primary key(a));
-insert into mysqltest.t1 values (1,2), (2,3);
-create table mysqltest.t2 (x int, y int);
-insert into mysqltest.t2 values (3,4);
-create view mysqltest.v1 (a,c) as select a, b from mysqltest.t1;
-create view mysqltest.v2 (a,c) as select a, b from mysqltest.t1;
-grant insert on mysqltest.v1 to mysqltest_1@localhost;
-grant select on mysqltest.* to mysqltest_1@localhost;
-use mysqltest;
-insert into v1 values (5,6);
-select * from t1;
-a	b
-1	2
-2	3
-5	6
-insert into v1 select x,y from t2;
-select * from t1;
-a	b
-1	2
-2	3
-5	6
-3	4
-insert into v2 values (5,6);
-ERROR 42000: INSERT command denied to user 'mysqltest_1'@'localhost' for table 'v2'
-insert into v2 select x,y from t2;
-ERROR 42000: INSERT command denied to user 'mysqltest_1'@'localhost' for table 'v2'
-use test;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int);
-create table mysqltest.t2 (a int, b int);
-grant update on mysqltest.t1 to mysqltest_1@localhost;
-grant update(b) on mysqltest.t2 to mysqltest_1@localhost;
-grant create view,update on test.* to mysqltest_1@localhost;
-create view v1 as select * from mysqltest.t1;
-create view v2 as select b from mysqltest.t2;
-create view mysqltest.v1 as select * from mysqltest.t1;
-ERROR 42000: CREATE VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v1'
-create view v3 as select a from mysqltest.t2;
-ERROR 42000: ANY command denied to user 'mysqltest_1'@'localhost' for column 'a' in table 't2'
-create table mysqltest.v3 (b int);
-grant create view on mysqltest.v3 to mysqltest_1@localhost;
-drop table mysqltest.v3;
-create view mysqltest.v3 as select b from mysqltest.t2;
-grant create view, update on mysqltest.v3 to mysqltest_1@localhost;
-drop view mysqltest.v3;
-create view mysqltest.v3 as select b from mysqltest.t2;
-create view v4 as select b+1 from mysqltest.t2;
-ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for column 'b' in table 't2'
-grant create view,update,select on test.* to mysqltest_1@localhost;
-create view v4 as select b+1 from mysqltest.t2;
-ERROR 42000: SELECT command denied to user 'mysqltest_1'@'localhost' for column 'b' in table 't2'
-grant update,select(b) on mysqltest.t2 to mysqltest_1@localhost;
-create view v4 as select b+1 from mysqltest.t2;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-drop view v1,v2,v4;
-create database mysqltest;
-create table mysqltest.t1 (a int);
-grant all privileges on mysqltest.* to mysqltest_1@localhost;
-use mysqltest;
-create view v1 as select * from t1;
-use test;
-revoke all privileges on mysqltest.* from mysqltest_1@localhost;
-drop database mysqltest;
-create database mysqltest;
-create table mysqltest.t1 (a int, b int);
-grant select on mysqltest.t1 to mysqltest_1@localhost;
-grant create view,select on test.* to mysqltest_1@localhost;
-create view v1 as select * from mysqltest.t1;
-show create view v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`mysqltest_1`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `mysqltest`.`t1`.`a` AS `a`,`mysqltest`.`t1`.`b` AS `b` from `mysqltest`.`t1`	latin1	latin1_swedish_ci
-revoke select on mysqltest.t1 from mysqltest_1@localhost;
-select * from v1;
-ERROR HY000: View 'test.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-grant select on mysqltest.t1 to mysqltest_1@localhost;
-select * from v1;
-a	b
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop view v1;
-drop database mysqltest;
-create database mysqltest;
-use mysqltest;
-create table t1 (a int);
-insert into t1 values (1);
-create table t2 (s1 int);
-drop function if exists f2;
-create function f2 () returns int begin declare v int; select s1 from t2
-into v; return v; end//
-create algorithm=TEMPTABLE view v1 as select f2() from t1;
-create algorithm=MERGE view v2 as select f2() from t1;
-create algorithm=TEMPTABLE SQL SECURITY INVOKER view v3 as select f2() from t1;
-create algorithm=MERGE SQL SECURITY INVOKER view v4 as select f2() from t1;
-create SQL SECURITY INVOKER view v5 as select * from v4;
-grant select on v1 to mysqltest_1@localhost;
-grant select on v2 to mysqltest_1@localhost;
-grant select on v3 to mysqltest_1@localhost;
-grant select on v4 to mysqltest_1@localhost;
-grant select on v5 to mysqltest_1@localhost;
-use mysqltest;
-select * from v1;
-f2()
-NULL
-Warnings:
-Warning	1329	No data - zero rows fetched, selected, or processed
-select * from v2;
-f2()
-NULL
-Warnings:
-Warning	1329	No data - zero rows fetched, selected, or processed
-select * from v3;
-ERROR HY000: View 'mysqltest.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v4;
-ERROR HY000: View 'mysqltest.v4' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v5;
-ERROR HY000: View 'mysqltest.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-use test;
-drop view v1, v2, v3, v4, v5;
-drop function f2;
-drop table t1, t2;
-use test;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-create database mysqltest;
-use mysqltest;
-create table t1 (a int);
-insert into t1 values (1);
-create table t2 (s1 int);
-drop function if exists f2;
-create function f2 () returns int begin declare v int; select s1 from t2
-into v; return v; end//
-grant select on t1 to mysqltest_1@localhost;
-grant execute on function f2 to mysqltest_1@localhost;
-grant create view on mysqltest.* to mysqltest_1@localhost;
-use mysqltest;
-create algorithm=TEMPTABLE view v1 as select f2() from t1;
-create algorithm=MERGE view v2 as select f2() from t1;
-create algorithm=TEMPTABLE SQL SECURITY INVOKER view v3 as select f2() from t1;
-create algorithm=MERGE SQL SECURITY INVOKER view v4 as select f2() from t1;
-use test;
-create view v5 as select * from v1;
-revoke execute on function f2 from mysqltest_1@localhost;
-select * from v1;
-ERROR HY000: View 'mysqltest.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v2;
-ERROR HY000: View 'mysqltest.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v3;
-f2()
-NULL
-Warnings:
-Warning	1329	No data - zero rows fetched, selected, or processed
-select * from v4;
-f2()
-NULL
-Warnings:
-Warning	1329	No data - zero rows fetched, selected, or processed
-select * from v5;
-ERROR HY000: View 'mysqltest.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-drop view v1, v2, v3, v4, v5;
-drop function f2;
-drop table t1, t2;
-use test;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-create database mysqltest;
-use mysqltest;
-create table t1 (a int);
-create table v1 (a int);
-insert into t1 values (1);
-grant select on t1 to mysqltest_1@localhost;
-grant select on v1 to mysqltest_1@localhost;
-grant create view on mysqltest.* to mysqltest_1@localhost;
-drop table v1;
-use mysqltest;
-create algorithm=TEMPTABLE view v1 as select *, a as b from t1;
-create algorithm=MERGE view v2 as select *, a as b from t1;
-create algorithm=TEMPTABLE SQL SECURITY INVOKER view v3 as select *, a as b from t1;
-create algorithm=MERGE SQL SECURITY INVOKER view v4 as select *, a as b from t1;
-create view v5 as select * from v1;
-use test;
-revoke select on t1 from mysqltest_1@localhost;
-select * from v1;
-ERROR HY000: View 'mysqltest.v1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v2;
-ERROR HY000: View 'mysqltest.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v3;
-a	b
-1	1
-select * from v4;
-a	b
-1	1
-select * from v5;
-ERROR HY000: View 'mysqltest.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-drop table t1;
-use test;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-create database mysqltest;
-use mysqltest;
-create table t1 (a int);
-insert into t1 values (1);
-create algorithm=TEMPTABLE view v1 as select *, a as b from t1;
-create algorithm=MERGE view v2 as select *, a as b from t1;
-create algorithm=TEMPTABLE SQL SECURITY INVOKER view v3 as select *, a as b from t1;
-create algorithm=MERGE SQL SECURITY INVOKER view v4 as select *, a as b from t1;
-create SQL SECURITY INVOKER view v5 as select * from v4;
-grant select on v1 to mysqltest_1@localhost;
-grant select on v2 to mysqltest_1@localhost;
-grant select on v3 to mysqltest_1@localhost;
-grant select on v4 to mysqltest_1@localhost;
-grant select on v5 to mysqltest_1@localhost;
-use mysqltest;
-select * from v1;
-a	b
-1	1
-select * from v2;
-a	b
-1	1
-select * from v3;
-ERROR HY000: View 'mysqltest.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v4;
-ERROR HY000: View 'mysqltest.v4' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-select * from v5;
-ERROR HY000: View 'mysqltest.v5' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-use test;
-drop view v1, v2, v3, v4, v5;
-drop table t1;
-use test;
-REVOKE ALL PRIVILEGES, GRANT OPTION FROM mysqltest_1@localhost;
-drop database mysqltest;
-drop view if exists v1;
-drop table if exists t1;
-create table t1 as select * from mysql.user where user='';
-delete from mysql.user where user='';
-flush privileges;
-grant all on test.* to 'test14256'@'%';
-use test;
-create view v1 as select 42;
-show create view v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`test14256`@`%` SQL SECURITY DEFINER VIEW `v1` AS select 42 AS `42`	latin1	latin1_swedish_ci
-select definer into @v1def1 from information_schema.views
-where table_schema = 'test' and table_name='v1';
-drop view v1;
-create definer=`test14256`@`%` view v1 as select 42;
-show create view v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`test14256`@`%` SQL SECURITY DEFINER VIEW `v1` AS select 42 AS `42`	latin1	latin1_swedish_ci
-select definer into @v1def2 from information_schema.views
-where table_schema = 'test' and table_name='v1';
-drop view v1;
-select @v1def1, @v1def2, @v1def1=@v1def2;
-@v1def1	@v1def2	@v1def1=@v1def2
-test14256@%	test14256@%	1
-drop user test14256;
-insert into mysql.user select * from t1;
-flush privileges;
-drop table t1;
-create database mysqltest;
-use mysqltest;
-CREATE TABLE t1 (i INT);
-CREATE VIEW  v1 AS SELECT * FROM t1;
-SHOW CREATE VIEW v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`i` AS `i` from `t1`	latin1	latin1_swedish_ci
-GRANT SELECT, LOCK TABLES ON mysqltest.* TO mysqltest_1@localhost;
-use mysqltest;
-LOCK TABLES v1 READ;
-SHOW CREATE TABLE v1;
-ERROR 42000: SHOW VIEW command denied to user 'mysqltest_1'@'localhost' for table 'v1'
-UNLOCK TABLES;
-use test;
-use test;
-drop user mysqltest_1@localhost;
-drop database mysqltest;
-create definer=some_user@`` sql security invoker view v1 as select 1;
-Warnings:
-Note	1449	The user specified as a definer ('some_user'@'') does not exist
-create definer=some_user@localhost sql security invoker view v2 as select 1;
-Warnings:
-Note	1449	The user specified as a definer ('some_user'@'localhost') does not exist
-show create view v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`some_user`@`` SQL SECURITY INVOKER VIEW `v1` AS select 1 AS `1`	latin1	latin1_swedish_ci
-show create view v2;
-View	Create View	character_set_client	collation_connection
-v2	CREATE ALGORITHM=UNDEFINED DEFINER=`some_user`@`localhost` SQL SECURITY INVOKER VIEW `v2` AS select 1 AS `1`	latin1	latin1_swedish_ci
-drop view v1;
-drop view v2;
-CREATE DATABASE mysqltest1;
-CREATE USER readonly@localhost;
-CREATE TABLE mysqltest1.t1 (x INT);
-INSERT INTO mysqltest1.t1 VALUES (1), (2);
-CREATE SQL SECURITY INVOKER VIEW mysqltest1.v_t1 AS SELECT * FROM mysqltest1.t1;
-CREATE SQL SECURITY DEFINER VIEW mysqltest1.v_ts AS SELECT * FROM mysqltest1.t1;
-CREATE SQL SECURITY DEFINER VIEW mysqltest1.v_ti AS SELECT * FROM mysqltest1.t1;
-CREATE SQL SECURITY DEFINER VIEW mysqltest1.v_tu AS SELECT * FROM mysqltest1.t1;
-CREATE SQL SECURITY DEFINER VIEW mysqltest1.v_tus AS SELECT * FROM mysqltest1.t1;
-CREATE SQL SECURITY DEFINER VIEW mysqltest1.v_td AS SELECT * FROM mysqltest1.t1;
-CREATE SQL SECURITY DEFINER VIEW mysqltest1.v_tds AS SELECT * FROM mysqltest1.t1;
-GRANT SELECT, INSERT, UPDATE, DELETE ON mysqltest1.v_t1 TO readonly@localhost;
-GRANT SELECT ON mysqltest1.v_ts TO readonly@localhost;
-GRANT INSERT ON mysqltest1.v_ti TO readonly@localhost;
-GRANT UPDATE ON mysqltest1.v_tu TO readonly@localhost;
-GRANT UPDATE,SELECT ON mysqltest1.v_tus TO readonly@localhost;
-GRANT DELETE ON mysqltest1.v_td TO readonly@localhost;
-GRANT DELETE,SELECT ON mysqltest1.v_tds TO readonly@localhost;
-SELECT * FROM mysqltest1.v_t1;
-ERROR HY000: View 'mysqltest1.v_t1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-INSERT INTO mysqltest1.v_t1 VALUES(4);
-ERROR HY000: View 'mysqltest1.v_t1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-DELETE FROM mysqltest1.v_t1 WHERE x = 1;
-ERROR HY000: View 'mysqltest1.v_t1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-UPDATE mysqltest1.v_t1 SET x = 3 WHERE x = 2;
-ERROR HY000: View 'mysqltest1.v_t1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-UPDATE mysqltest1.v_t1 SET x = 3;
-ERROR HY000: View 'mysqltest1.v_t1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-DELETE FROM mysqltest1.v_t1;
-ERROR HY000: View 'mysqltest1.v_t1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-SELECT 1 FROM mysqltest1.v_t1;
-ERROR HY000: View 'mysqltest1.v_t1' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
-SELECT * FROM mysqltest1.t1;
-ERROR 42000: SELECT command denied to user 'readonly'@'localhost' for table 't1'
-SELECT * FROM mysqltest1.v_ts;
-x
-1
-2
-SELECT * FROM mysqltest1.v_ts, mysqltest1.t1 WHERE mysqltest1.t1.x = mysqltest1.v_ts.x;
-ERROR 42000: SELECT command denied to user 'readonly'@'localhost' for table 't1'
-SELECT * FROM mysqltest1.v_ti;
-ERROR 42000: SELECT command denied to user 'readonly'@'localhost' for table 'v_ti'
-INSERT INTO mysqltest1.v_ts VALUES (100);
-ERROR 42000: INSERT command denied to user 'readonly'@'localhost' for table 'v_ts'
-INSERT INTO mysqltest1.v_ti VALUES (100);
-UPDATE mysqltest1.v_ts SET x= 200 WHERE x = 100;
-ERROR 42000: UPDATE command denied to user 'readonly'@'localhost' for table 'v_ts'
-UPDATE mysqltest1.v_ts SET x= 200;
-ERROR 42000: UPDATE command denied to user 'readonly'@'localhost' for table 'v_ts'
-UPDATE mysqltest1.v_tu SET x= 200 WHERE x = 100;
-UPDATE mysqltest1.v_tus SET x= 200 WHERE x = 100;
-UPDATE mysqltest1.v_tu SET x= 200;
-DELETE FROM mysqltest1.v_ts WHERE x= 200;
-ERROR 42000: DELETE command denied to user 'readonly'@'localhost' for table 'v_ts'
-DELETE FROM mysqltest1.v_ts;
-ERROR 42000: DELETE command denied to user 'readonly'@'localhost' for table 'v_ts'
-DELETE FROM mysqltest1.v_td WHERE x= 200;
-ERROR 42000: SELECT command denied to user 'readonly'@'localhost' for column 'x' in table 'v_td'
-DELETE FROM mysqltest1.v_tds WHERE x= 200;
-DELETE FROM mysqltest1.v_td;
-DROP VIEW mysqltest1.v_tds;
-DROP VIEW mysqltest1.v_td;
-DROP VIEW mysqltest1.v_tus;
-DROP VIEW mysqltest1.v_tu;
-DROP VIEW mysqltest1.v_ti;
-DROP VIEW mysqltest1.v_ts;
-DROP VIEW mysqltest1.v_t1;
-DROP TABLE mysqltest1.t1;
-DROP USER readonly@localhost;
-DROP DATABASE mysqltest1;
-CREATE TABLE t1 (a INT PRIMARY KEY);
-INSERT INTO t1 VALUES (1), (2), (3);
-CREATE DEFINER = 'no-such-user'@localhost VIEW v AS SELECT a from t1;
-Warnings:
-Note	1449	The user specified as a definer ('no-such-user'@'localhost') does not exist
-SHOW CREATE VIEW v;
-View	Create View	character_set_client	collation_connection
-v	CREATE ALGORITHM=UNDEFINED DEFINER=`no-such-user`@`localhost` SQL SECURITY DEFINER VIEW `v` AS select `test`.`t1`.`a` AS `a` from `t1`	latin1	latin1_swedish_ci
-Warnings:
-Note	1449	The user specified as a definer ('no-such-user'@'localhost') does not exist
-SELECT * FROM v;
-ERROR HY000: The user specified as a definer ('no-such-user'@'localhost') does not exist
-DROP VIEW v;
-DROP TABLE t1;
-USE test;
-CREATE USER mysqltest_db1@localhost identified by 'PWD';
-GRANT ALL ON mysqltest_db1.* TO mysqltest_db1@localhost WITH GRANT OPTION;
-CREATE SCHEMA mysqltest_db1 ;
-USE mysqltest_db1 ;
-CREATE TABLE t1 (f1 INTEGER);
-CREATE VIEW view1 AS
-SELECT * FROM t1;
-SHOW CREATE VIEW view1;
-View	Create View	character_set_client	collation_connection
-view1	CREATE ALGORITHM=UNDEFINED DEFINER=`mysqltest_db1`@`localhost` SQL SECURITY DEFINER VIEW `view1` AS select `t1`.`f1` AS `f1` from `t1`	latin1	latin1_swedish_ci
-CREATE VIEW view2 AS
-SELECT * FROM view1;
-# Here comes a suspicious warning
-SHOW CREATE VIEW view2;
-View	Create View	character_set_client	collation_connection
-view2	CREATE ALGORITHM=UNDEFINED DEFINER=`mysqltest_db1`@`localhost` SQL SECURITY DEFINER VIEW `view2` AS select `view1`.`f1` AS `f1` from `view1`	latin1	latin1_swedish_ci
-# But the view view2 is usable
-SELECT * FROM view2;
-f1
-CREATE VIEW view3 AS
-SELECT * FROM view2;
-SELECT * from view3;
-f1
-DROP VIEW mysqltest_db1.view3;
-DROP VIEW mysqltest_db1.view2;
-DROP VIEW mysqltest_db1.view1;
-DROP TABLE mysqltest_db1.t1;
-DROP SCHEMA mysqltest_db1;
-DROP USER mysqltest_db1@localhost;
-CREATE DATABASE test1;
-CREATE DATABASE test2;
-CREATE TABLE test1.t0 (a VARCHAR(20)) engine=myisam;
-CREATE TABLE test2.t1 (a VARCHAR(20));
-CREATE VIEW  test2.t3 AS SELECT * FROM test1.t0;
-CREATE OR REPLACE VIEW test.v1 AS 
-SELECT ta.a AS col1, tb.a AS col2 FROM test2.t3 ta, test2.t1 tb;
-DROP VIEW test.v1;
-DROP VIEW test2.t3;
-DROP TABLE test2.t1, test1.t0;
-DROP DATABASE test2;
-DROP DATABASE test1;
-DROP VIEW IF EXISTS v1;
-DROP VIEW IF EXISTS v2;
-DROP VIEW IF EXISTS v3;
-DROP FUNCTION IF EXISTS f1;
-DROP FUNCTION IF EXISTS f2;
-DROP PROCEDURE IF EXISTS p1;
-CREATE SQL SECURITY DEFINER VIEW v1 AS SELECT CURRENT_USER() AS cu;
-CREATE FUNCTION f1() RETURNS VARCHAR(77) SQL SECURITY INVOKER
-RETURN CURRENT_USER();
-CREATE SQL SECURITY DEFINER VIEW v2 AS SELECT f1() AS cu;
-CREATE PROCEDURE p1(OUT cu VARCHAR(77)) SQL SECURITY INVOKER
-SET cu= CURRENT_USER();
-CREATE FUNCTION f2() RETURNS VARCHAR(77) SQL SECURITY INVOKER
-BEGIN
-DECLARE cu VARCHAR(77);
-CALL p1(cu);
-RETURN cu;
-END|
-CREATE SQL SECURITY DEFINER VIEW v3 AS SELECT f2() AS cu;
-CREATE USER mysqltest_u1@localhost;
-GRANT ALL ON test.* TO mysqltest_u1@localhost;
-
-The following tests should all return 1.
-
-SELECT CURRENT_USER() = 'mysqltest_u1@localhost';
-CURRENT_USER() = 'mysqltest_u1@localhost'
-1
-SELECT f1() = 'mysqltest_u1@localhost';
-f1() = 'mysqltest_u1@localhost'
-1
-CALL p1(@cu);
-SELECT @cu = 'mysqltest_u1@localhost';
-@cu = 'mysqltest_u1@localhost'
-1
-SELECT f2() = 'mysqltest_u1@localhost';
-f2() = 'mysqltest_u1@localhost'
-1
-SELECT cu = 'root@localhost' FROM v1;
-cu = 'root@localhost'
-1
-SELECT cu = 'root@localhost' FROM v2;
-cu = 'root@localhost'
-1
-SELECT cu = 'root@localhost' FROM v3;
-cu = 'root@localhost'
-1
-DROP VIEW v3;
-DROP FUNCTION f2;
-DROP PROCEDURE p1;
-DROP FUNCTION f1;
-DROP VIEW v2;
-DROP VIEW v1;
-DROP USER mysqltest_u1@localhost;
-CREATE DATABASE db17254;
-USE db17254;
-CREATE TABLE t1 (f1 INT);
-INSERT INTO t1 VALUES (10),(20);
-CREATE USER def_17254@localhost;
-GRANT SELECT ON db17254.* TO def_17254@localhost;
-CREATE USER inv_17254@localhost;
-GRANT SELECT ON db17254.t1 TO inv_17254@localhost;
-GRANT CREATE VIEW ON db17254.* TO def_17254@localhost;
-CREATE VIEW v1 AS SELECT * FROM t1;
-DROP USER def_17254@localhost;
-for a user
-SELECT * FROM v1;
-ERROR 42000: SELECT command denied to user 'inv_17254'@'localhost' for table 'v1'
-for a superuser
-SELECT * FROM v1;
-ERROR HY000: The user specified as a definer ('def_17254'@'localhost') does not exist
-DROP USER inv_17254@localhost;
-DROP DATABASE db17254;
-DROP DATABASE IF EXISTS mysqltest_db1;
-DROP DATABASE IF EXISTS mysqltest_db2;
-DROP USER mysqltest_u1;
-DROP USER mysqltest_u2;
-CREATE USER mysqltest_u1@localhost;
-CREATE USER mysqltest_u2@localhost;
-CREATE DATABASE mysqltest_db1;
-CREATE DATABASE mysqltest_db2;
-GRANT ALL ON mysqltest_db1.* TO mysqltest_u1@localhost WITH GRANT OPTION;
-GRANT ALL ON mysqltest_db2.* TO mysqltest_u2@localhost;
-CREATE TABLE t1 (i INT);
-INSERT INTO t1 VALUES (1);
-CREATE VIEW v1 AS SELECT i FROM t1 WHERE 1 IN (SELECT * FROM t1);
-CREATE TABLE t2 (s CHAR(7));
-INSERT INTO t2 VALUES ('public');
-GRANT SELECT ON v1 TO mysqltest_u2@localhost;
-GRANT SELECT ON t2 TO mysqltest_u2@localhost;
-SELECT * FROM mysqltest_db1.v1, mysqltest_db1.t2;
-i	s
-1	public
-PREPARE stmt1 FROM "SELECT * FROM mysqltest_db1.t2";
-EXECUTE stmt1;
-s
-public
-PREPARE stmt2 FROM "SELECT * FROM mysqltest_db1.v1, mysqltest_db1.t2";
-EXECUTE stmt2;
-i	s
-1	public
-REVOKE SELECT ON t2 FROM mysqltest_u2@localhost;
-UPDATE t2 SET s = 'private' WHERE s = 'public';
-SELECT * FROM mysqltest_db1.v1, mysqltest_db1.t2;
-ERROR 42000: SELECT command denied to user 'mysqltest_u2'@'localhost' for table 't2'
-EXECUTE stmt1;
-ERROR 42000: SELECT command denied to user 'mysqltest_u2'@'localhost' for table 't2'
-EXECUTE stmt2;
-ERROR 42000: SELECT command denied to user 'mysqltest_u2'@'localhost' for table 't2'
-REVOKE ALL ON mysqltest_db1.* FROM mysqltest_u1@localhost;
-REVOKE ALL ON mysqltest_db2.* FROM mysqltest_u2@localhost;
-DROP DATABASE mysqltest_db1;
-DROP DATABASE mysqltest_db2;
-DROP USER mysqltest_u1@localhost;
-DROP USER mysqltest_u2@localhost;
-CREATE DATABASE db26813;
-USE db26813;
-CREATE TABLE t1(f1 INT, f2 INT);
-CREATE VIEW v1 AS SELECT f1 FROM t1;
-CREATE VIEW v2 AS SELECT f1 FROM t1;
-CREATE VIEW v3 AS SELECT f1 FROM t1;
-CREATE USER u26813@localhost;
-GRANT DROP ON db26813.v1 TO u26813@localhost;
-GRANT CREATE VIEW ON db26813.v2 TO u26813@localhost;
-GRANT DROP, CREATE VIEW ON db26813.v3 TO u26813@localhost;
-GRANT SELECT ON db26813.t1 TO u26813@localhost;
-ALTER VIEW v1 AS SELECT f2 FROM t1;
-ERROR 42000: CREATE VIEW command denied to user 'u26813'@'localhost' for table 'v1'
-ALTER VIEW v2 AS SELECT f2 FROM t1;
-ERROR 42000: DROP command denied to user 'u26813'@'localhost' for table 'v2'
-ALTER VIEW v3 AS SELECT f2 FROM t1;
-ERROR 42000: Access denied; you need (at least one of) the SUPER privilege(s) for this operation
-SHOW CREATE VIEW v3;
-View	Create View	character_set_client	collation_connection
-v3	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v3` AS select `t1`.`f1` AS `f1` from `t1`	latin1	latin1_swedish_ci
-DROP USER u26813@localhost;
-DROP DATABASE db26813;
-#
-# Bug#29908 A user can gain additional access through the ALTER VIEW.
-#
-CREATE DATABASE mysqltest_29908;
-USE mysqltest_29908;
-CREATE TABLE t1(f1 INT, f2 INT);
-CREATE USER u29908_1@localhost;
-CREATE DEFINER = u29908_1@localhost VIEW v1 AS SELECT f1 FROM t1;
-CREATE DEFINER = u29908_1@localhost SQL SECURITY INVOKER VIEW v2 AS
-SELECT f1 FROM t1;
-GRANT SELECT, DROP, CREATE VIEW, SHOW VIEW ON mysqltest_29908.v1 TO u29908_1@localhost;
-GRANT SELECT, DROP, CREATE VIEW, SHOW VIEW ON mysqltest_29908.v2 TO u29908_1@localhost;
-GRANT SELECT ON mysqltest_29908.t1 TO u29908_1@localhost;
-CREATE USER u29908_2@localhost;
-GRANT SELECT, DROP, CREATE VIEW ON mysqltest_29908.v1 TO u29908_2@localhost;
-GRANT SELECT, DROP, CREATE VIEW, SHOW VIEW ON mysqltest_29908.v2 TO u29908_2@localhost;
-GRANT SELECT ON mysqltest_29908.t1 TO u29908_2@localhost;
-ALTER VIEW v1 AS SELECT f2 FROM t1;
-ERROR 42000: Access denied; you need (at least one of) the SUPER privilege(s) for this operation
-ALTER VIEW v2 AS SELECT f2 FROM t1;
-ERROR 42000: Access denied; you need (at least one of) the SUPER privilege(s) for this operation
-SHOW CREATE VIEW v2;
-View	Create View	character_set_client	collation_connection
-v2	CREATE ALGORITHM=UNDEFINED DEFINER=`u29908_1`@`localhost` SQL SECURITY INVOKER VIEW `v2` AS select `t1`.`f1` AS `f1` from `t1`	latin1	latin1_swedish_ci
-ALTER VIEW v1 AS SELECT f2 FROM t1;
-SHOW CREATE VIEW v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`u29908_1`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`f2` AS `f2` from `t1`	latin1	latin1_swedish_ci
-ALTER VIEW v2 AS SELECT f2 FROM t1;
-SHOW CREATE VIEW v2;
-View	Create View	character_set_client	collation_connection
-v2	CREATE ALGORITHM=UNDEFINED DEFINER=`u29908_1`@`localhost` SQL SECURITY INVOKER VIEW `v2` AS select `t1`.`f2` AS `f2` from `t1`	latin1	latin1_swedish_ci
-ALTER VIEW v1 AS SELECT f1 FROM t1;
-SHOW CREATE VIEW v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`u29908_1`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`f1` AS `f1` from `t1`	latin1	latin1_swedish_ci
-ALTER VIEW v2 AS SELECT f1 FROM t1;
-SHOW CREATE VIEW v2;
-View	Create View	character_set_client	collation_connection
-v2	CREATE ALGORITHM=UNDEFINED DEFINER=`u29908_1`@`localhost` SQL SECURITY INVOKER VIEW `v2` AS select `t1`.`f1` AS `f1` from `t1`	latin1	latin1_swedish_ci
-DROP USER u29908_1@localhost;
-DROP USER u29908_2@localhost;
-DROP DATABASE mysqltest_29908;
-#######################################################################
-DROP DATABASE IF EXISTS mysqltest1;
-DROP DATABASE IF EXISTS mysqltest2;
-CREATE DATABASE mysqltest1;
-CREATE DATABASE mysqltest2;
-CREATE TABLE mysqltest1.t1(c1 INT);
-CREATE TABLE mysqltest1.t2(c2 INT);
-CREATE TABLE mysqltest1.t3(c3 INT);
-CREATE TABLE mysqltest1.t4(c4 INT);
-INSERT INTO mysqltest1.t1 VALUES (11), (12), (13), (14);
-INSERT INTO mysqltest1.t2 VALUES (21), (22), (23), (24);
-INSERT INTO mysqltest1.t3 VALUES (31), (32), (33), (34);
-INSERT INTO mysqltest1.t4 VALUES (41), (42), (43), (44);
-GRANT SELECT ON mysqltest1.t1 TO mysqltest_u1@localhost;
-GRANT INSERT ON mysqltest1.t2 TO mysqltest_u1@localhost;
-GRANT SELECT, UPDATE ON mysqltest1.t3 TO mysqltest_u1@localhost;
-GRANT SELECT, DELETE ON mysqltest1.t4 TO mysqltest_u1@localhost;
-GRANT ALL PRIVILEGES ON mysqltest2.* TO mysqltest_u1@localhost;
-
----> connection: bug24040_con
-SELECT * FROM mysqltest1.t1;
-c1
-11
-12
-13
-14
-INSERT INTO mysqltest1.t2 VALUES(25);
-UPDATE mysqltest1.t3 SET c3 = 331 WHERE c3 = 31;
-DELETE FROM mysqltest1.t4 WHERE c4 = 44;
-CREATE VIEW v1 AS SELECT * FROM mysqltest1.t1;
-CREATE VIEW v2 AS SELECT * FROM mysqltest1.t2;
-CREATE VIEW v3 AS SELECT * FROM mysqltest1.t3;
-CREATE VIEW v4 AS SELECT * FROM mysqltest1.t4;
-SELECT * FROM v1;
-c1
-11
-12
-13
-14
-INSERT INTO v2 VALUES(26);
-UPDATE v3 SET c3 = 332 WHERE c3 = 32;
-DELETE FROM v4 WHERE c4 = 43;
-CREATE VIEW v12 AS SELECT c1, c2 FROM mysqltest1.t1, mysqltest1.t2;
-ERROR 42000: create view command denied to user 'mysqltest_u1'@'localhost' for column 'c2' in table 'v12'
-CREATE VIEW v13 AS SELECT c1, c3 FROM mysqltest1.t1, mysqltest1.t3;
-CREATE VIEW v14 AS SELECT c1, c4 FROM mysqltest1.t1, mysqltest1.t4;
-CREATE VIEW v21 AS SELECT c2, c1 FROM mysqltest1.t2, mysqltest1.t1;
-ERROR 42000: create view command denied to user 'mysqltest_u1'@'localhost' for column 'c1' in table 'v21'
-CREATE VIEW v23 AS SELECT c2, c3 FROM mysqltest1.t2, mysqltest1.t3;
-ERROR 42000: create view command denied to user 'mysqltest_u1'@'localhost' for column 'c3' in table 'v23'
-CREATE VIEW v24 AS SELECT c2, c4 FROM mysqltest1.t2, mysqltest1.t4;
-ERROR 42000: create view command denied to user 'mysqltest_u1'@'localhost' for column 'c4' in table 'v24'
-CREATE VIEW v31 AS SELECT c3, c1 FROM mysqltest1.t3, mysqltest1.t1;
-CREATE VIEW v32 AS SELECT c3, c2 FROM mysqltest1.t3, mysqltest1.t2;
-ERROR 42000: create view command denied to user 'mysqltest_u1'@'localhost' for column 'c2' in table 'v32'
-CREATE VIEW v34 AS SELECT c3, c4 FROM mysqltest1.t3, mysqltest1.t4;
-CREATE VIEW v41 AS SELECT c4, c1 FROM mysqltest1.t4, mysqltest1.t1;
-CREATE VIEW v42 AS SELECT c4, c2 FROM mysqltest1.t4, mysqltest1.t2;
-ERROR 42000: create view command denied to user 'mysqltest_u1'@'localhost' for column 'c2' in table 'v42'
-CREATE VIEW v43 AS SELECT c4, c3 FROM mysqltest1.t4, mysqltest1.t3;
-
----> connection: default
-SELECT * FROM mysqltest1.t1;
-c1
-11
-12
-13
-14
-SELECT * FROM mysqltest1.t2;
-c2
-21
-22
-23
-24
-25
-26
-SELECT * FROM mysqltest1.t3 order by c3;
-c3
-33
-34
-331
-332
-SELECT * FROM mysqltest1.t4;
-c4
-41
-42
-DROP DATABASE mysqltest1;
-DROP DATABASE mysqltest2;
-DROP USER mysqltest_u1@localhost;
-End of 5.0 tests.
-DROP VIEW IF EXISTS v1;
-DROP TABLE IF EXISTS t1;
-CREATE TABLE t1 (i INT);
-CREATE VIEW v1 AS SELECT * FROM t1;
-ALTER VIEW v1 AS SELECT * FROM t1;
-SHOW CREATE VIEW v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`i` AS `i` from `t1`	latin1	latin1_swedish_ci
-ALTER DEFINER=no_such@user_1 VIEW v1 AS SELECT * FROM t1;
-Warnings:
-Note	1449	The user specified as a definer ('no_such'@'user_1') does not exist
-SHOW CREATE VIEW v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=UNDEFINED DEFINER=`no_such`@`user_1` SQL SECURITY DEFINER VIEW `v1` AS select `test`.`t1`.`i` AS `i` from `t1`	latin1	latin1_swedish_ci
-Warnings:
-Note	1449	The user specified as a definer ('no_such'@'user_1') does not exist
-ALTER ALGORITHM=MERGE VIEW v1 AS SELECT * FROM t1;
-Warnings:
-Note	1449	The user specified as a definer ('no_such'@'user_1') does not exist
-SHOW CREATE VIEW v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=MERGE DEFINER=`no_such`@`user_1` SQL SECURITY DEFINER VIEW `v1` AS select `test`.`t1`.`i` AS `i` from `t1`	latin1	latin1_swedish_ci
-Warnings:
-Note	1449	The user specified as a definer ('no_such'@'user_1') does not exist
-ALTER ALGORITHM=TEMPTABLE DEFINER=no_such@user_2 VIEW v1 AS SELECT * FROM t1;
-Warnings:
-Note	1449	The user specified as a definer ('no_such'@'user_2') does not exist
-SHOW CREATE VIEW v1;
-View	Create View	character_set_client	collation_connection
-v1	CREATE ALGORITHM=TEMPTABLE DEFINER=`no_such`@`user_2` SQL SECURITY DEFINER VIEW `v1` AS select `test`.`t1`.`i` AS `i` from `t1`	latin1	latin1_swedish_ci
-Warnings:
-Note	1449	The user specified as a definer ('no_such'@'user_2') does not exist
-DROP VIEW v1;
-DROP TABLE t1;
-End of 5.1 tests.
diff --git a/mysql-test/suite/percona/percona_flush_contiguous_neighbors-master.opt b/mysql-test/suite/percona/percona_flush_contiguous_neighbors-master.opt
new file mode 100644
index 00000000000..075af88054f
--- /dev/null
+++ b/mysql-test/suite/percona/percona_flush_contiguous_neighbors-master.opt
@@ -0,0 +1 @@
+--innodb_flush_neighbor_pages=cont
diff --git a/mysql-test/suite/percona/percona_flush_contiguous_neighbors.result b/mysql-test/suite/percona/percona_flush_contiguous_neighbors.result
new file mode 100644
index 00000000000..8c6b81f0848
--- /dev/null
+++ b/mysql-test/suite/percona/percona_flush_contiguous_neighbors.result
@@ -0,0 +1,21 @@
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1 (id INT AUTO_INCREMENT, foo CHAR(255), PRIMARY KEY (id)) ENGINE=InnoDB;
+INSERT INTO t1(foo) VALUES ('a'), ('b');
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+DROP TABLE t1;
diff --git a/mysql-test/suite/percona/percona_flush_contiguous_neighbors.test b/mysql-test/suite/percona/percona_flush_contiguous_neighbors.test
new file mode 100644
index 00000000000..4eb967fcd16
--- /dev/null
+++ b/mysql-test/suite/percona/percona_flush_contiguous_neighbors.test
@@ -0,0 +1,37 @@
+# Test for innodb_flush_neighbor_pages=contiguous.
+# The test is very crude: we simply overflow the buffer pool with such a number of
+# new/modified pages that some flushing is bound to happen.
+
+--source include/have_innodb.inc
+--source include/big_test.inc
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+CREATE TABLE t1 (id INT AUTO_INCREMENT, foo CHAR(255), PRIMARY KEY (id)) ENGINE=InnoDB;
+
+INSERT INTO t1(foo) VALUES ('a'), ('b');
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+INSERT INTO t1(foo) SELECT foo FROM t1;
+
+# TODO: cannot record a stable value here.  A check of > 0 should be enough,
+# but the variable is not accessible through INFORMATION_SCHEMA currently.
+# SHOW GLOBAL STATUS LIKE 'Innodb_buffer_pool_pages_flushed';
+
+DROP TABLE t1;
diff --git a/mysql-test/suite/percona/percona_query_response_time-replication.result b/mysql-test/suite/percona/percona_query_response_time-replication.result
index c00520110c2..a6e88be6103 100644
--- a/mysql-test/suite/percona/percona_query_response_time-replication.result
+++ b/mysql-test/suite/percona/percona_query_response_time-replication.result
@@ -100,10 +100,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -146,10 +146,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=default;
@@ -251,10 +251,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -297,10 +297,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=default;
@@ -375,7 +375,7 @@ SHOW QUERY_RESPONSE_TIME;
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -391,7 +391,7 @@ time	count	total
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=default;
@@ -469,7 +469,7 @@ SHOW QUERY_RESPONSE_TIME;
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -488,7 +488,7 @@ time	count	total
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=default;
@@ -556,7 +556,7 @@ SHOW QUERY_RESPONSE_TIME;
       1.000000	34	     12.250000
     156.000000	33	     77.099997
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -565,7 +565,7 @@ time	count	total
       1.000000	34	     12.250000
     156.000000	33	     77.099997
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=default;
@@ -632,7 +632,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	34	     12.250000
    1000.000000	33	     77.099997
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -640,7 +640,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	34	     12.250000
    1000.000000	33	     77.099997
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=default;
@@ -709,7 +709,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	34	     12.250000
    1000.000000	33	     77.099997
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -717,7 +717,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	34	     12.250000
    1000.000000	33	     77.099997
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=default;
diff --git a/mysql-test/suite/percona/percona_query_response_time-stored.result b/mysql-test/suite/percona/percona_query_response_time-stored.result
index 7385231241e..fb458d6e7ab 100644
--- a/mysql-test/suite/percona/percona_query_response_time-stored.result
+++ b/mysql-test/suite/percona/percona_query_response_time-stored.result
@@ -80,10 +80,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -126,10 +126,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -204,10 +204,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -250,10 +250,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -301,7 +301,7 @@ SHOW QUERY_RESPONSE_TIME;
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -317,7 +317,7 @@ time	count	total
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -368,7 +368,7 @@ SHOW QUERY_RESPONSE_TIME;
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -387,7 +387,7 @@ time	count	total
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -428,7 +428,7 @@ SHOW QUERY_RESPONSE_TIME;
       1.000000	55	      8.450000
     156.000000	11	     25.699999
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -437,7 +437,7 @@ time	count	total
       1.000000	55	      8.450000
     156.000000	11	     25.699999
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -477,7 +477,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	55	      8.450000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -485,7 +485,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	55	      8.450000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -527,7 +527,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	55	      8.450000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -535,7 +535,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	55	      8.450000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
diff --git a/mysql-test/suite/percona/percona_query_response_time.result b/mysql-test/suite/percona/percona_query_response_time.result
index 4c4d50319c0..1eb90d3cdd4 100644
--- a/mysql-test/suite/percona/percona_query_response_time.result
+++ b/mysql-test/suite/percona/percona_query_response_time.result
@@ -45,10 +45,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -91,10 +91,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=1;
 SET SESSION query_exec_time=0.31;
@@ -231,10 +231,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -277,10 +277,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -328,10 +328,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -374,10 +374,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=1;
 SET SESSION query_exec_time=0.31;
@@ -514,10 +514,10 @@ SHOW QUERY_RESPONSE_TIME;
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -560,10 +560,10 @@ time	count	total
  131072.000000	0	      0.000000
  262144.000000	0	      0.000000
  524288.000000	0	      0.000000
- 1048576.00000	0	      0.000000
- 2097152.00000	0	      0.000000
- 4194304.00000	0	      0.000000
- 8388608.00000	0	      0.000000
+1048576.000000	0	      0.000000
+2097152.000000	0	      0.000000
+4194304.000000	0	      0.000000
+8388608.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -584,7 +584,7 @@ SHOW QUERY_RESPONSE_TIME;
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -600,7 +600,7 @@ time	count	total
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=1;
 SET SESSION query_exec_time=0.31;
@@ -710,7 +710,7 @@ SHOW QUERY_RESPONSE_TIME;
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -726,7 +726,7 @@ time	count	total
    1000.000000	0	      0.000000
   10000.000000	0	      0.000000
  100000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -750,7 +750,7 @@ SHOW QUERY_RESPONSE_TIME;
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -769,7 +769,7 @@ time	count	total
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=1;
 SET SESSION query_exec_time=0.31;
@@ -882,7 +882,7 @@ SHOW QUERY_RESPONSE_TIME;
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -901,7 +901,7 @@ time	count	total
   16807.000000	0	      0.000000
  117649.000000	0	      0.000000
  823543.000000	0	      0.000000
- 5764801.00000	0	      0.000000
+5764801.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -915,7 +915,7 @@ SHOW QUERY_RESPONSE_TIME;
       1.000000	0	      0.000000
     156.000000	0	      0.000000
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -924,7 +924,7 @@ time	count	total
       1.000000	0	      0.000000
     156.000000	0	      0.000000
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=1;
 SET SESSION query_exec_time=0.31;
@@ -1027,7 +1027,7 @@ SHOW QUERY_RESPONSE_TIME;
       1.000000	11	      4.050000
     156.000000	11	     25.699999
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -1036,7 +1036,7 @@ time	count	total
       1.000000	11	      4.050000
     156.000000	11	     25.699999
   24336.000000	0	      0.000000
- 3796416.00000	0	      0.000000
+3796416.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -1049,7 +1049,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	0	      0.000000
    1000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -1057,7 +1057,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	0	      0.000000
    1000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=1;
 SET SESSION query_exec_time=0.31;
@@ -1159,7 +1159,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	11	      4.050000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -1167,7 +1167,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	11	      4.050000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET SESSION query_exec_time=0.1;
@@ -1182,7 +1182,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	0	      0.000000
    1000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -1190,7 +1190,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	0	      0.000000
    1000.000000	0	      0.000000
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET GLOBAL QUERY_RESPONSE_TIME_STATS=1;
 SET SESSION query_exec_time=0.31;
@@ -1292,7 +1292,7 @@ SHOW QUERY_RESPONSE_TIME;
       0.001000	0	      0.000000
       1.000000	11	      4.050000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SELECT * FROM INFORMATION_SCHEMA.QUERY_RESPONSE_TIME;
 time	count	total
@@ -1300,7 +1300,7 @@ time	count	total
       0.001000	0	      0.000000
       1.000000	11	      4.050000
    1000.000000	11	     25.699999
- 1000000.00000	0	      0.000000
+1000000.000000	0	      0.000000
 TOO LONG	0	TOO LONG
 SET SESSION query_exec_time=default;
 SET GLOBAL QUERY_RESPONSE_TIME_RANGE_BASE=default;
diff --git a/mysql-test/suite/percona/percona_server_variables_debug.result b/mysql-test/suite/percona/percona_server_variables_debug.result
index ea1c02e7716..ae02a48c8fa 100644
--- a/mysql-test/suite/percona/percona_server_variables_debug.result
+++ b/mysql-test/suite/percona/percona_server_variables_debug.result
@@ -109,6 +109,7 @@ INNODB_FILE_FORMAT
 INNODB_FILE_FORMAT_CHECK
 INNODB_FILE_FORMAT_MAX
 INNODB_FILE_PER_TABLE
+INNODB_FLUSH_CHECKPOINT_DEBUG
 INNODB_FLUSH_LOG_AT_TRX_COMMIT
 INNODB_FLUSH_METHOD
 INNODB_FLUSH_NEIGHBOR_PAGES
@@ -228,6 +229,7 @@ MAX_SP_RECURSION_DEPTH
 MAX_TMP_TABLES
 MAX_USER_CONNECTIONS
 MAX_WRITE_LOCK_COUNT
+METADATA_LOCKS_CACHE_SIZE
 MIN_EXAMINED_ROW_LIMIT
 MULTI_RANGE_COUNT
 MYISAM_DATA_POINTER_SIZE
diff --git a/mysql-test/suite/percona/percona_server_variables_release.result b/mysql-test/suite/percona/percona_server_variables_release.result
index e5965cf7e5e..29ac402c144 100644
--- a/mysql-test/suite/percona/percona_server_variables_release.result
+++ b/mysql-test/suite/percona/percona_server_variables_release.result
@@ -225,6 +225,7 @@ MAX_SP_RECURSION_DEPTH
 MAX_TMP_TABLES
 MAX_USER_CONNECTIONS
 MAX_WRITE_LOCK_COUNT
+METADATA_LOCKS_CACHE_SIZE
 MIN_EXAMINED_ROW_LIMIT
 MULTI_RANGE_COUNT
 MYISAM_DATA_POINTER_SIZE
diff --git a/mysql-test/suite/percona/percona_sync_flush.result b/mysql-test/suite/percona/percona_sync_flush.result
new file mode 100644
index 00000000000..12335257b32
--- /dev/null
+++ b/mysql-test/suite/percona/percona_sync_flush.result
@@ -0,0 +1,35 @@
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1 (id INT AUTO_INCREMENT, foo CHAR(255), PRIMARY KEY (id)) ENGINE=InnoDB;
+SET @@global.innodb_flush_checkpoint_debug=1;
+INSERT INTO t1(foo) VALUES ('a'), ('b');
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+INSERT INTO t1(foo) SELECT foo FROM t1;
+UPDATE t1 SET foo='c';
+SET @@global.innodb_flush_checkpoint_debug=0;
+UPDATE t1 SET foo='d' WHERE foo='c';
+DROP TABLE t1;
diff --git a/mysql-test/suite/percona/percona_sync_flush.test b/mysql-test/suite/percona/percona_sync_flush.test
new file mode 100644
index 00000000000..35e8d8f92d2
--- /dev/null
+++ b/mysql-test/suite/percona/percona_sync_flush.test
@@ -0,0 +1,33 @@
+# Test for InnoDB sync state flushing.
+
+--source include/have_innodb.inc
+--source include/have_debug.inc
+
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+CREATE TABLE t1 (id INT AUTO_INCREMENT, foo CHAR(255), PRIMARY KEY (id)) ENGINE=InnoDB;
+
+# It is hard to get to InnoDB sync state flushing in MTR with regular workload.  Perhaps
+# it is possible with many parallel connections, but that would be brittle anyway.
+# So, just disable preflushing and checkpointing and issue simple workload.
+SET @@global.innodb_flush_checkpoint_debug=1;
+
+INSERT INTO t1(foo) VALUES ('a'), ('b');
+
+let $rep=0;
+while ($rep < 14)
+{
+        INSERT INTO t1(foo) SELECT foo FROM t1;
+        UPDATE t1 SET foo='c';
+        inc $rep;
+}
+
+# By now checkpoint age should be well past sync flush point.  Allow
+# preflushing/checkpointing again and do some work in order to do the sync flush.
+SET @@global.innodb_flush_checkpoint_debug=0;
+
+UPDATE t1 SET foo='d' WHERE foo='c';
+
+DROP TABLE t1;
diff --git a/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.inc b/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.inc
index d55e52d5b64..d9804722147 100644
--- a/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.inc
+++ b/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.inc
@@ -91,5 +91,27 @@ let $query=select * from t1 -- comment in the end
 ;
 --source percona_query_cache_with_comments_eval.inc
 
+let $query=select */* a comment \*/from t1;
+--source include/percona_query_cache_with_comments_eval.inc
+
+let $query=select *# a comment \\
+from t1;
+--source include/percona_query_cache_with_comments_eval.inc
+
+let $query=select *-- a comment \\
+from t1;
+--source include/percona_query_cache_with_comments_eval.inc
+
+let $query=select "\\\\"" /* not a comment */" from t1;
+--source include/percona_query_cache_with_comments_eval.inc
+
+let $query=select "\\\\"" /*! not a comment */" from t1;
+--source include/percona_query_cache_with_comments_eval.inc
+
+# following two queries related to bug #856404.
+# There are different queries, but opt_query_cache_strip_comments thinks that they are equal.
 let $query=select ' \'  ' from t1;
 --source percona_query_cache_with_comments_eval.inc
+
+let $query=select ' \' /* comment inside quotes with internal backslash quote */' from t1;
+--source percona_query_cache_with_comments_eval.inc
diff --git a/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.result b/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.result
index 169fdf80fef..d1a6ded08d7 100644
--- a/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.result
+++ b/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments.result
@@ -831,7 +831,7 @@ show status like "Qcache_hits";
 Variable_name	Value
 Qcache_hits	50
 -----------------------------------------------------
-select ' \'  ' from t1
+select */* a comment \*/from t1
 -----------------------------------------------------
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
@@ -842,6 +842,167 @@ Qcache_inserts	1
 show status like "Qcache_hits";
 Variable_name	Value
 Qcache_hits	50
+select */* a comment \*/from t1;
+a
+1
+2
+3
+select */* a comment \*/from t1;
+a
+1
+2
+3
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	52
+-----------------------------------------------------
+select *# a comment \
+from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	52
+select *# a comment \
+from t1;
+a
+1
+2
+3
+select *# a comment \
+from t1;
+a
+1
+2
+3
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	54
+-----------------------------------------------------
+select *-- a comment \
+from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	54
+select *-- a comment \
+from t1;
+a
+1
+2
+3
+select *-- a comment \
+from t1;
+a
+1
+2
+3
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	56
+-----------------------------------------------------
+select "\\"" /* not a comment */" from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	1
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	1
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	56
+select "\\"" /* not a comment */" from t1;
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+select "\\"" /* not a comment */" from t1;
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	2
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	2
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	57
+-----------------------------------------------------
+select "\\"" /*! not a comment */" from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	2
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	2
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	57
+select "\\"" /*! not a comment */" from t1;
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+select "\\"" /*! not a comment */" from t1;
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	3
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	3
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	58
+-----------------------------------------------------
+select ' \'  ' from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	3
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	3
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	58
 select ' \'  ' from t1;
 '  
  '  
@@ -854,13 +1015,44 @@ select ' \'  ' from t1;
  '  
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
-Qcache_queries_in_cache	2
+Qcache_queries_in_cache	4
 show status like "Qcache_inserts";
 Variable_name	Value
-Qcache_inserts	2
+Qcache_inserts	4
 show status like "Qcache_hits";
 Variable_name	Value
-Qcache_hits	51
+Qcache_hits	59
+-----------------------------------------------------
+select ' \' /* comment inside quotes with internal backslash quote */' from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	4
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	4
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	59
+select ' \' /* comment inside quotes with internal backslash quote */' from t1;
+' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+select ' \' /* comment inside quotes with internal backslash quote */' from t1;
+' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	5
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	5
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	60
 DROP TABLE t1;
 SET GLOBAL query_cache_size=default;
 set global query_cache_strip_comments=OFF;
diff --git a/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments_disable.result b/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments_disable.result
index a13a44d9a1c..7e793a942c5 100644
--- a/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments_disable.result
+++ b/mysql-test/suite/percona/query_cache_enhance.patch/percona_query_cache_with_comments_disable.result
@@ -830,7 +830,7 @@ show status like "Qcache_hits";
 Variable_name	Value
 Qcache_hits	25
 -----------------------------------------------------
-select ' \'  ' from t1
+select */* a comment \*/from t1
 -----------------------------------------------------
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
@@ -841,6 +841,167 @@ Qcache_inserts	20
 show status like "Qcache_hits";
 Variable_name	Value
 Qcache_hits	25
+select */* a comment \*/from t1;
+a
+1
+2
+3
+select */* a comment \*/from t1;
+a
+1
+2
+3
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	21
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	21
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	26
+-----------------------------------------------------
+select *# a comment \
+from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	21
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	21
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	26
+select *# a comment \
+from t1;
+a
+1
+2
+3
+select *# a comment \
+from t1;
+a
+1
+2
+3
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	22
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	22
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	27
+-----------------------------------------------------
+select *-- a comment \
+from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	22
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	22
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	27
+select *-- a comment \
+from t1;
+a
+1
+2
+3
+select *-- a comment \
+from t1;
+a
+1
+2
+3
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	23
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	23
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	28
+-----------------------------------------------------
+select "\\"" /* not a comment */" from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	23
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	23
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	28
+select "\\"" /* not a comment */" from t1;
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+select "\\"" /* not a comment */" from t1;
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+\" /* not a comment */
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	24
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	24
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	29
+-----------------------------------------------------
+select "\\"" /*! not a comment */" from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	24
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	24
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	29
+select "\\"" /*! not a comment */" from t1;
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+select "\\"" /*! not a comment */" from t1;
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+\" /*! not a comment */
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	25
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	25
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	30
+-----------------------------------------------------
+select ' \'  ' from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	25
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	25
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	30
 select ' \'  ' from t1;
 '  
  '  
@@ -853,13 +1014,44 @@ select ' \'  ' from t1;
  '  
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
-Qcache_queries_in_cache	21
+Qcache_queries_in_cache	26
 show status like "Qcache_inserts";
 Variable_name	Value
-Qcache_inserts	21
+Qcache_inserts	26
 show status like "Qcache_hits";
 Variable_name	Value
-Qcache_hits	26
+Qcache_hits	31
+-----------------------------------------------------
+select ' \' /* comment inside quotes with internal backslash quote */' from t1
+-----------------------------------------------------
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	26
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	26
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	31
+select ' \' /* comment inside quotes with internal backslash quote */' from t1;
+' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+select ' \' /* comment inside quotes with internal backslash quote */' from t1;
+' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+ ' /* comment inside quotes with internal backslash quote */
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	27
+show status like "Qcache_inserts";
+Variable_name	Value
+Qcache_inserts	27
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	32
 DROP TABLE t1;
 SET GLOBAL query_cache_size=default;
 set global query_cache_strip_comments=OFF;
diff --git a/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.result b/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.result
index 678ed685a5b..c243b8ad02f 100644
--- a/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.result
+++ b/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.result
@@ -3,21 +3,18 @@ flush query cache;
 flush query cache;
 reset query cache;
 flush status;
-DROP TABLE IF EXISTS t;
-CREATE TABLE t(id INT, number INT);
-INSERT INTO t VALUES (0,1);
-INSERT INTO t VALUES (1,2);
-INSERT INTO t VALUES (2,3);
-SET SESSION debug="+d,status_waiting_on_query_cache_mutex_sleep";
-SET DEBUG_SYNC='status_waiting_on_query_cache_mutex SIGNAL thread_ready';
-SELECT number from t where id > 0;
-SHOW PROCESSLIST;
-Id	User	Host	db	Command	Time	State	Info	Rows_sent	Rows_examined	Rows_read
-###	root	###	test	Query	###	NULL	SHOW PROCESSLIST	###	###	###
-###	root	###	test	Query	###	Waiting on query cache mutex	SELECT number from t where id > 0	###	###	###
-SELECT id, info, state FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id;
-id	info	state
-###	SELECT id, info, state FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id	executing
-###	SELECT number from t where id > 0	Waiting on query cache mutex
-DROP TABLE t;
+SET DEBUG_SYNC='after_query_cache_mutex SIGNAL mutex_locked WAIT_FOR unlock_mutex';
+SELECT "mutex_locked_query" as action;
+SET DEBUG_SYNC='now WAIT_FOR mutex_locked';
+SET DEBUG_SYNC='before_query_cache_mutex SIGNAL try_lock_mutex';
+SELECT "try_lock_mutex_query" as action;
+SET DEBUG_SYNC='now WAIT_FOR try_lock_mutex';
+SELECT SQL_NO_CACHE state FROM INFORMATION_SCHEMA.PROCESSLIST WHERE info='SELECT "try_lock_mutex_query" as action';
+state
+Waiting on query cache mutex
+SET DEBUG_SYNC='now SIGNAL unlock_mutex';
+action
+mutex_locked_query
+action
+try_lock_mutex_query
 SET GLOBAL query_cache_size=0;
diff --git a/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.test b/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.test
index 1e586ca4e7a..b20f088d6ae 100644
--- a/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.test
+++ b/mysql-test/suite/percona/query_cache_enhance.patch/percona_status_wait_query_cache_mutex.test
@@ -3,29 +3,33 @@
 --source include/have_debug_sync.inc
 SET GLOBAL query_cache_size=1355776;
 --source include/percona_query_cache_with_comments_clear.inc
+--let try_lock_mutex_query=SELECT "try_lock_mutex_query" as action
 
--- disable_warnings
-DROP TABLE IF EXISTS t;
--- enable_warnings
-CREATE TABLE t(id INT, number INT);
-INSERT INTO t VALUES (0,1);
-INSERT INTO t VALUES (1,2);
-INSERT INTO t VALUES (2,3);
+--connect (mutex_locked_conn, localhost, root,,)
+--connect (try_mutex_lock_conn, localhost, root,,)
 
---connect (conn,localhost,root,,)
-
---connection conn
-SET SESSION debug="+d,status_waiting_on_query_cache_mutex_sleep";
-SET DEBUG_SYNC='status_waiting_on_query_cache_mutex SIGNAL thread_ready';
-SEND SELECT number from t where id > 0;
+--connection mutex_locked_conn
+SET DEBUG_SYNC='after_query_cache_mutex SIGNAL mutex_locked WAIT_FOR unlock_mutex';
+send SELECT "mutex_locked_query" as action;
 
 --connection default
---replace_column 1 ### 3 ### 6 ### 9 ### 10 ### 11 ###
-SHOW PROCESSLIST;
+SET DEBUG_SYNC='now WAIT_FOR mutex_locked';
 
---replace_column 1 ###
-SELECT id, info, state FROM INFORMATION_SCHEMA.PROCESSLIST ORDER BY id;
+--connection try_mutex_lock_conn
+SET DEBUG_SYNC='before_query_cache_mutex SIGNAL try_lock_mutex';
+send_eval $try_lock_mutex_query;
 
---disconnect conn
-DROP TABLE t;
+--connection default
+SET DEBUG_SYNC='now WAIT_FOR try_lock_mutex';
+eval SELECT SQL_NO_CACHE state FROM INFORMATION_SCHEMA.PROCESSLIST WHERE info='$try_lock_mutex_query';
+SET DEBUG_SYNC='now SIGNAL unlock_mutex';
+
+--connection mutex_locked_conn
+reap;
+--connection try_mutex_lock_conn
+reap;
+
+--connection default
+--disconnect mutex_locked_conn
+--disconnect try_mutex_lock_conn
 SET GLOBAL query_cache_size=0;
diff --git a/mysql-test/suite/perfschema/r/all_instances.result b/mysql-test/suite/perfschema/r/all_instances.result
index 7eb2bc73d8e..59b1950cb88 100644
--- a/mysql-test/suite/perfschema/r/all_instances.result
+++ b/mysql-test/suite/perfschema/r/all_instances.result
@@ -1,5 +1,8 @@
 use performance_schema;
-select name from mutex_instances where name not rlike '/(DEBUG_SYNC::mutex)$' group by name;
+select name from mutex_instances
+where name not rlike '/(DEBUG_SYNC::mutex)$'
+   and name != 'wait/synch/mutex/mysys/BITMAP::mutex'
+ group by name;
 name
 wait/synch/mutex/archive/archive_mutex
 wait/synch/mutex/aria/LOCK_trn_list
@@ -16,7 +19,6 @@ wait/synch/mutex/blackhole/blackhole
 wait/synch/mutex/csv/tina
 wait/synch/mutex/memory/HP_SHARE::intern_lock
 wait/synch/mutex/myisam/MYISAM_SHARE::intern_lock
-wait/synch/mutex/mysys/BITMAP::mutex
 wait/synch/mutex/mysys/KEY_CACHE::cache_lock
 wait/synch/mutex/mysys/LOCK_alarm
 wait/synch/mutex/mysys/LOCK_uuid_generator
@@ -51,7 +53,6 @@ wait/synch/mutex/sql/LOCK_global_index_stats
 wait/synch/mutex/sql/LOCK_global_system_variables
 wait/synch/mutex/sql/LOCK_global_table_stats
 wait/synch/mutex/sql/LOCK_global_user_client_stats
-wait/synch/mutex/sql/LOCK_manager
 wait/synch/mutex/sql/LOCK_open
 wait/synch/mutex/sql/LOCK_plugin
 wait/synch/mutex/sql/LOCK_prepared_stmt_count
@@ -112,7 +113,6 @@ wait/synch/cond/mysys/COND_alarm
 wait/synch/cond/mysys/my_thread_var::suspend
 wait/synch/cond/mysys/THR_COND_threads
 wait/synch/cond/sql/COND_flush_thread_cache
-wait/synch/cond/sql/COND_manager
 wait/synch/cond/sql/COND_queue_state
 wait/synch/cond/sql/COND_rpl_status
 wait/synch/cond/sql/COND_server_started
diff --git a/mysql-test/suite/perfschema/r/server_init.result b/mysql-test/suite/perfschema/r/server_init.result
index 3e67915adcd..5497267080e 100644
--- a/mysql-test/suite/perfschema/r/server_init.result
+++ b/mysql-test/suite/perfschema/r/server_init.result
@@ -82,7 +82,7 @@ count(name)
 select count(name) from mutex_instances
 where name like "wait/synch/mutex/sql/LOCK_manager";
 count(name)
-1
+0
 select count(name) from mutex_instances
 where name like "wait/synch/mutex/sql/LOCK_global_system_variables";
 count(name)
@@ -170,7 +170,7 @@ count(name)
 select count(name) from cond_instances
 where name like "wait/synch/cond/sql/COND_manager";
 count(name)
-1
+0
 select count(name) from cond_instances
 where name like "wait/synch/cond/sql/COND_thread_cache";
 count(name)
diff --git a/mysql-test/suite/perfschema/t/all_instances.test b/mysql-test/suite/perfschema/t/all_instances.test
index d5dc6ffc2b2..53d542b6650 100644
--- a/mysql-test/suite/perfschema/t/all_instances.test
+++ b/mysql-test/suite/perfschema/t/all_instances.test
@@ -18,7 +18,10 @@ use performance_schema;
 # "where" filters out instances that can be conditionally compiled out
 #
 
-select name from mutex_instances where name not rlike '/(DEBUG_SYNC::mutex)$' group by name;
+select name from mutex_instances
+ where name not rlike '/(DEBUG_SYNC::mutex)$'
+   and name != 'wait/synch/mutex/mysys/BITMAP::mutex'
+ group by name;
 # CRYPTO_dynlock_value::lock exists only when building with OpenSSL (not YaSSL).
 select name from rwlock_instances
        where name not in ("wait/synch/rwlock/sql/CRYPTO_dynlock_value::lock")
diff --git a/mysql-test/suite/plugins/r/unix_socket.result b/mysql-test/suite/plugins/r/unix_socket.result
new file mode 100644
index 00000000000..45bf608cc93
--- /dev/null
+++ b/mysql-test/suite/plugins/r/unix_socket.result
@@ -0,0 +1,30 @@
+install plugin unix_socket soname 'auth_socket.so';
+#
+# with named user
+#
+create user USER identified via unix_socket;
+#
+# name match = ok
+#
+select user(), current_user(), database();
+user()	current_user()	database()
+USER@localhost	USER@%	test
+#
+# name does not match = failure
+#
+drop user USER;
+#
+# and now with anonymous user
+#
+grant SELECT ON test.* TO '' identified via unix_socket;
+#
+# name match = ok
+#
+select user(), current_user(), database();
+user()	current_user()	database()
+USER@localhost	@%	test
+#
+# name does not match = failure
+#
+delete from mysql.user where user='';
+uninstall plugin unix_socket;
diff --git a/mysql-test/suite/plugins/t/unix_socket.test b/mysql-test/suite/plugins/t/unix_socket.test
new file mode 100644
index 00000000000..fc2e6c5b3c6
--- /dev/null
+++ b/mysql-test/suite/plugins/t/unix_socket.test
@@ -0,0 +1,56 @@
+--source include/not_embedded.inc
+
+if (!$AUTH_SOCKET_SO) {
+  skip No auth_socket plugin;
+}
+
+let $plugindir=`SELECT @@global.plugin_dir`;
+
+eval install plugin unix_socket soname '$AUTH_SOCKET_SO';
+
+--echo #
+--echo # with named user
+--echo #
+
+--replace_result $USER USER
+eval create user $USER identified via unix_socket;
+
+--write_file $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+--replace_result $USER USER
+select user(), current_user(), database();
+EOF
+
+--echo #
+--echo # name match = ok
+--echo #
+--exec $MYSQL_TEST -u $USER --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+--echo #
+--echo # name does not match = failure
+--echo #
+--error 1
+--exec $MYSQL_TEST -u foobar --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+--replace_result $USER USER
+eval drop user $USER;
+
+--echo #
+--echo # and now with anonymous user
+--echo #
+grant SELECT ON test.* TO '' identified via unix_socket;
+--echo #
+--echo # name match = ok
+--echo #
+--exec $MYSQL_TEST -u $USER --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+--echo #
+--echo # name does not match = failure
+--echo #
+--error 1
+--exec $MYSQL_TEST -u foobar --plugin-dir=$plugindir < $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
+# restoring mysql.user to the original state.
+delete from mysql.user where user='';
+uninstall plugin unix_socket;
+--remove_file $MYSQLTEST_VARDIR/tmp/peercred_test.txt
+
diff --git a/mysql-test/suite/rpl/r/rpl_cant_read_event_incident.result b/mysql-test/suite/rpl/r/rpl_cant_read_event_incident.result
index 1bee6f2ec1a..bcae1c2c62b 100644
--- a/mysql-test/suite/rpl/r/rpl_cant_read_event_incident.result
+++ b/mysql-test/suite/rpl/r/rpl_cant_read_event_incident.result
@@ -1,12 +1,12 @@
 include/master-slave.inc
 [connection master]
+include/stop_slave.inc
 call mtr.add_suppression("Error in Log_event::read_log_event()");
 include/rpl_stop_server.inc [server_number=1]
 include/rpl_start_server.inc [server_number=1]
 show binlog events;
 ERROR HY000: Error when executing command SHOW BINLOG EVENTS: Wrong offset or I/O error
 call mtr.add_suppression("Slave I/O: Got fatal error 1236 from master when reading data from binary log");
-stop slave;
 reset slave;
 start slave;
 include/wait_for_slave_param.inc [Last_IO_Errno]
@@ -15,5 +15,5 @@ Last_IO_Error = 'Got fatal error 1236 from master when reading data from binary
 reset master;
 stop slave;
 reset slave;
-drop table t;
+drop table if exists t;
 End of the tests
diff --git a/mysql-test/suite/rpl/r/rpl_corruption.result b/mysql-test/suite/rpl/r/rpl_corruption.result
index 5ecf6b006c9..62f56e70993 100644
--- a/mysql-test/suite/rpl/r/rpl_corruption.result
+++ b/mysql-test/suite/rpl/r/rpl_corruption.result
@@ -25,14 +25,14 @@ SET GLOBAL debug_dbug="-d,corrupt_read_log_event2";
 SET GLOBAL master_verify_checksum=0;
 SET GLOBAL debug_dbug="+d,corrupt_read_log_event2";
 START SLAVE IO_THREAD;
-include/wait_for_slave_io_error.inc [errno=1595,1722,1923]
+include/wait_for_slave_io_error.inc [errno=1595,1913]
 SET GLOBAL debug_dbug="-d,corrupt_read_log_event2";
 SET GLOBAL debug_dbug= "";
 SET GLOBAL master_verify_checksum=1;
 # 5. Slave. Corruption in network
 SET GLOBAL debug_dbug="+d,corrupt_queue_event";
 START SLAVE IO_THREAD;
-include/wait_for_slave_io_error.inc [errno=1595,1722,1923]
+include/wait_for_slave_io_error.inc [errno=1595,1913]
 SET GLOBAL debug_dbug="-d,corrupt_queue_event";
 # 6. Slave. Corruption in relay log
 SET GLOBAL debug_dbug="+d,corrupt_read_log_event_char";
diff --git a/mysql-test/suite/rpl/r/rpl_rotate_purge_deadlock.result b/mysql-test/suite/rpl/r/rpl_rotate_purge_deadlock.result
index 34024f89617..1bda3bd3ee1 100644
--- a/mysql-test/suite/rpl/r/rpl_rotate_purge_deadlock.result
+++ b/mysql-test/suite/rpl/r/rpl_rotate_purge_deadlock.result
@@ -5,6 +5,7 @@ Log_name	File_size
 master-bin.000001	#
 create table t1 (f text) engine=innodb;
 SET DEBUG_SYNC = 'at_purge_logs_before_date WAIT_FOR rotated';
+SET DEBUG_SYNC = 'after_purge_logs_before_date SIGNAL continued';
 insert into t1 set f=repeat('a', 4096);
 *** there must be two logs in the list ***
 show binary logs;
@@ -19,11 +20,14 @@ master-bin.000001	#
 master-bin.000002	#
 master-bin.000003	#
 SET DEBUG_SYNC = 'now SIGNAL rotated';
+SET DEBUG_SYNC = 'now WAIT_FOR continued';
 SET DEBUG_SYNC = 'RESET';
 SET DEBUG_SYNC = 'RESET';
 SET DEBUG_SYNC = 'at_purge_logs_before_date WAIT_FOR rotated';
+SET DEBUG_SYNC = 'after_purge_logs_before_date SIGNAL continued';
 insert into t1 set f=repeat('b', 4096);
 SET DEBUG_SYNC = 'now SIGNAL rotated';
+SET DEBUG_SYNC = 'now WAIT_FOR continued';
 SET DEBUG_SYNC = 'RESET';
 SET DEBUG_SYNC = 'RESET';
 drop table t1;
diff --git a/mysql-test/suite/rpl/t/rpl_cant_read_event_incident.test b/mysql-test/suite/rpl/t/rpl_cant_read_event_incident.test
index 5e88b163d99..7d05ce251f2 100644
--- a/mysql-test/suite/rpl/t/rpl_cant_read_event_incident.test
+++ b/mysql-test/suite/rpl/t/rpl_cant_read_event_incident.test
@@ -20,9 +20,15 @@
 #
 --source include/not_windows.inc
 
-call mtr.add_suppression("Error in Log_event::read_log_event()");
+--connection slave
+# Make sure the slave is stopped while we are messing with master.
+# Otherwise we get occasional failures as the slave manages to re-connect
+# to the newly started master and we get extra events applied, causing
+# conflicts.
+--source include/stop_slave.inc
 
 --connection master
+call mtr.add_suppression("Error in Log_event::read_log_event()");
 --let $datadir= `SELECT @@datadir`
 
 --let $rpl_server_number= 1
@@ -42,7 +48,6 @@ show binlog events;
 
 --connection slave
 call mtr.add_suppression("Slave I/O: Got fatal error 1236 from master when reading data from binary log");
-stop slave;
 reset slave;
 start slave;
 
@@ -64,6 +69,12 @@ reset master;
 --connection slave
 stop slave;
 reset slave;
-drop table t; # table was created from binlog. it does not exist on master.
+# The table t may have been created on the slave from binlog. It does not exist
+# on the master.
+# "May", as it depends on whether the SQL thread had time do do the CREATE
+# TABLE before we stopped.
+--disable_warnings
+drop table if exists t;
+--enable_warnings
 
 --echo End of the tests
diff --git a/mysql-test/suite/rpl/t/rpl_corruption.test b/mysql-test/suite/rpl/t/rpl_corruption.test
index 458e3f10e67..c5625b4d002 100644
--- a/mysql-test/suite/rpl/t/rpl_corruption.test
+++ b/mysql-test/suite/rpl/t/rpl_corruption.test
@@ -115,7 +115,11 @@ SET GLOBAL master_verify_checksum=0;
 SET GLOBAL debug_dbug="+d,corrupt_read_log_event2";
 --connection slave
 START SLAVE IO_THREAD;
-let $slave_io_errno= 1595,1722,1923;
+# When the checksum error is detected, the slave sets error code 1913
+# (ER_NETWORK_READ_EVENT_CHECKSUM_FAILURE) in queue_event(), then immediately
+# sets error 1595 (ER_SLAVE_RELAY_LOG_WRITE_FAILURE) in handle_slave_io().
+# So we usually get 1595, but it is occasionally possible to get 1913.
+let $slave_io_errno= 1595,1913;
 --source include/wait_for_slave_io_error.inc
 --connection master
 SET GLOBAL debug_dbug="-d,corrupt_read_log_event2";
@@ -127,7 +131,7 @@ SET GLOBAL master_verify_checksum=1;
 --connection slave
 SET GLOBAL debug_dbug="+d,corrupt_queue_event";
 START SLAVE IO_THREAD;
-let $slave_io_errno= 1595,1722,1923;
+let $slave_io_errno= 1595,1913;
 --source include/wait_for_slave_io_error.inc
 SET GLOBAL debug_dbug="-d,corrupt_queue_event";
 
diff --git a/mysql-test/suite/rpl/t/rpl_rotate_purge_deadlock.test b/mysql-test/suite/rpl/t/rpl_rotate_purge_deadlock.test
index 429612c405f..a63844b451c 100644
--- a/mysql-test/suite/rpl/t/rpl_rotate_purge_deadlock.test
+++ b/mysql-test/suite/rpl/t/rpl_rotate_purge_deadlock.test
@@ -20,6 +20,7 @@ connection master;
 source include/show_binary_logs.inc;
 create table t1 (f text) engine=innodb;
 SET DEBUG_SYNC = 'at_purge_logs_before_date WAIT_FOR rotated';
+SET DEBUG_SYNC = 'after_purge_logs_before_date SIGNAL continued';
 send insert into t1 set f=repeat('a', 4096);
 
 connection master1;
@@ -38,6 +39,7 @@ insert into t1 set f=repeat('b', 4096);
 source include/show_binary_logs.inc;
 
 SET DEBUG_SYNC = 'now SIGNAL rotated';
+SET DEBUG_SYNC = 'now WAIT_FOR continued';
 SET DEBUG_SYNC = 'RESET';
 
 # the first connection finally completes its INSERT
@@ -54,6 +56,7 @@ sync_slave_with_master;
 
 connection master;
 SET DEBUG_SYNC = 'at_purge_logs_before_date WAIT_FOR rotated';
+SET DEBUG_SYNC = 'after_purge_logs_before_date SIGNAL continued';
 send insert into t1 set f=repeat('b', 4096);
 
 connection master1;
@@ -80,6 +83,7 @@ let $wait_condition=
 --source include/wait_condition.inc
 
 SET DEBUG_SYNC = 'now SIGNAL rotated';
+SET DEBUG_SYNC = 'now WAIT_FOR continued';
 SET DEBUG_SYNC = 'RESET';
 
 connection master;
diff --git a/mysql-test/suite/sys_vars/r/innodb_flush_checkpoint_debug_basic.result b/mysql-test/suite/sys_vars/r/innodb_flush_checkpoint_debug_basic.result
new file mode 100644
index 00000000000..e543cc30975
--- /dev/null
+++ b/mysql-test/suite/sys_vars/r/innodb_flush_checkpoint_debug_basic.result
@@ -0,0 +1,15 @@
+SELECT @@global.innodb_flush_checkpoint_debug;
+@@global.innodb_flush_checkpoint_debug
+0
+SET @@global.innodb_flush_checkpoint_debug=1;
+SELECT @@global.innodb_flush_checkpoint_debug;
+@@global.innodb_flush_checkpoint_debug
+1
+SET @@global.innodb_flush_checkpoint_debug=0;
+SELECT @@global.innodb_flush_checkpoint_debug;
+@@global.innodb_flush_checkpoint_debug
+0
+SET @@session.innodb_flush_checkpoint_debug=1;
+ERROR HY000: Variable 'innodb_flush_checkpoint_debug' is a GLOBAL variable and should be set with SET GLOBAL
+SELECT @@session.innodb_flush_checkpoint_debug;
+ERROR HY000: Variable 'innodb_flush_checkpoint_debug' is a GLOBAL variable
diff --git a/mysql-test/suite/sys_vars/t/innodb_flush_checkpoint_debug_basic.test b/mysql-test/suite/sys_vars/t/innodb_flush_checkpoint_debug_basic.test
new file mode 100644
index 00000000000..093a765e0e5
--- /dev/null
+++ b/mysql-test/suite/sys_vars/t/innodb_flush_checkpoint_debug_basic.test
@@ -0,0 +1,12 @@
+--source include/have_debug.inc
+--source include/have_xtradb.inc
+
+SELECT @@global.innodb_flush_checkpoint_debug;
+SET @@global.innodb_flush_checkpoint_debug=1;
+SELECT @@global.innodb_flush_checkpoint_debug;
+SET @@global.innodb_flush_checkpoint_debug=0;
+SELECT @@global.innodb_flush_checkpoint_debug;
+--error ER_GLOBAL_VARIABLE
+SET @@session.innodb_flush_checkpoint_debug=1;
+--error ER_INCORRECT_GLOBAL_LOCAL_VAR
+SELECT @@session.innodb_flush_checkpoint_debug;
diff --git a/mysql-test/suite/vcol/r/vcol_select_myisam.result b/mysql-test/suite/vcol/r/vcol_select_myisam.result
index d4868340ab5..934d047f6bf 100644
--- a/mysql-test/suite/vcol/r/vcol_select_myisam.result
+++ b/mysql-test/suite/vcol/r/vcol_select_myisam.result
@@ -265,3 +265,33 @@ NULL
 explain select sum(c) from t1 group by b;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	Using temporary; Using filesort
+#
+# Bug #806057: join with USING over a virtual column 
+#
+CREATE TABLE t1 (b int);
+INSERT INTO t1 VALUES (NULL),( 78), (185), (0), (154);
+CREATE TABLE t2 (a int, b int AS (a) VIRTUAL);
+INSERT INTO t2 VALUES (187,187), (9,9), (187,187);
+Warnings:
+Warning	1906	The value specified for computed column 'b' in table 't2' ignored
+Warning	1906	The value specified for computed column 'b' in table 't2' ignored
+Warning	1906	The value specified for computed column 'b' in table 't2' ignored
+EXPLAIN EXTENDED
+SELECT * FROM t1 JOIN t2 USING (b);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using join buffer (flat, BNL join)
+Warnings:
+Note	1003	select `test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`b` = `test`.`t2`.`b`)
+SELECT * FROM t1 JOIN t2 USING (b);
+b	a
+EXPLAIN EXTENDED
+SELECT * FROM t1 NATURAL JOIN t2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	t2	ALL	NULL	NULL	NULL	NULL	3	100.00	
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	5	100.00	Using where; Using join buffer (flat, BNL join)
+Warnings:
+Note	1003	select `test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where (`test`.`t1`.`b` = `test`.`t2`.`b`)
+SELECT * FROM t1 NATURAL JOIN t2;
+b	a
+DROP TABLE t1,t2;
diff --git a/mysql-test/suite/vcol/r/vcol_view_innodb.result b/mysql-test/suite/vcol/r/vcol_view_innodb.result
index fe666e0e400..c9a4897e230 100644
--- a/mysql-test/suite/vcol/r/vcol_view_innodb.result
+++ b/mysql-test/suite/vcol/r/vcol_view_innodb.result
@@ -107,7 +107,7 @@ MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
 MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
 explain select * from v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
 2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	4	Using filesort
 drop view v1;
 create view v1 as select c+1 from t1 order by 1 desc limit 2;
@@ -119,7 +119,7 @@ MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
 MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
 explain select * from v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
 2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	4	Using filesort
 drop view v1;
 drop table t1;
diff --git a/mysql-test/suite/vcol/r/vcol_view_myisam.result b/mysql-test/suite/vcol/r/vcol_view_myisam.result
index 78c20f79f5e..e3fb2ec61ca 100644
--- a/mysql-test/suite/vcol/r/vcol_view_myisam.result
+++ b/mysql-test/suite/vcol/r/vcol_view_myisam.result
@@ -107,7 +107,7 @@ MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
 MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
 explain select * from v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
 2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	4	Using filesort
 drop view v1;
 create view v1 as select c+1 from t1 order by 1 desc limit 2;
@@ -119,7 +119,7 @@ MariaDB-5.3: the following EXPLAIN produces incorrect #rows for table t1.
 MariaDB-5.3: this is expected to go away when FROM subquery optimizations are pushed
 explain select * from v1;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	2	
 2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	4	Using filesort
 drop view v1;
 drop table t1;
diff --git a/mysql-test/suite/vcol/t/vcol_select_myisam.test b/mysql-test/suite/vcol/t/vcol_select_myisam.test
index 855e02ac113..c14faba576d 100644
--- a/mysql-test/suite/vcol/t/vcol_select_myisam.test
+++ b/mysql-test/suite/vcol/t/vcol_select_myisam.test
@@ -48,3 +48,23 @@ eval SET @@session.storage_engine = 'MyISAM';
 #------------------------------------------------------------------------------#
 # Cleanup
 --source suite/vcol/inc/vcol_cleanup.inc
+
+--echo #
+--echo # Bug #806057: join with USING over a virtual column 
+--echo #
+
+CREATE TABLE t1 (b int);
+INSERT INTO t1 VALUES (NULL),( 78), (185), (0), (154);
+
+CREATE TABLE t2 (a int, b int AS (a) VIRTUAL);
+INSERT INTO t2 VALUES (187,187), (9,9), (187,187);
+
+EXPLAIN EXTENDED
+SELECT * FROM t1 JOIN t2 USING (b);
+SELECT * FROM t1 JOIN t2 USING (b);
+
+EXPLAIN EXTENDED
+SELECT * FROM t1 NATURAL JOIN t2;
+SELECT * FROM t1 NATURAL JOIN t2;
+
+DROP TABLE t1,t2;
diff --git a/mysql-test/t/derived_opt.test b/mysql-test/t/derived_opt.test
index 42f3ce296e1..c2f831036e1 100644
--- a/mysql-test/t/derived_opt.test
+++ b/mysql-test/t/derived_opt.test
@@ -202,5 +202,15 @@ RIGHT JOIN (
 
 drop table t1,t2,t3,t4;
 
+--echo #
+--echo # LP BUG#910123 MariaDB 5.3.3 causes 1093 error on Drupal
+--echo # Fix: force materialization in case of conflict
+--echo #
+SET optimizer_switch='derived_merge=on';
+CREATE TABLE t1 ( i INT );
+INSERT INTO t1 VALUES ( (SELECT 1 FROM ( SELECT * FROM t1 ) as a) );
+drop table t1;
+set optimizer_switch=@save_optimizer_switch;
+
 # The following command must be the last one the file 
 set optimizer_switch=@exit_optimizer_switch;
diff --git a/mysql-test/t/derived_view.test b/mysql-test/t/derived_view.test
index b674350af0a..95412426aa0 100644
--- a/mysql-test/t/derived_view.test
+++ b/mysql-test/t/derived_view.test
@@ -1192,7 +1192,7 @@ INSERT INTO t2 VALUES (7), (4);
 CREATE TABLE t1 (b int NOT NULL);
 INSERT INTO t1 VALUES (5), (7);
 CREATE ALGORITHM=MERGE VIEW v1 AS SELECT * FROM t1;
-
+SET @save_optimizer_switch=@@optimizer_switch;
 SET SESSION optimizer_switch='derived_merge=off';
 
 PREPARE st1 FROM
@@ -1201,10 +1201,12 @@ EXECUTE st1;
 EXECUTE st1;
 DEALLOCATE PREPARE st1;
 
+set SESSION optimizer_switch= @save_optimizer_switch;
+
 DROP VIEW v1;
 DROP TABLE t1,t2;
 
-SET SESSION optimizer_switch='derived_merge=on';
+
 
 --echo #
 --echo # LP bug #879939: assertion in ha_maria::enable_indexes 
@@ -1226,7 +1228,7 @@ INSERT INTO t1 VALUES
 
 CREATE TABLE t3 (a varchar(35));
 INSERT INTO t3 VALUES ('Miami');
-
+SET @save_optimizer_switch=@@optimizer_switch;
 SET optimizer_switch = 'derived_with_keys=on';
 SET @@tmp_table_size=1024*4;
 explain SELECT * FROM (SELECT t1.* FROM t1, t2) AS t JOIN t3 ON t3.a = t.b;
@@ -1234,7 +1236,7 @@ SELECT * FROM (SELECT t1.* FROM t1, t2) AS t JOIN t3 ON t3.a = t.b;
 SET @@tmp_table_size=1024*1024*16;
 SELECT * FROM (SELECT t1.* FROM t1, t2) AS t JOIN t3 ON t3.a = t.b;
 SET @@tmp_table_size=default;
-
+set SESSION optimizer_switch= @save_optimizer_switch;
 drop table t1,t2,t3;
 
 --echo #
@@ -1277,6 +1279,40 @@ ORDER BY CONCAT(alias2.col_varchar_nokey);
 set max_heap_table_size= @tmp_882994;
 drop table t1,t2,t3;
 
+--echo #
+--echo # LP bug #917990: Bad estimate of #rows for derived table with LIMIT
+--echo #
+
+CREATE TABLE t1 (a int);
+INSERT INTO t1 VALUES
+  (8), (3), (4), (7), (9), (5), (1), (2);
+
+SELECT * FROM (SELECT * FROM t1 LIMIT 3) t;
+EXPLAIN
+SELECT * FROM (SELECT * FROM t1 LIMIT 3) t;
+
+DROP TABLE t1;
+
+--echo #
+--echo # LP BUG#921878 incorrect check of items during columns union types
+--echo # aggregation for merged derived tables
+--echo #
+SET @save_optimizer_switch=@@optimizer_switch;
+SET SESSION optimizer_switch='derived_merge=on'; 
+CREATE TABLE t1 ( a ENUM( 'x', 'y' ) );
+insert into t1 values ('x');
+CREATE TABLE t2 LIKE t1;
+insert into t1 values ('y');
+CREATE TABLE t3 LIKE t1;
+INSERT INTO t3
+  SELECT * FROM ( SELECT * FROM t1 ) AS A
+    UNION SELECT * FROM t2;
+select * from t3;
+
+drop table t1,t2,t3;
+
+set SESSION optimizer_switch= @save_optimizer_switch;
+
 # The following command must be the last one the file 
 set optimizer_switch=@exit_optimizer_switch;
 set join_cache_level=@exit_join_cache_level;
diff --git a/mysql-test/t/func_group.test b/mysql-test/t/func_group.test
index 54535470d4c..7a098c44e5b 100644
--- a/mysql-test/t/func_group.test
+++ b/mysql-test/t/func_group.test
@@ -1153,6 +1153,53 @@ drop table t1;
 --echo #
 --echo End of 5.1 tests
 
+--echo #
+--echo # Bug #904345: MIN/MAX optimization  with constant FALSE condition
+--echo #
+
+CREATE TABLE t1 (a int NOT NULL, KEY(a));
+INSERT INTO t1 VALUES (10), (8), (11), (7), (15), (12), (9);
+
+CREATE TABLE t2 (a int, b int);
+INSERT INTO t2 VALUES
+  (8,2), (6,9), (8,4), (5,3), (9,1);
+
+EXPLAIN EXTENDED
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT 3,4) AND a<10;
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT 3,4) AND a<10;
+
+EXPLAIN EXTENDED
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT a,b FROM t2 WHERE b<5) and a<10; 
+SELECT MAX(a) FROM t1 WHERE (1,2) IN (SELECT a,b FROM t2 WHERE b<5) and a<10; 
+
+EXPLAIN EXTENDED
+SELECT MAX(a) FROM t1 WHERE RAND()*0<>0 AND a<10;
+SELECT MAX(a) FROM t1 WHERE RAND()*0<>0 AND a<10;
+
+DROP TABLE t1,t2;
+
+--echo #
+--echo # Bug #879860: MIN/MAX for subquery returning empty set 
+--echo #
+
+CREATE TABLE t1 (a int PRIMARY KEY);
+INSERT INTO t1 VALUES (1);
+
+CREATE TABLE t2 (a int NOT NULL);
+INSERT INTO t2 VALUES (10);
+
+CREATE TABLE t3 ( a int, b int);
+INSERT INTO t3 VALUES (19,1), (20,5);
+
+EXPLAIN EXTENDED
+SELECT (SELECT MIN(t1.a) FROM t1,t2 WHERE t2.a = t3.b) FROM t3;
+SELECT (SELECT MIN(t1.a) FROM t1,t2 WHERE t2.a = t3.b) FROM t3;
+
+DROP TABLE t1,t2,t3;
+
+--echo #
+--echo End of 5.2 tests
+
 --echo #
 --echo # BUG#46680 - Assertion failed in file item_subselect.cc, 
 --echo #             line 305 crashing on HAVING subquery
diff --git a/mysql-test/t/join_cache.test b/mysql-test/t/join_cache.test
index 4600da9ee17..668d0ca7891 100644
--- a/mysql-test/t/join_cache.test
+++ b/mysql-test/t/join_cache.test
@@ -3423,5 +3423,164 @@ SET optimizer_switch=@tmp_optimizer_switch;
 
 DROP TABLE t1,t2,t3,t4;
 
+--echo #
+--echo # Bug#53305 Duplicate weedout + join buffer (join cache --level=7,8)
+--echo #
+
+create table t1 (uid int, fid int, index(uid));
+insert into t1 values
+  (1,1), (1,2), (1,3), (1,4),
+  (2,5), (2,6), (2,7), (2,8),
+  (3,1), (3,2), (3,9);
+
+create table t2 (uid int primary key, name varchar(128), index(name));
+insert into t2 values 
+  (1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"),
+  (6, "F"), (7, "G"), (8, "H"), (9, "I");
+
+create table t3 (uid int, fid int, index(uid));
+insert into t3 values
+  (1,1), (1,2), (1,3),(1,4),
+  (2,5), (2,6), (2,7), (2,8),
+  (3,1), (3,2), (3,9);
+
+set @tmp_optimizer_switch=@@optimizer_switch;
+set  @@optimizer_switch='semijoin=on';
+set optimizer_switch='materialization=off';
+set optimizer_switch='loosescan=off,firstmatch=off';
+set optimizer_switch='mrr_sort_keys=off';
+set join_cache_level=7;
+
+create table t4 (uid int primary key, name varchar(128), index(name));
+insert into t4 values 
+  (1, "A"), (2, "B"), (3, "C"), (4, "D"), (5, "E"),
+  (6, "F"), (7, "G"), (8, "H"), (9, "I");
+
+explain select name from t2, t1 
+  where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid)
+        and t2.uid=t1.fid;
+
+--sorted_result
+select name from t2, t1 
+  where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid)
+        and t2.uid=t1.fid;
+
+set join_cache_level = default;
+set optimizer_switch=@tmp_optimizer_switch;
+
+drop table t1,t2,t3,t4;
+
+--echo #
+--echo # Bug#50358 - semijoin execution of subquery with outerjoin
+--echo #             emplying join buffer
+--echo #
+
+CREATE TABLE t1 (i int);
+CREATE TABLE t2 (i int);
+CREATE TABLE t3 (i int);
+INSERT INTO t1 VALUES (1), (2);
+INSERT INTO t2 VALUES (6);
+INSERT INTO t3 VALUES (1), (2);
+
+set @tmp_optimizer_switch=@@optimizer_switch;
+set  @@optimizer_switch='semijoin=on';
+set optimizer_switch='materialization=on';
+
+set join_cache_level=0;
+EXPLAIN
+SELECT * FROM t1 WHERE t1.i IN 
+                       (SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+SELECT * FROM t1 WHERE t1.i IN 
+                       (SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+
+set join_cache_level=2;
+EXPLAIN
+SELECT * FROM t1 WHERE t1.i IN 
+                       (SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+SELECT * FROM t1 WHERE t1.i IN 
+                       (SELECT t3.i FROM t3 LEFT JOIN t2 ON t2.i=t3.i);
+
+set join_cache_level = default;
+set optimizer_switch=@tmp_optimizer_switch;
+
+DROP TABLE t1,t2,t3;
+
+--echo #
+--echo # Bug #12546542: missing row with semijoin=off + join cache
+--echo # (LP bug #922971)
+--echo #
+
+CREATE TABLE t1 (a varchar(1024));
+INSERT INTO t1 VALUES ('v'), ('we');
+CREATE TABLE t2 (
+  a varchar(1024) CHARACTER SET utf8 DEFAULT NULL, b int, c int
+);
+INSERT INTO t2 VALUES ('we',4,NULL), ('v',1305673728,6);
+CREATE TABLE t3 (b int, c int);
+INSERT INTO t3 VALUES (4,4);
+
+set @tmp_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=off';
+set optimizer_switch='materialization=off';
+
+set join_cache_level=0;
+EXPLAIN
+SELECT * FROM t1
+  WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b 
+                WHERE t2.c < 10 OR t3.c > 1);
+
+SELECT * FROM t1
+  WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b 
+                WHERE t2.c < 10 OR t3.c > 1);
+
+set join_cache_level=2;
+EXPLAIN
+SELECT * FROM t1
+  WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b
+                WHERE t2.c < 10 OR t3.c > 1);
+SELECT * FROM t1
+  WHERE a IN (SELECT t2.a FROM t2 LEFT JOIN t3 ON t2.b = t3.b
+                WHERE t2.c < 10 OR t3.c > 1);
+
+set join_cache_level = default;
+set optimizer_switch=@tmp_optimizer_switch;
+
+DROP TABLE t1,t2,t3;
+
+--echo #
+--echo # Bug #925985: LEFT JOIN with optimize_join_buffer_size=off +
+--echo #              join_buffer_size > join_buffer_space_limit
+--echo #
+
+CREATE TABLE t1 (a int);
+INSERT INTO t1 VALUES (5), (3);
+
+CREATE TABLE t2 (a int, b int);
+INSERT INTO t2 VALUES
+  (3,30), (1,10), (7,70), (2,20),
+  (3,31), (1,11), (7,71), (2,21),
+  (3,32), (1,12), (7,72), (2,22);
+
+CREATE TABLE t3 (b int, c int);
+INSERT INTO t3 VALUES (32, 302), (42,400), (30,300);
+
+set @tmp_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='optimize_join_buffer_size=off';
+set join_buffer_space_limit=4096;
+set join_buffer_size=4096*2;
+set join_cache_level=2;
+set optimizer_switch='outer_join_with_cache=on';
+
+EXPLAIN
+SELECT * FROM t1, t2 LEFT JOIN t3 ON t2.b=t3.b WHERE t1.a=t2.a;
+SELECT * FROM t1, t2 LEFT JOIN t3 ON t2.b=t3.b WHERE t1.a=t2.a;
+  
+set join_buffer_space_limit=default;
+set join_buffer_size=default;
+set join_cache_level=default;
+set optimizer_switch=@tmp_optimizer_switch;
+
+DROP TABLE t1,t2,t3;
+
 # this must be the last command in the file
 set @@optimizer_switch=@save_optimizer_switch;
diff --git a/mysql-test/t/join_outer_innodb.test b/mysql-test/t/join_outer_innodb.test
index 0d47c4ea57b..c5cf66c816b 100644
--- a/mysql-test/t/join_outer_innodb.test
+++ b/mysql-test/t/join_outer_innodb.test
@@ -61,3 +61,18 @@ ORDER BY pk;
 DROP TABLE t1,t2;
 
 --echo # End BUG#58456
+
+#
+# Bug #848652: crash with RIGHT JOIN and GROUP BY
+# 
+
+CREATE TABLE t1(a int, b int, KEY (a), PRIMARY KEY (b))  ENGINE=InnoDB;
+
+CREATE TABLE t2 (b int, PRIMARY KEY (b));
+INSERT INTO t2 VALUES (4),(9);
+
+SELECT STRAIGHT_JOIN t1.a FROM t1 RIGHT JOIN t2 ON t1.b = t2.b
+  WHERE (t1.b NOT BETWEEN 1 AND 7 OR t1.a IS NULL AND t1.b = t2.b) AND t2.b = 4
+GROUP BY 1;
+
+DROP TABLE t1,t2;
diff --git a/mysql-test/t/key_cache.test b/mysql-test/t/key_cache.test
index 13367cbdcaa..83b4b0b1deb 100644
--- a/mysql-test/t/key_cache.test
+++ b/mysql-test/t/key_cache.test
@@ -522,3 +522,19 @@ set global key_buffer_size=@save_key_buffer_size;
 set global key_cache_segments=@save_key_cache_segments;
 
 # End of 5.2 tests
+
+--echo #
+--echo # Bug#12361113: crash when load index into cache
+--echo #
+
+--echo # Note that this creates an empty disabled key cache!
+SET GLOBAL key_cache_none.key_cache_block_size = 1024;
+CREATE TABLE t1 (a INT, b INTEGER NOT NULL, KEY (b) ) ENGINE = MYISAM;
+INSERT INTO t1 VALUES (1, 1);
+--error ER_UNKNOWN_KEY_CACHE
+CACHE INDEX t1 in key_cache_none;
+--echo # The bug crashed the server at LOAD INDEX below. Now it will succeed 
+--echo # since the default cache is used due to CACHE INDEX failed for
+--echo # key_cache_none.
+LOAD INDEX INTO CACHE t1;
+DROP TABLE t1;
diff --git a/mysql-test/t/myisam_mrr.test b/mysql-test/t/myisam_mrr.test
index 1e070ec9a34..28385c61b0f 100644
--- a/mysql-test/t/myisam_mrr.test
+++ b/mysql-test/t/myisam_mrr.test
@@ -268,5 +268,58 @@ set @@join_cache_level= @tmp_730133_jcl;
 set @@optimizer_switch= @tmp_730133_os;
 drop table t1;
 
+--echo #
+--echo # Test of MRR handler counters
+--echo #
+flush status;
+show status like 'Handler_mrr%';
+create table t0 (a int);
+insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+create table t1 (a int, b int, filler char(200), key(a));
+insert into t1 
+select A.a+10*B.a+100*C.a+1000*D.a, 123,'filler' from t0 A, t0 B, t0 C, t0 D;
+
+explain select sum(b) from t1 where a < 10;
+--echo # This should show one MRR scan and no re-fills:
+flush status;
+select sum(b) from t1 where a < 10;
+show status like 'handler_mrr%';
+
+set @mrr_buffer_size_save= @@mrr_buffer_size;
+--disable_warnings
+set mrr_buffer_size=128;
+--enable_warnings
+
+explain select sum(b) from t1 where a < 1600;
+--echo # This should show one MRR scan and one extra rowid sort:
+flush status;
+select sum(b) from t1 where a < 1600;
+show status like 'handler_mrr%';
+set @@mrr_buffer_size= @mrr_buffer_size_save;
+
+--echo #Now, let's check BKA: 
+set @join_cache_level_save= @@join_cache_level;
+set @join_buffer_size_save= @@join_buffer_size;
+set join_cache_level=6;
+
+explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
+flush status;
+select sum(t1.b) from t0,t1 where t0.a=t1.a;
+show status like 'handler_mrr%';
+
+--disable_warnings
+set join_buffer_size=10;
+--enable_warnings
+explain select sum(t1.b) from t0,t1 where t0.a=t1.a;
+flush status;
+select sum(t1.b) from t0,t1 where t0.a=t1.a;
+--replace_result 1 1or2 2 1or2
+show status like 'handler_mrr%';
+
+set join_cache_level= @join_cache_level_save;
+set join_buffer_size= @join_buffer_size_save;
+
+drop table t0, t1;
+
 ## This must be last line in the file:
 set optimizer_switch= @myisam_mrr_tmp;
diff --git a/mysql-test/t/mysqlcheck.test b/mysql-test/t/mysqlcheck.test
index ef88b89e8d8..c0025f9e742 100644
--- a/mysql-test/t/mysqlcheck.test
+++ b/mysql-test/t/mysqlcheck.test
@@ -147,6 +147,7 @@ SET NAMES DEFAULT;
 call mtr.add_suppression("@003f.frm' \\(errno: 22\\)");
 --echo mysqlcheck --default-character-set="latin1" --databases test
 # Error returned depends on platform, replace it with "Table doesn't exist"
+call mtr.add_suppression("Can't find file: '..test.@003f.frm'");
 --replace_result "Can't find file: './test/@003f.frm' (errno: 22)" "Table doesn't exist" "Table 'test.?' doesn't exist" "Table doesn't exist"
 --exec $MYSQL_CHECK --default-character-set="latin1" --databases test
 --echo mysqlcheck --default-character-set="utf8" --databases test
diff --git a/mysql-test/t/mysqldump.test b/mysql-test/t/mysqldump.test
index 302d79b6b13..424dd35a819 100644
--- a/mysql-test/t/mysqldump.test
+++ b/mysql-test/t/mysqldump.test
@@ -2249,8 +2249,12 @@ INSERT INTO b12809202_db.t2 VALUES (1), (2), (3);
 --echo #        commit starting 5.5.
 --echo
 --echo #### Dump starts here ####
+# We only need to check the --verbose output to verify that "start transaction"
+# happens after "logs flushed". We redirect normal output, as otherwise the
+# mixing of normal (stdout) and --verbose (stderr) output will happen in random
+# order depending on stdio internal buffer size.
 --replace_regex /-- Server version.*// /-- MySQL dump .*// /-- Dump completed on .*/-- Dump completed/
---exec $MYSQL_DUMP --verbose --single-transaction --flush-log b12809202_db 2>&1
+--exec $MYSQL_DUMP --verbose --single-transaction --flush-log b12809202_db 2>&1 > $MYSQLTEST_VARDIR/tmp/bug61854.sql
 --echo
 --echo #### Dump ends here ####
 
diff --git a/mysql-test/t/order_by.test b/mysql-test/t/order_by.test
index 82116558717..a6f50107cbe 100644
--- a/mysql-test/t/order_by.test
+++ b/mysql-test/t/order_by.test
@@ -1562,7 +1562,6 @@ select 1 order by max(1) + min(1);
 
 --echo End of 5.1 tests
 
-
 --echo #
 --echo # Bug #38745: MySQL 5.1 optimizer uses filesort for ORDER BY
 --echo #             when it should use index
@@ -1585,3 +1584,32 @@ SELECT t1.*, t2.* FROM t1 JOIN t2 ON t1.i1 = t2.i2
   ORDER BY t1.i1 LIMIT 5;
 
 DROP TABLE t1, t2, t3;
+
+--echo #
+--echo # Fix of LP BUG#793589 Wrong result with double ORDER BY
+--echo #
+CREATE TABLE t1 ( b int) ;
+INSERT INTO t1 VALUES (8),(9);
+
+CREATE TABLE t2 ( a int, b int, PRIMARY KEY (a)) ;
+INSERT INTO t2 VALUES (6,7),(7,7),(8,1),(9,7),(10,1),(11,5),(12,2),(13,0),(14,1),(15,8),(16,1),(17,1),(18,9),(19,1),(20,5);
+
+SELECT t2.b AS field1 FROM t1, t2 WHERE t1.b = t2.a GROUP BY field1 ORDER BY t1.b, field1;
+SELECT t2.b, t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b, t2.b;
+SELECT t2.b,t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+SELECT t2.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+
+--echo # field1 removed from ORDER BY
+explain extended
+SELECT t2.b AS field1 FROM t1, t2 WHERE t1.b = t2.a GROUP BY field1 ORDER BY t1.b, field1;
+explain extended
+SELECT t2.b, t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b, t2.b;
+explain extended
+SELECT t2.b,t1.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+explain extended
+SELECT t2.b FROM t1, t2 WHERE t1.b = t2.a GROUP BY t2.b ORDER BY t1.b;
+
+
+drop table t1,t2;
+
+--echo End of 5.2 tests
diff --git a/mysql-test/t/partition_key_cache.test b/mysql-test/t/partition_key_cache.test
index 4beb9506b05..067eb7fae59 100644
--- a/mysql-test/t/partition_key_cache.test
+++ b/mysql-test/t/partition_key_cache.test
@@ -239,6 +239,34 @@ CACHE INDEX t2 INDEX (`inx_b`) IN hot_cache;
 CACHE INDEX t1 PARTITION (p0) KEY (`inx_b`) IN hot_cache;
 CACHE INDEX t1 INDEX (`inx_b`) IN hot_cache;
 DROP TABLE t1,t2;
+
+--echo #
+--echo # Bug#12361113: crash when load index into cache
+--echo #
+--echo # Note that this creates an empty disabled key cache!
+SET GLOBAL key_cache_none.key_cache_block_size = 1024;
+CREATE TABLE t1 (a INT, b INTEGER NOT NULL, KEY (b) )
+ENGINE = MYISAM
+PARTITION BY HASH(a) PARTITIONS 2;
+INSERT INTO t1 VALUES (1, 1);
+--error ER_UNKNOWN_KEY_CACHE
+CACHE INDEX t1 IN key_cache_none;
+--error ER_UNKNOWN_KEY_CACHE
+CACHE INDEX t1 PARTITION (p0) IN key_cache_none;
+--error ER_UNKNOWN_KEY_CACHE
+CACHE INDEX t1 PARTITION (p1) IN key_cache_none;
+--error ER_UNKNOWN_KEY_CACHE
+CACHE INDEX t1 PARTITION (p0) KEY (`b`) IN key_cache_none;
+--error ER_UNKNOWN_KEY_CACHE
+CACHE INDEX t1 PARTITION (p1) KEY (`b`) IN key_cache_none;
+--echo # The bug crashed the server at LOAD INDEX below. Now it will succeed
+--echo # since the default cache is used due to CACHE INDEX failed for
+--echo # key_cache_none.
+LOAD INDEX INTO CACHE t1;
+DROP TABLE t1;
+
+
+--echo # Clean up
 SET GLOBAL hot_cache.key_buffer_size = 0;
 SET GLOBAL warm_cache.key_buffer_size = 0;
 SET @@global.cold_cache.key_buffer_size = 0;
diff --git a/mysql-test/t/partition_pruning.test b/mysql-test/t/partition_pruning.test
index da41b8e9428..1c8a4d254a8 100644
--- a/mysql-test/t/partition_pruning.test
+++ b/mysql-test/t/partition_pruning.test
@@ -1106,12 +1106,14 @@ show status like 'Handler_read_key';
 flush status;
 delete from t2 where b > 5;
 show status like 'Handler_read_rnd_next';
+show status like 'Handler_read_rnd_deleted';
 show status like 'Handler_read_key';
 show status like 'Handler_read_prev';
 show status like 'Handler_read_next';
 flush status;
 delete from t2 where b < 5 or b > 3;
 show status like 'Handler_read_rnd_next';
+show status like 'Handler_read_rnd_deleted';
 show status like 'Handler_read_key';
 show status like 'Handler_read_prev';
 show status like 'Handler_read_next';
diff --git a/mysql-test/t/status.test b/mysql-test/t/status.test
index 76769e78d90..9395323d32b 100644
--- a/mysql-test/t/status.test
+++ b/mysql-test/t/status.test
@@ -369,6 +369,16 @@ show status like 'Handler%';
 show status like '%tmp%';
 drop table t1;
 
+#
+# Test of handler status counts
+#
+CREATE TABLE t1 (i int(11) DEFAULT NULL, KEY i (i) ) ENGINE=MyISAM;
+insert into t1 values (1),(2),(3),(4),(5);
+flush status;
+select * from t1 where i=5 union select * from t1 where i=5;
+show status like "handler%";
+drop table t1;
+
 # End of 5.3 tests
 
 # Restore global concurrent_insert value. Keep in the end of the test file.
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index cb43eb9f646..40ecfead133 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -3519,6 +3519,8 @@ SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
 
 ## First a simpler query, illustrating the transformation
 ## '1 < some (...)' => '1 < max(...)'
+EXPLAIN EXTENDED
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
 SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t1);
 
 ## The query which made the server crash.
@@ -4431,8 +4433,6 @@ WHERE t1.a = d1.a;
 DROP TABLE t1;
 
 
---echo End of 5.1 tests.
-
 #
 # Bug #47904 Incorrect results w/ table subquery, derived SQs, and LEFT JOIN on index
 #
@@ -4879,11 +4879,141 @@ INSERT INTO t3 VALUES (0),(0);
 SELECT a1.f3 AS r FROM t2 AS a1 , t1 WHERE a1.f3 < ALL ( SELECT f3 FROM t3 WHERE f3 = 1 ) ;
 DROP TABLE t1, t2, t3;
 
+--echo #
+--echo # Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
+--echo #
+
+CREATE TABLE t1(a1 int);
+INSERT INTO t1 VALUES (1),(2);
+
+CREATE TABLE t2(a1 int);
+INSERT INTO t2 VALUES (3);
+
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+
+## All these are subject to the transformation
+## '1 < some (...)' => '1 < max(...)'
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
+SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
+
+SET SESSION sql_mode=@old_sql_mode;
+
+DROP TABLE t1, t2;
+
+create table t2(i int);
+insert into t2 values(0);
+
+SELECT @@session.sql_mode INTO @old_sql_mode;
+SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
+
+CREATE VIEW v1 AS  
+SELECT 'f' FROM t2 UNION SELECT 'x' FROM t2
+;
+
+CREATE TABLE t1 (
+  pk int NOT NULL,
+  col_varchar_key varchar(1) DEFAULT NULL,
+  PRIMARY KEY (pk),
+  KEY col_varchar_key (col_varchar_key)
+);
+
+SELECT t1.pk
+FROM t1
+WHERE t1.col_varchar_key < ALL ( SELECT * FROM v1 )
+;
+
+SET SESSION sql_mode=@old_sql_mode;
+
+drop table t2, t1;
+drop view v1;
+
+--echo #
+--echo # BUG#50257: Missing info in REF column of the EXPLAIN 
+--echo #            lines for subselects
+--echo #
+
+CREATE TABLE t1 (a INT, b INT, INDEX (a));
+INSERT INTO t1 VALUES (3, 10), (2, 20), (7, 10), (5, 20);
+
+EXPLAIN SELECT * FROM (SELECT * FROM t1 WHERE a=7) t;
+EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
+
+DROP TABLE t1;
+
+--echo #
+--echo # BUG#12616253 - WRONG RESULT WITH EXISTS(SUBQUERY) (MISSING ROWS)
+--echo # (duplicate of LP bug #888456)
+--echo #
+
+CREATE TABLE t1 (f1 varchar(1));
+INSERT INTO t1 VALUES ('v'),('s');
+
+CREATE TABLE t2 (f1_key varchar(1), KEY (f1_key));
+INSERT INTO t2 VALUES ('j'),('v'),('c'),('m'),('d'),
+('d'),('y'),('t'),('d'),('s');
+
+EXPLAIN
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+  WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+                  WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+SELECT table1.f1, table2.f1_key FROM t1 AS table1, t2 AS table2
+  WHERE EXISTS (SELECT DISTINCT f1_key FROM t2 
+                  WHERE f1_key != table2.f1_key AND f1_key >= table1.f1);
+
+DROP TABLE t1,t2;
+
+--echo #
+--echo # LP bug 919427: EXPLAIN for a query over a single-row table 
+--echo #                with IN subquery in WHERE condition
+--echo # 
+
+CREATE TABLE ot (
+  col_int_nokey int(11), 
+  col_varchar_nokey varchar(1)
+) ;
+INSERT INTO ot VALUES (1,'x');
+
+CREATE TABLE it1(
+  col_int_key int(11), 
+  col_varchar_key varchar(1), 
+  KEY idx_cvk_cik (col_varchar_key,col_int_key)
+);
+INSERT INTO it1 VALUES (NULL,'x'), (NULL,'f');
+
+CREATE TABLE it2 (
+   col_int_key int(11),
+   col_varchar_key varchar(1),
+   col_varchar_key2 varchar(1),
+   KEY idx_cvk_cvk2_cik (col_varchar_key, col_varchar_key2, col_int_key),
+   KEY idx_cvk_cik (col_varchar_key, col_int_key)
+);
+INSERT INTO it2 VALUES (NULL,'x','x'), (NULL,'f','f');
+
+EXPLAIN
+SELECT col_int_nokey FROM ot 
+  WHERE col_varchar_nokey IN 
+        (SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+SELECT col_int_nokey FROM ot 
+  WHERE col_varchar_nokey IN 
+        (SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
+
+EXPLAIN
+SELECT col_int_nokey FROM ot
+  WHERE (col_varchar_nokey, 'x') IN
+        (SELECT col_varchar_key, col_varchar_key2 FROM it2);
+SELECT col_int_nokey FROM ot
+  WHERE (col_varchar_nokey, 'x') IN
+        (SELECT col_varchar_key, col_varchar_key2 FROM it2);
+
+DROP TABLE ot,it1,it2;
+
 --echo End of 5.2 tests
 
 --echo #
 --echo # BUG#779885: Crash in eliminate_item_equal with materialization=on in
---echo # maria-5.3
 --echo #
 
 CREATE TABLE t1 ( f1 int );
@@ -4936,32 +5066,6 @@ SET optimizer_switch=@save_optimizer_switch;
 
 drop table t1, t2, t3;
 
---echo End of 5.3 tests
-
---echo #
---echo # Bug#12763207 - ASSERT IN SUBSELECT::SINGLE_VALUE_TRANSFORMER
---echo #
-
-CREATE TABLE t1(a1 int);
-INSERT INTO t1 VALUES (1),(2);
-
-CREATE TABLE t2(a1 int);
-INSERT INTO t2 VALUES (3);
-
-SELECT @@session.sql_mode INTO @old_sql_mode;
-SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
-
-## All these are subject to the transformation
-## '1 < some (...)' => '1 < max(...)'
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2 FROM t2);
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 2.0 FROM t2);
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT 'a' FROM t2);
-SELECT 1 FROM t1 WHERE 1 < SOME (SELECT a1 FROM t2);
-
-SET SESSION sql_mode=@old_sql_mode;
-
-DROP TABLE t1, t2;
-
 --echo #
 --echo # BUG#50257: Missing info in REF column of the EXPLAIN 
 --echo #            lines for subselects
@@ -4981,6 +5085,55 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS (SELECT * FROM t1 WHERE a=7);
 --echo
 DROP TABLE t1;
 
+--echo #
+--echo # Bug#11764086: Null left operand to NOT IN in WHERE clause
+--echo # behaves differently than real NULL
+--echo #
+
+CREATE TABLE parent (id int);
+INSERT INTO parent VALUES (1), (2);
+
+CREATE TABLE child (parent_id int, other int);
+INSERT INTO child VALUES (1,NULL);
+
+--echo # Offending query (c.parent_id is NULL for null-complemented rows only)
+
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id NOT IN (
+              SELECT parent_id 
+              FROM   child
+              WHERE  parent_id = 3
+          );
+
+--echo # Some syntactic variations with IS FALSE and IS NOT TRUE
+
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+              SELECT parent_id 
+              FROM   child
+              WHERE  parent_id = 3
+          ) IS NOT TRUE;
+
+SELECT    p.id, c.parent_id
+FROM      parent p
+LEFT JOIN child  c
+ON        p.id = c.parent_id
+WHERE     c.parent_id IN (
+              SELECT parent_id 
+              FROM   child
+              WHERE  parent_id = 3
+          ) IS FALSE;
+
+DROP TABLE parent, child;
+
+--echo # End of test for bug#11764086.
+
 --echo #
 --echo # Bug 11765699 - 58690: !TABLE || (!TABLE->READ_SET || 
 --echo #                BITMAP_IS_SET(TABLE->READ_SET, FIELD_INDEX
@@ -5279,6 +5432,17 @@ SELECT ( SELECT b FROM t2 WHERE b = a OR rand() * 0) FROM t1;
 
 drop table t1,t2,t3;
 
+--echo #
+--echo # LP BUG#905353 Wrong non-empty result with a constant table,
+--echo # aggregate function in subquery, MyISAM or Aria
+--echo #
+
+CREATE TABLE t1 ( a INT ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES (1);
+
+SELECT a FROM t1 WHERE ( SELECT MIN(a) = 100 );
+
+drop table t1;
 
 --echo # return optimizer switch changed in the beginning of this test
 set optimizer_switch=@subselect_tmp;
diff --git a/mysql-test/t/subselect_sj.test b/mysql-test/t/subselect_sj.test
index f34cf5ba338..6b8a757b9e8 100644
--- a/mysql-test/t/subselect_sj.test
+++ b/mysql-test/t/subselect_sj.test
@@ -1136,6 +1136,262 @@ WHERE (int_nokey, pk)
 
 DROP TABLE t1, t2, t3;
 
+--echo # 
+--echo # BUG#53060: LooseScan semijoin strategy does not return all rows
+--echo # 
+
+set @save_optimizer_switch=@@optimizer_switch;
+set optimizer_switch='semijoin=on,materialization=off';
+set optimizer_switch='firstmatch=off,loosescan=on';
+
+CREATE TABLE t1 (i INTEGER);
+INSERT INTO t1 VALUES (1), (2), (3), (4), (5);
+CREATE TABLE t2 (i INTEGER, j INTEGER, KEY k(i, j));
+INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);
+
+EXPLAIN
+SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
+SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);
+
+DROP TABLE t1, t2;
+
+set optimizer_switch=@save_optimizer_switch;
+
+--echo #
+--echo # BUG#49453: re-execution of prepared statement with view 
+--echo #            and semijoin crashes
+--echo #
+
+CREATE TABLE t1 (city VARCHAR(50), country_id INT);
+CREATE TABLE t2 (country_id INT, country VARCHAR(50));
+
+INSERT INTO t1 VALUES 
+  ('Batna',2),('Bchar',2),('Skikda',2),('Tafuna',3),('Algeria',2) ;
+INSERT INTO t2 VALUES (2,'Algeria'),(2,'AlgeriaDup'),(3,'XAmerican Samoa');
+
+CREATE VIEW v1 AS 
+  SELECT country_id as vf_country_id
+  FROM t2
+  WHERE LEFT(country,1) = "A"; 
+
+PREPARE stmt FROM "
+SELECT city, country_id
+FROM t1
+WHERE country_id IN (SELECT vf_country_id FROM v1);
+";
+
+--echo
+EXECUTE stmt;
+EXECUTE stmt;
+
+DROP TABLE t1,t2;
+DROP VIEW v1;
+
+--echo #
+--echo # Bug#54437 Extra rows with LEFT JOIN + semijoin 
+--echo #
+
+create table t1 (a int);
+create table t2 (a int);
+create table t3 (a int);
+insert into t1 values(1),(1);
+insert into t2 values(1),(1),(1),(1);
+insert into t3 values(2),(2);
+
+set @save_optimizer_switch=@@optimizer_switch;
+
+set optimizer_switch='materialization=off';
+
+set optimizer_switch='semijoin=off';
+explain
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+
+set optimizer_switch='semijoin=on';
+explain
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+select * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);
+
+set optimizer_switch=@save_optimizer_switch;
+
+drop table t1,t2,t3;
+
+--echo #
+--echo # Bug#55955: crash in MEMORY engine with IN(LEFT JOIN (JOIN))
+--echo #
+
+CREATE TABLE t1 (a INT);
+CREATE TABLE t2 (a INT);
+CREATE TABLE t3 (a INT);
+INSERT INTO t1 VALUES(1),(1);
+INSERT INTO t2 VALUES(1),(1);
+INSERT INTO t3 VALUES(2),(2);
+
+set @save_optimizer_switch=@@optimizer_switch;
+
+set optimizer_switch='semijoin=off,materialization=off';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+               FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+               FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+
+set optimizer_switch='semijoin=off,materialization=on';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+               FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+               FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+
+set optimizer_switch='semijoin=on,materialization=off';
+EXPLAIN
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+               FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+SELECT * FROM t1
+WHERE t1.a IN (SELECT t2.a
+               FROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);
+
+set optimizer_switch=@save_optimizer_switch;
+
+DROP TABLE t1,t2,t3;
+
+--echo #
+--echo # BUG#52329 - Wrong result: subquery materialization, IN, 
+--echo #             non-null field followed by nullable
+--echo #
+
+CREATE TABLE t1 (a1 CHAR(8) NOT NULL, a2 char(8) NOT NULL);
+
+CREATE TABLE t2a (b1 char(8), b2 char(8));
+CREATE TABLE t2b (b1 CHAR(8), b2 char(8) NOT NULL);
+CREATE TABLE t2c (b1 CHAR(8) NOT NULL, b2 char(8));
+
+INSERT INTO t1 VALUES ('1 - 12', '2 - 22');
+
+INSERT INTO t2a VALUES ('1 - 11', '2 - 21'),
+                       ('1 - 11', '2 - 21'),
+                       ('1 - 12', '2 - 22'),
+                       ('1 - 12', '2 - 22'),
+                       ('1 - 13', '2 - 23');
+
+INSERT INTO t2b SELECT * FROM t2a;
+INSERT INTO t2c SELECT * FROM t2a;
+
+set @save_optimizer_switch=@@optimizer_switch;
+
+set optimizer_switch='semijoin=off,materialization=on';
+
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+      SELECT b1, b2 FROM t2c WHERE b1 > '0' GROUP BY b1, b2);
+
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+      SELECT b1, b2 FROM t2a WHERE b1 > '0');
+
+
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+      SELECT b1, b2 FROM t2b WHERE b1 > '0');
+
+
+SELECT * FROM t1
+WHERE (a1, a2) IN (
+      SELECT b1, b2 FROM t2c WHERE b1 > '0');
+
+set optimizer_switch=@save_optimizer_switch;
+
+DROP TABLE t1,t2a,t2b,t2c;
+
+--echo #
+--echo # Bug#57623: subquery within before insert trigger causes crash (sj=on)
+--echo #
+
+CREATE TABLE ot1(a INT);
+CREATE TABLE ot2(a INT);
+CREATE TABLE ot3(a INT);
+CREATE TABLE it1(a INT);
+
+INSERT INTO ot1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
+INSERT INTO ot2 VALUES(0),(2),(4),(6);
+INSERT INTO ot3 VALUES(0),(3),(6);
+INSERT INTO it1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);
+
+let $query=
+SELECT *
+FROM   ot1
+     LEFT JOIN
+       (ot2 JOIN ot3 on ot2.a=ot3.a)
+     ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);
+
+set @save_optimizer_switch=@@optimizer_switch;
+
+set optimizer_switch='semijoin=on';
+
+set optimizer_switch='materialization=off';
+eval explain $query;
+eval $query;
+eval prepare s from '$query';
+execute s;
+execute s;
+deallocate prepare s;
+
+set optimizer_switch='materialization=on';
+eval explain $query;
+eval $query;
+eval prepare s from '$query';
+execute s;
+execute s;
+deallocate prepare s;
+
+set optimizer_switch=@save_optimizer_switch;
+
+DROP TABLE ot1, ot2, ot3, it1;
+
+--echo #
+--echo # Bug#59919/11766739: Crash in tmp_table_param::init() with semijoin=on
+--echo #
+
+CREATE TABLE t1 (f1 INTEGER) ENGINE=MyISAM;
+CREATE TABLE t2 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
+CREATE TABLE t3 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;
+
+INSERT INTO t1 VALUES (1);
+INSERT INTO t2 VALUES (1,1), (2,1);
+INSERT INTO t3 VALUES 
+  (1,1), (2,1), (5,4), (7,3), (8,2), (8,1), (7,3),
+  (9,5), (4,3), (7,2), (7,7), (3,1), (5,8), (9,7);
+
+set @save_optimizer_switch=@@optimizer_switch;
+
+set optimizer_switch='semijoin=off,materialization=on';
+EXPLAIN
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+             FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+             FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+
+set optimizer_switch='semijoin=on,materialization=on';
+EXPLAIN
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+             FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+SELECT * FROM t3
+WHERE f2 IN (SELECT t1.f1
+             FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);
+
+set optimizer_switch=@save_optimizer_switch;
+
+DROP TABLE t1, t2, t3 ;
+
+--echo #
 --echo #
 --echo # BUG#784723: Wrong result with semijoin + nested subqueries in maria-5.3  
 --echo #
@@ -2017,5 +2273,63 @@ SELECT a, COUNT(*) FROM t1
 
 DROP TABLE t1, t2, t3;
 
+--echo #
+--echo # BUG#920255: Wrong result (extra rows) with loosescan and IN subquery
+--echo #
+CREATE TABLE t1 ( a INT PRIMARY KEY, b INT, KEY(b) );
+INSERT INTO t1 VALUES
+  (1,2),(2,1),(3,3),(4,2),(5,5),
+  (6,3),(7,1),(8,4),(9,3),(10,2);
+
+CREATE TABLE t2 ( c INT, d INT, UNIQUE KEY(c) );
+INSERT INTO t2 VALUES
+  (1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);
+
+SELECT a, b, d FROM t1, t2
+WHERE ( b, d ) IN
+  ( SELECT b, d FROM t1, t2 WHERE b = c );
+
+DROP TABLE t1, t2;
+
+--echo #
+--echo # BUG#920713: Wrong result (missing rows) with firstmatch+BNL, IN subquery, ...
+--echo #
+# t1 should be MyISAM or InnoDB
+CREATE TABLE t1 ( a VARCHAR(1) ) ENGINE=MyISAM;
+INSERT INTO t1 VALUES ('e'),('w'),('a'),('h'),('x'),('k'),('g');
+CREATE TABLE t2 ( b INT, c VARCHAR(1) );
+INSERT INTO t2 VALUES (0,'j'),(8,'v');
+
+#SET debug_optimizer_prefer_join_prefix= 'alias2,alias4,alias1,alias3';
+
+SELECT * FROM t1 alias1, t2 alias2
+WHERE alias2.c IN (
+  SELECT alias4.c FROM t1 alias3, t2 alias4
+);
+
+DROP TABLE t1, t2;
+
+--echo #
+--echo # BUG#923246: Loosescan reports different result than other semijoin methods
+--echo #
+set @tmp_923246= @@optimizer_switch;
+set optimizer_switch='mrr=on,materialization=off';
+
+create table t0 (a int);
+insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
+
+create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));
+insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;
+insert into t1 select * from t1 where kp1 < 20;
+
+create table t3 (a int);
+insert into t3 select A.a + 10*B.a from t0 A, t0 B;
+
+select * from t3 where a in (select kp1 from t1 where kp1<20);
+explain select * from t3 where a in (select kp1 from t1 where kp1<20);
+
+drop table t0,t1,t3;
+set optimizer_switch= @tmp_923246;
+
 # The following command must be the last one the file 
 set optimizer_switch=@subselect_sj_tmp;
diff --git a/mysql-test/t/subselect_sj2.test b/mysql-test/t/subselect_sj2.test
index a77a70bbe4e..ede631f32be 100644
--- a/mysql-test/t/subselect_sj2.test
+++ b/mysql-test/t/subselect_sj2.test
@@ -1079,5 +1079,19 @@ SELECT * FROM t3 LEFT JOIN (v1,t2) ON t3.a = t2.a
 DROP VIEW v1;
 DROP TABLE t1,t2,t3,t4;
 
+--echo #
+--echo # BUG#912538: Wrong result (missing rows) with semijoin=on, firstmatch=on, ...
+--echo #
+CREATE TABLE t1 ( a INT NOT NULL, UNIQUE KEY(a) );
+INSERT INTO t1 VALUES (1),(2),(3),(4);
+
+# t2 needs to be InnoDB
+CREATE TABLE t2 ( b INT, c INT ) ENGINE=InnoDB;
+INSERT INTO t2 VALUES (1,1);
+
+SELECT * FROM t1, t2 WHERE c IN (SELECT c FROM t1, t2 WHERE a = b);
+
+DROP TABLE t1,t2;
+
 --echo # This must be the last in the file:
 set optimizer_switch=@subselect_sj2_tmp;
diff --git a/mysql-test/t/subselect_sj_jcl6.test b/mysql-test/t/subselect_sj_jcl6.test
index 4eeaa465b11..6d563cab3d3 100644
--- a/mysql-test/t/subselect_sj_jcl6.test
+++ b/mysql-test/t/subselect_sj_jcl6.test
@@ -88,6 +88,32 @@ set join_cache_level=default;
 
 DROP TABLE t1,t2,t3;
 
+--echo #
+--echo # BUG#912513: Wrong result (missing rows) with join_cache_hashed+materialization+semijoin=on
+--echo #
+set @os_912513= @@optimizer_switch;
+set @jcl_912513= @@join_cache_level;
+SET optimizer_switch = 'semijoin=on,materialization=on,join_cache_hashed=on';
+SET join_cache_level = 3;
+
+CREATE TABLE t1 ( a INT, b INT, KEY(a) );
+INSERT INTO t1 VALUES
+  (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7);
+
+CREATE TABLE t2 ( c INT );
+INSERT INTO t2 VALUES (1),(2),(3),(4),(5),(6),(7);
+
+SELECT alias1.* FROM
+    t1 AS alias1 INNER JOIN t1 AS alias2
+      ON alias2.a = alias1.b
+WHERE alias1.b IN (
+        SELECT a FROM t1, t2
+    );
+
+DROP table t1, t2;
+set @@optimizer_switch= @os_912513;
+set @@join_cache_level= @jcl_912513;
+
 --echo # End
 
 set join_cache_level=default;
diff --git a/mysql-test/t/subselect_sj_mat.test b/mysql-test/t/subselect_sj_mat.test
index 2a5b0f56877..0840029c5e0 100644
--- a/mysql-test/t/subselect_sj_mat.test
+++ b/mysql-test/t/subselect_sj_mat.test
@@ -1510,6 +1510,42 @@ SELECT * FROM t1 LEFT JOIN t2 ON ( a = b )
 
 DROP TABLE t1,t2;
 
+--echo #
+--echo # BUG#922254: Assertion `0' failed at item_cmpfunc.cc:5899: Item* Item_equal::get_first(JOIN_TAB*, Item*)
+--echo #
+CREATE TABLE t1 ( a VARCHAR(3) );
+CREATE TABLE t2 ( b VARCHAR(3), c VARCHAR(8), KEY(c) );
+INSERT INTO t2 VALUES ('USA','Abilene'),('USA','Akron');
+
+EXPLAIN
+SELECT * FROM
+  ( SELECT * FROM t1 ) AS alias1,
+  t2 AS alias2
+WHERE b = a AND a IN (
+  SELECT alias3.c
+  FROM t2 AS alias3, t2 AS alias4
+  WHERE alias4.c = alias3.b
+);
+
+DROP TABLE t1,t2;
+
+--echo #
+--echo # BUG#928048: Query containing IN subquery with OR in the where clause returns a wrong result
+--echo #
+create table t1 (a int, b int);
+insert into t1 values (7,5), (3,3), (5,4), (9,3);
+
+create table t2 (a int, b int, index i_a(a));
+
+insert into t2 values
+  (4,2), (7,9), (7,4), (3,1), (5,3), (3,1), (9,4), (8,1);
+
+explain select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
+select * from t1 where t1.a in (select a from t2 where t2.a=7 or t2.b<=1);
+
+drop table t1,t2;
+
+
 --echo # This must be at the end:
 set optimizer_switch=@subselect_sj_mat_tmp;
 set join_cache_level=@save_join_cache_level;
diff --git a/mysql-test/t/sum_distinct.test b/mysql-test/t/sum_distinct.test
index c58155a8e25..633a72fddc8 100644
--- a/mysql-test/t/sum_distinct.test
+++ b/mysql-test/t/sum_distinct.test
@@ -93,3 +93,15 @@ SELECT SUM(DISTINCT id) FROM t1;
 SELECT SUM(DISTINCT id % 11) FROM t1;
 
 DROP TABLE t1;
+
+--echo #
+--echo # Bug #777654: empty subselect in FROM clause returning  
+--echo #              SUM(DISTINCT) over non-nullable field 
+--echo #
+
+CREATE TABLE t1 (a int NOT NULL) ;
+
+SELECT SUM(DISTINCT a) FROM t1;
+SELECT * FROM (SELECT SUM(DISTINCT a) FROM t1) AS t;
+
+DROP TABLE t1;
diff --git a/mysql-test/t/view.test b/mysql-test/t/view.test
index 5fd8da745e4..79c733ed791 100644
--- a/mysql-test/t/view.test
+++ b/mysql-test/t/view.test
@@ -4018,6 +4018,59 @@ drop table t1,t2;
 --echo # -----------------------------------------------------------------
 --echo # -- End of 5.1 tests.
 --echo # -----------------------------------------------------------------
+--echo #
+--echo # Bug #794005: crash in st_table::mark_virtual_columns_for_write
+--echo #
+
+CREATE TABLE t1 (a int);
+insert into t1 values (1);
+CREATE TABLE t2 (a int);
+insert into t2 values (1);
+
+CREATE VIEW v2 AS SELECT * FROM t2;
+CREATE VIEW v1 AS SELECT * FROM v2;
+CREATE VIEW v3 AS SELECT t2.a,v1.a as b FROM t2,v1 where t2.a=v1.a;
+CREATE OR REPLACE ALGORITHM = TEMPTABLE VIEW v2 AS SELECT * FROM t1;
+
+--error ER_NON_UPDATABLE_TABLE
+UPDATE v1 SET a = 10;
+--error ER_NON_INSERTABLE_TABLE
+REPLACE v1 SET a = 10;
+--error ER_NON_INSERTABLE_TABLE
+INSERT into v1 values (20);
+--error ER_NON_UPDATABLE_TABLE
+DELETE from v1;
+--error ER_NON_UPDATABLE_TABLE
+UPDATE v3 SET b= 10;
+--error ER_NON_INSERTABLE_TABLE
+REPLACE v3 SET b= 10;
+--error ER_NON_INSERTABLE_TABLE
+INSERT into v3(b) values (20);
+--error ER_VIEW_DELETE_MERGE_VIEW
+DELETE from v3 where b=20;
+--error ER_VIEW_DELETE_MERGE_VIEW
+DELETE from v3 where a=20;
+--error ER_NON_UPDATABLE_TABLE
+DELETE v1 from v1,t1 where v1.a=t1.a;
+UPDATE v3 SET a = 10;
+REPLACE v3 SET a = 11;
+INSERT INTO v3(a) values (20);
+
+select * from t1;
+select * from t2;
+
+CREATE OR REPLACE ALGORITHM = MERGE VIEW v2 AS SELECT * FROM t2;
+DELETE from v1 where a=11;
+DELETE v1 from v1,t1 where v1.a=t1.a;
+select * from t1;
+select * from t2;
+
+DROP VIEW v1,v2,v3;
+DROP TABLE t1,t2;
+
+--echo # -----------------------------------------------------------------
+--echo # -- End of 5.2 tests.
+--echo # -----------------------------------------------------------------
 
 --echo #
 --echo # Bug #59696 Optimizer does not use equalities for conditions over view 
@@ -4493,4 +4546,8 @@ SELECT * FROM t1 RIGHT JOIN v2 ON ( v2.a = t1.a ) WHERE v2.b IN ( SELECT b FROM
 DROP VIEW v2;
 DROP TABLE t1, t2, t3;
 
+--echo # -----------------------------------------------------------------
+--echo # -- End of 5.3 tests.
+--echo # -----------------------------------------------------------------
+
 SET optimizer_switch=@save_optimizer_switch;
diff --git a/mysql-test/valgrind.supp b/mysql-test/valgrind.supp
index 6ee1167621a..b0d754211cd 100644
--- a/mysql-test/valgrind.supp
+++ b/mysql-test/valgrind.supp
@@ -413,133 +413,19 @@
    fun:__libc_start_main
 }
 
-{
-   dlclose memory loss from udf_free
-   Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_Z8udf_freev
-}
 
+#
+#  dlclose can allocate memory for error message, the memory will be
+#  freed by dlerror or other dl* function.
+#
 {
-   dlsym memory loss from udf_free on SuSE 11.1 x64 variant 2
+   memory "loss" from dlclose error messages
    Memcheck:Leak
-   fun:calloc
-   obj:/lib*/ld-*.so
-   fun:dlclose
-   fun:udf_free
-}
-
-{
-   dlclose memory loss from plugin variant 1
-   Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
-   fun:dlclose
-   fun:plugin_dl_del(st_mysql_lex_string const*)
-}
-
-{
-   dlclose memory loss from plugin variant 2
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_Z15free_plugin_memP12st_plugin_dl
-   fun:_Z13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 3
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_scope_free
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_Z15free_plugin_memP12st_plugin_dl
-   fun:_Z13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 4
-   Memcheck:Leak
-   fun:malloc
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/libdl-*.so
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 5
-   Memcheck:Leak
-   fun:malloc
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/libdl-*.so
+   fun:*alloc
+   ...
    fun:dlclose
 }
 
-{
-   dlclose memory loss from plugin variant 6, seen on Ubuntu Jaunty i686
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_scope_free
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:dlclose_doit
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 7, seen on Ubuntu Jaunty i686
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:dlclose_doit
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 8
-   Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_Z15free_plugin_memP12st_plugin_dl
-   fun:_Z13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 9
-   Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
 
 {
    dlclose memory loss from plugin variant 10
diff --git a/plugin/auth_dialog/dialog.c b/plugin/auth_dialog/dialog.c
index 2026369bc26..0fa5ab93a35 100644
--- a/plugin/auth_dialog/dialog.c
+++ b/plugin/auth_dialog/dialog.c
@@ -148,6 +148,8 @@ static int perform_dialog(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql)
     if (res)
       return CR_ERROR;
 
+    first= 0;
+
     /* repeat unless it was the last question */
   } while ((cmd & 1) != 1);
 
diff --git a/plugin/auth_pam/auth_pam.c b/plugin/auth_pam/auth_pam.c
index 45c49975f6e..ee13b37f793 100644
--- a/plugin/auth_pam/auth_pam.c
+++ b/plugin/auth_pam/auth_pam.c
@@ -1,5 +1,6 @@
 #include <mysql/plugin_auth.h>
 #include <string.h>
+#include <my_config.h>
 #include <security/pam_appl.h>
 #include <security/pam_modules.h>
 
@@ -8,6 +9,24 @@ struct param {
   MYSQL_PLUGIN_VIO *vio;
 };
 
+/* It least solaris doesn't have strndup */
+
+#ifndef HAVE_STRNDUP
+char *strndup(const char *from, size_t length)
+{
+  char *ptr;
+  size_t max_length= strlen(from);
+  if (length > max_length)
+    length= max_length;
+  if ((ptr= (char*) malloc(length+1)) != 0)
+  {
+    memcpy((char*) ptr, (char*) from, length);
+    ptr[length]=0;
+  }
+  return ptr;
+}
+#endif
+
 static int conv(int n, const struct pam_message **msg,
                 struct pam_response **resp, void *data)
 {
@@ -71,13 +90,21 @@ static int conv(int n, const struct pam_message **msg,
 
 #define DO(X) if ((status = (X)) != PAM_SUCCESS) goto end
 
+#ifdef SOLARIS
+typedef void** pam_get_item_3_arg;
+#else
+typedef const void** pam_get_item_3_arg;
+#endif
+
 static int pam_auth(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
 {
   pam_handle_t *pamh = NULL;
   int status;
   const char *new_username;
   struct param param;
-  struct pam_conv c = { &conv, &param };
+  /* The following is written in such a way to make also solaris happy */
+  struct pam_conv pam_start_arg = { &conv, NULL };
+  pam_start_arg.appdata_ptr= (char*) &param;
 
   /*
     get the service name, as specified in
@@ -90,10 +117,10 @@ static int pam_auth(MYSQL_PLUGIN_VIO *vio, MYSQL_SERVER_AUTH_INFO *info)
   param.ptr = param.buf + 1;
   param.vio = vio;
 
-  DO( pam_start(service, info->user_name, &c, &pamh) );
+  DO( pam_start(service, info->user_name, &pam_start_arg, &pamh) );
   DO( pam_authenticate (pamh, 0) );
   DO( pam_acct_mgmt(pamh, 0) );
-  DO( pam_get_item(pamh, PAM_USER, (const void**)&new_username) );
+  DO( pam_get_item(pamh, PAM_USER, (pam_get_item_3_arg) &new_username) );
 
   if (new_username && strcmp(new_username, info->user_name))
     strncpy(info->authenticated_as, new_username,
@@ -104,7 +131,7 @@ end:
   return status == PAM_SUCCESS ? CR_OK : CR_ERROR;
 }
 
-static struct st_mysql_auth pam_info =
+static struct st_mysql_auth info =
 {
   MYSQL_AUTHENTICATION_INTERFACE_VERSION,
   "dialog",
@@ -114,7 +141,7 @@ static struct st_mysql_auth pam_info =
 maria_declare_plugin(pam)
 {
   MYSQL_AUTHENTICATION_PLUGIN,
-  &pam_info,
+  &info,
   "pam",
   "Sergei Golubchik",
   "PAM based authentication",
diff --git a/plugin/auth_socket/auth_socket.c b/plugin/auth_socket/auth_socket.c
index dbc8513e5dd..41cb1039fd2 100644
--- a/plugin/auth_socket/auth_socket.c
+++ b/plugin/auth_socket/auth_socket.c
@@ -89,7 +89,7 @@ mysql_declare_plugin(socket_auth)
 {
   MYSQL_AUTHENTICATION_PLUGIN,
   &socket_auth_handler,
-  "auth_socket",
+  "unix_socket",
   "Sergei Golubchik",
   "Unix Socket based authentication",
   PLUGIN_LICENSE_GPL,
@@ -106,7 +106,7 @@ maria_declare_plugin(socket_auth)
 {
   MYSQL_AUTHENTICATION_PLUGIN,
   &socket_auth_handler,
-  "auth_socket",
+  "unix_socket",
   "Sergei Golubchik",
   "Unix Socket based authentication",
   PLUGIN_LICENSE_GPL,
diff --git a/sql/ha_partition.cc b/sql/ha_partition.cc
index f04c33ce90b..36d5da94b11 100644
--- a/sql/ha_partition.cc
+++ b/sql/ha_partition.cc
@@ -4069,6 +4069,8 @@ int ha_partition::rnd_next(uchar *buf)
   int result= HA_ERR_END_OF_FILE;
   uint part_id= m_part_spec.start_part;
   DBUG_ENTER("ha_partition::rnd_next");
+
+  /* upper level will increment this once again at end of call */
   decrement_statistics(&SSV::ha_read_rnd_next_count);
 
   if (NO_CURRENT_PART_ID == part_id)
diff --git a/sql/item.cc b/sql/item.cc
index 02cbe9b7f49..de4716350c2 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -5378,7 +5378,8 @@ bool Item_field::set_no_const_sub(uchar *arg)
 
 Item *Item_field::replace_equal_field(uchar *arg)
 {
-  if (item_equal && item_equal == (Item_equal *) arg)
+  REPLACE_EQUAL_FIELD_ARG* param= (REPLACE_EQUAL_FIELD_ARG*)arg;
+  if (item_equal && item_equal == param->item_equal)
   {
     Item *const_item= item_equal->get_const();
     if (const_item)
@@ -5387,7 +5388,8 @@ Item *Item_field::replace_equal_field(uchar *arg)
         return this;
       return const_item;
     }
-    Item_field *subst= (Item_field *)(item_equal->get_first(this));
+    Item_field *subst= 
+      (Item_field *)(item_equal->get_first(param->context_tab, this));
     if (subst)
       subst= (Item_field *) (subst->real_item());
     if (subst && !field->eq(subst->field))
@@ -9467,13 +9469,13 @@ void Item_type_holder::get_full_info(Item *item)
     DBUG_ASSERT((enum_set_typelib &&
                  get_real_type(item) == MYSQL_TYPE_NULL) ||
                 (!enum_set_typelib &&
-                 item->type() == Item::FIELD_ITEM &&
-                 (get_real_type(item) == MYSQL_TYPE_ENUM ||
-                  get_real_type(item) == MYSQL_TYPE_SET) &&
-                 ((Field_enum*)((Item_field *) item)->field)->typelib));
+                 item->real_item()->type() == Item::FIELD_ITEM &&
+                 (get_real_type(item->real_item()) == MYSQL_TYPE_ENUM ||
+                  get_real_type(item->real_item()) == MYSQL_TYPE_SET) &&
+                 ((Field_enum*)((Item_field *) item->real_item())->field)->typelib));
     if (!enum_set_typelib)
     {
-      enum_set_typelib= ((Field_enum*)((Item_field *) item)->field)->typelib;
+      enum_set_typelib= ((Field_enum*)((Item_field *) item->real_item())->field)->typelib;
     }
   }
 }
@@ -9558,18 +9560,22 @@ void Item_ref::update_used_tables()
 }
 
 
-table_map Item_direct_view_ref::used_tables() const		
+table_map Item_direct_view_ref::used_tables() const
 {
-  return get_depended_from() ? 
+  return get_depended_from() ?
          OUTER_REF_TABLE_BIT :
-         (view->merged ? (*ref)->used_tables() : view->table->map); 
+         ((view->merged || !view->table) ?
+          (*ref)->used_tables() :
+          view->table->map);
 }
 
-table_map Item_direct_view_ref::not_null_tables() const		
+table_map Item_direct_view_ref::not_null_tables() const
 {
-  return get_depended_from() ? 
+  return get_depended_from() ?
          0 :
-         (view->merged ? (*ref)->not_null_tables() : view->table->map); 
+         ((view->merged || !view->table) ?
+          (*ref)->not_null_tables() :
+          view->table->map);
 }
 
 /*
@@ -9583,6 +9589,8 @@ table_map Item_ref_null_helper::used_tables() const
 }
 
 
+#ifndef DBUG_OFF
+
 /* Debugger help function */
 static char dbug_item_print_buf[256];
 
@@ -9599,6 +9607,9 @@ const char *dbug_print_item(Item *item)
   else
     return "Couldn't fit into buffer";
 }
+
+#endif /*DBUG_OFF*/
+
 /*****************************************************************************
 ** Instantiate templates
 *****************************************************************************/
diff --git a/sql/item.h b/sql/item.h
index 4732a1a4657..6c0d3138b62 100644
--- a/sql/item.h
+++ b/sql/item.h
@@ -471,6 +471,16 @@ typedef enum monotonicity_info
 class sp_rcontext;
 
 
+class Item_equal;
+
+struct st_join_table* const NO_PARTICULAR_TAB= (struct st_join_table*)0x1;
+
+typedef struct replace_equal_field_arg 
+{
+  Item_equal *item_equal;
+  struct st_join_table *context_tab;
+} REPLACE_EQUAL_FIELD_ARG;
+
 class Settable_routine_parameter
 {
 public:
@@ -1283,6 +1293,7 @@ public:
 
   virtual Item *equal_fields_propagator(uchar * arg) { return this; }
   virtual bool set_no_const_sub(uchar *arg) { return FALSE; }
+  /* arg points to REPLACE_EQUAL_FIELD_ARG object */
   virtual Item *replace_equal_field(uchar * arg) { return this; }
   /*
     Check if an expression value has allowed arguments, like DATE/DATETIME
diff --git a/sql/item_cmpfunc.cc b/sql/item_cmpfunc.cc
index b3954c55394..4ea5e9534a8 100644
--- a/sql/item_cmpfunc.cc
+++ b/sql/item_cmpfunc.cc
@@ -5804,7 +5804,7 @@ longlong Item_equal::val_int()
 
 void Item_equal::fix_length_and_dec()
 {
-  Item *item= get_first(NULL);
+  Item *item= get_first(NO_PARTICULAR_TAB, NULL);
   eval_item= cmp_item::get_comparator(item->cmp_type(), item,
                                       item->collation.collation);
 }
@@ -5904,7 +5904,7 @@ CHARSET_INFO *Item_equal::compare_collation()
   @retval 0 if no field found.
 */
 
-Item* Item_equal::get_first(Item *field_item)
+Item* Item_equal::get_first(JOIN_TAB *context, Item *field_item)
 {
   Item_equal_fields_iterator it(*this);
   Item *item;
@@ -5932,18 +5932,24 @@ Item* Item_equal::get_first(Item *field_item)
     in presense of SJM nests.
   */
 
-  TABLE_LIST *emb_nest= field->table->pos_in_table_list->embedding;
+  TABLE_LIST *emb_nest;
+  if (context != NO_PARTICULAR_TAB)
+    emb_nest= context->emb_sj_nest;
+  else
+    emb_nest= field->table->pos_in_table_list->embedding;
 
   if (emb_nest && emb_nest->sj_mat_info && emb_nest->sj_mat_info->is_used)
   {
     /*
-      It's a field from an materialized semi-join. We can substitute it only
-      for a field from the same semi-join. Find the first of such items.
+      It's a field from an materialized semi-join. We can substitute it for
+       - a constant item 
+       - a field from the same semi-join
+       Find the first of such items:
     */
-
     while ((item= it++))
     {
-      if (it.get_curr_field()->table->pos_in_table_list->embedding == emb_nest)
+      if (item->const_item() || 
+          it.get_curr_field()->table->pos_in_table_list->embedding == emb_nest)
       {
         /*
           If we found given field then return NULL to avoid unnecessary
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h
index 7b2193b1acd..384c91d5d2e 100644
--- a/sql/item_cmpfunc.h
+++ b/sql/item_cmpfunc.h
@@ -1705,7 +1705,7 @@ public:
   /** Add a non-constant item to the multiple equality */
   void add(Item *f) { equal_items.push_back(f); }
   bool contains(Field *field);
-  Item* get_first(Item *field);
+  Item* get_first(struct st_join_table *context, Item *field);
   /** Get number of field items / references to field items in this object */   
   uint n_field_items() { return equal_items.elements-test(with_const); }
   void merge(Item_equal *item);
diff --git a/sql/item_subselect.cc b/sql/item_subselect.cc
index 5f78cdf167b..50625286348 100644
--- a/sql/item_subselect.cc
+++ b/sql/item_subselect.cc
@@ -1271,7 +1271,8 @@ void Item_exists_subselect::fix_length_and_dec()
     We need only 1 row to determine existence (i.e. any EXISTS that is not
     an IN always requires LIMIT 1)
   */
-  unit->global_parameters->select_limit= new Item_int((int32) 1);
+  thd->change_item_tree(&unit->global_parameters->select_limit,
+                        new Item_int((int32) 1));
   DBUG_PRINT("info", ("Set limit to 1"));
   DBUG_VOID_RETURN;
 }
@@ -1597,7 +1598,6 @@ Item_in_subselect::single_value_transformer(JOIN *join)
                               (Item**)optimizer->get_cache(),
 			      (char *)"<no matter>",
 			      (char *)in_left_expr_name);
-
   }
 
   DBUG_RETURN(false);
@@ -1684,10 +1684,6 @@ bool Item_allany_subselect::transform_into_max_min(JOIN *join)
 
     DBUG_EXECUTE("where",
                  print_where(item, "rewrite with MIN/MAX", QT_ORDINARY););
-    if (thd->variables.sql_mode & MODE_ONLY_FULL_GROUP_BY)
-    {
-      select_lex->set_non_agg_field_used(false);
-    }
 
     save_allow_sum_func= thd->lex->allow_sum_func;
     thd->lex->allow_sum_func|= 1 << thd->lex->current_select->nest_level;
@@ -2244,7 +2240,12 @@ bool Item_in_subselect::create_in_to_exists_cond(JOIN *join_arg)
   /*
     The IN=>EXISTS transformation makes non-correlated subqueries correlated.
   */
-  join_arg->select_lex->uncacheable|= UNCACHEABLE_DEPENDENT_INJECTED;
+  if (!left_expr->const_item() || left_expr->is_expensive())
+  {
+    join_arg->select_lex->uncacheable|= UNCACHEABLE_DEPENDENT_INJECTED;
+    join_arg->select_lex->master_unit()->uncacheable|= 
+                                         UNCACHEABLE_DEPENDENT_INJECTED;
+  }
   /*
     The uncacheable property controls a number of actions, e.g. whether to
     save/restore (via init_save_join_tab/restore_tmp) the original JOIN for
@@ -2510,6 +2511,7 @@ bool Item_in_subselect::fix_fields(THD *thd_arg, Item **ref)
       left_expr && !left_expr->fixed &&
       left_expr->fix_fields(thd_arg, &left_expr))
     return TRUE;
+  else
   if (Item_subselect::fix_fields(thd_arg, ref))
     return TRUE;
   fixed= TRUE;
@@ -3159,6 +3161,8 @@ bool subselect_uniquesubquery_engine::copy_ref_key()
 
   for (store_key **copy= tab->ref.key_copy ; *copy ; copy++)
   {
+    if ((*copy)->store_key_is_const())
+      continue;
     tab->ref.key_err= (*copy)->copy();
 
     /*
diff --git a/sql/item_sum.cc b/sql/item_sum.cc
index 6e115854f17..afe4f34bd05 100644
--- a/sql/item_sum.cc
+++ b/sql/item_sum.cc
@@ -1129,13 +1129,12 @@ Item_sum_num::fix_fields(THD *thd, Item **ref)
     return TRUE;
 
   decimals=0;
-  maybe_null=0;
+  maybe_null= sum_func() != COUNT_FUNC;
   for (uint i=0 ; i < arg_count ; i++)
   {
     if (args[i]->fix_fields(thd, args + i) || args[i]->check_cols(1))
       return TRUE;
     set_if_bigger(decimals, args[i]->decimals);
-    maybe_null |= args[i]->maybe_null;
   }
   result_field=0;
   max_length=float_length(decimals);
diff --git a/sql/log.cc b/sql/log.cc
index af400c19f4a..9e9716dde67 100644
--- a/sql/log.cc
+++ b/sql/log.cc
@@ -5372,6 +5372,7 @@ void MYSQL_BIN_LOG::purge()
     {
       purge_logs_before_date(purge_time);
     }
+    DEBUG_SYNC(current_thd, "after_purge_logs_before_date");
   }
 #endif
 }
diff --git a/sql/multi_range_read.cc b/sql/multi_range_read.cc
index d8dc45d38c7..29e7faa630d 100644
--- a/sql/multi_range_read.cc
+++ b/sql/multi_range_read.cc
@@ -482,6 +482,10 @@ void Mrr_ordered_index_reader::resume_read()
 
 /**
   Fill the buffer with (lookup_tuple, range_id) pairs and sort
+
+  @return 
+    0                   OK, the buffer is non-empty and sorted
+    HA_ERR_END_OF_FILE  Source exhausted, the buffer is empty.
 */
 
 int Mrr_ordered_index_reader::refill_buffer(bool initial)
@@ -518,6 +522,13 @@ int Mrr_ordered_index_reader::refill_buffer(bool initial)
   if (source_exhausted && key_buffer->is_empty())
     DBUG_RETURN(HA_ERR_END_OF_FILE);
 
+  if (!initial)
+  {
+    /* This is a non-initial buffer fill and we've got a non-empty buffer */
+    THD *thd= current_thd;
+    status_var_increment(thd->status_var.ha_mrr_extra_key_sorts);
+  }
+
   key_buffer->sort((key_buffer->type() == Lifo_buffer::FORWARD)? 
                      (qsort2_cmp)Mrr_ordered_index_reader::compare_keys_reverse : 
                      (qsort2_cmp)Mrr_ordered_index_reader::compare_keys, 
@@ -592,6 +603,7 @@ int Mrr_ordered_rndpos_reader::init(handler *h_arg,
 int Mrr_ordered_rndpos_reader::refill_buffer(bool initial)
 {
   int res;
+  bool first_call= initial;
   DBUG_ENTER("Mrr_ordered_rndpos_reader::refill_buffer");
 
   if (index_reader_exhausted)
@@ -609,6 +621,14 @@ int Mrr_ordered_rndpos_reader::refill_buffer(bool initial)
     initial= FALSE;
     index_reader_needs_refill= FALSE;
   }
+
+  if (!first_call && !index_reader_exhausted)
+  {
+    /* Ok, this was a successful buffer refill operation */
+    THD *thd= current_thd;
+    status_var_increment(thd->status_var.ha_mrr_extra_rowid_sorts);
+  }
+
   DBUG_RETURN(res);
 }
 
@@ -841,8 +861,7 @@ int DsMrr_impl::dsmrr_init(handler *h_arg, RANGE_SEQ_IF *seq_funcs,
     strategy= disk_strategy= &reader_factory.ordered_rndpos_reader;
   }
 
-  if (is_mrr_assoc)
-    status_var_increment(thd->status_var.ha_multi_range_read_init_count);
+  status_var_increment(thd->status_var.ha_multi_range_read_init_count);
 
   full_buf= buf->buffer;
   full_buf_end= buf->buffer_end;
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index 2a2361a3d28..df3be29f547 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -1884,7 +1884,6 @@ static void clean_up_mutexes()
   mysql_mutex_destroy(&LOCK_delayed_insert);
   mysql_mutex_destroy(&LOCK_delayed_status);
   mysql_mutex_destroy(&LOCK_delayed_create);
-  mysql_mutex_destroy(&LOCK_manager);
   mysql_mutex_destroy(&LOCK_crypt);
   mysql_mutex_destroy(&LOCK_user_conn);
   mysql_mutex_destroy(&LOCK_connection_count);
@@ -1915,7 +1914,6 @@ static void clean_up_mutexes()
   mysql_cond_destroy(&COND_thread_count);
   mysql_cond_destroy(&COND_thread_cache);
   mysql_cond_destroy(&COND_flush_thread_cache);
-  mysql_cond_destroy(&COND_manager);
   mysql_mutex_destroy(&LOCK_server_started);
   mysql_cond_destroy(&COND_server_started);
   mysql_mutex_destroy(&LOCK_prepare_ordered);
@@ -3777,8 +3775,6 @@ static int init_thread_environment()
                    &LOCK_delayed_status, MY_MUTEX_INIT_FAST);
   mysql_mutex_init(key_LOCK_delayed_create,
                    &LOCK_delayed_create, MY_MUTEX_INIT_SLOW);
-  mysql_mutex_init(key_LOCK_manager,
-                   &LOCK_manager, MY_MUTEX_INIT_FAST);
   mysql_mutex_init(key_LOCK_crypt, &LOCK_crypt, MY_MUTEX_INIT_FAST);
   mysql_mutex_init(key_LOCK_user_conn, &LOCK_user_conn, MY_MUTEX_INIT_FAST);
   mysql_mutex_init(key_LOCK_active_mi, &LOCK_active_mi, MY_MUTEX_INIT_FAST);
@@ -3827,7 +3823,6 @@ static int init_thread_environment()
   mysql_cond_init(key_COND_thread_count, &COND_thread_count, NULL);
   mysql_cond_init(key_COND_thread_cache, &COND_thread_cache, NULL);
   mysql_cond_init(key_COND_flush_thread_cache, &COND_flush_thread_cache, NULL);
-  mysql_cond_init(key_COND_manager, &COND_manager, NULL);
 #ifdef HAVE_REPLICATION
   mysql_mutex_init(key_LOCK_rpl_status, &LOCK_rpl_status, MY_MUTEX_INIT_FAST);
   mysql_cond_init(key_COND_rpl_status, &COND_rpl_status, NULL);
@@ -6886,6 +6881,12 @@ SHOW_VAR status_vars[]= {
   {"Handler_commit",           (char*) offsetof(STATUS_VAR, ha_commit_count), SHOW_LONG_STATUS},
   {"Handler_delete",           (char*) offsetof(STATUS_VAR, ha_delete_count), SHOW_LONG_STATUS},
   {"Handler_discover",         (char*) offsetof(STATUS_VAR, ha_discover_count), SHOW_LONG_STATUS},
+#if 0
+  /* Made 3 counters below temporarily invisible until we agree upon their names */
+  {"Handler_mrr_extra_key_sorts",   (char*) offsetof(STATUS_VAR, ha_mrr_extra_key_sorts), SHOW_LONG_STATUS},
+  {"Handler_mrr_extra_rowid_sorts", (char*) offsetof(STATUS_VAR, ha_mrr_extra_rowid_sorts), SHOW_LONG_STATUS},
+  {"Handler_mrr_init",         (char*) offsetof(STATUS_VAR, ha_multi_range_read_init_count),  SHOW_LONG_STATUS},
+#endif
   {"Handler_prepare",          (char*) offsetof(STATUS_VAR, ha_prepare_count),  SHOW_LONG_STATUS},
   {"Handler_read_first",       (char*) offsetof(STATUS_VAR, ha_read_first_count), SHOW_LONG_STATUS},
   {"Handler_read_key",         (char*) offsetof(STATUS_VAR, ha_read_key_count), SHOW_LONG_STATUS},
@@ -6893,14 +6894,15 @@ SHOW_VAR status_vars[]= {
   {"Handler_read_next",        (char*) offsetof(STATUS_VAR, ha_read_next_count), SHOW_LONG_STATUS},
   {"Handler_read_prev",        (char*) offsetof(STATUS_VAR, ha_read_prev_count), SHOW_LONG_STATUS},
   {"Handler_read_rnd",         (char*) offsetof(STATUS_VAR, ha_read_rnd_count), SHOW_LONG_STATUS},
+  {"Handler_read_rnd_deleted", (char*) offsetof(STATUS_VAR, ha_read_rnd_deleted_count), SHOW_LONG_STATUS},
   {"Handler_read_rnd_next",    (char*) offsetof(STATUS_VAR, ha_read_rnd_next_count), SHOW_LONG_STATUS},
   {"Handler_rollback",         (char*) offsetof(STATUS_VAR, ha_rollback_count), SHOW_LONG_STATUS},
   {"Handler_savepoint",        (char*) offsetof(STATUS_VAR, ha_savepoint_count), SHOW_LONG_STATUS},
   {"Handler_savepoint_rollback",(char*) offsetof(STATUS_VAR, ha_savepoint_rollback_count), SHOW_LONG_STATUS},
-  {"Handler_update",           (char*) offsetof(STATUS_VAR, ha_update_count), SHOW_LONG_STATUS},
-  {"Handler_write",            (char*) offsetof(STATUS_VAR, ha_write_count), SHOW_LONG_STATUS},
   {"Handler_tmp_update",       (char*) offsetof(STATUS_VAR, ha_tmp_update_count), SHOW_LONG_STATUS},
   {"Handler_tmp_write",        (char*) offsetof(STATUS_VAR, ha_tmp_write_count), SHOW_LONG_STATUS},
+  {"Handler_update",           (char*) offsetof(STATUS_VAR, ha_update_count), SHOW_LONG_STATUS},
+  {"Handler_write",            (char*) offsetof(STATUS_VAR, ha_write_count), SHOW_LONG_STATUS},
   {"Key",                      (char*) &show_default_keycache, SHOW_FUNC},
   {"Last_query_cost",          (char*) offsetof(STATUS_VAR, last_query_cost), SHOW_DOUBLE_STATUS},
   {"Max_used_connections",     (char*) &max_used_connections,  SHOW_LONG},
diff --git a/sql/opt_subselect.cc b/sql/opt_subselect.cc
index 3b1991d1686..6376b1ac33f 100644
--- a/sql/opt_subselect.cc
+++ b/sql/opt_subselect.cc
@@ -4080,7 +4080,8 @@ int setup_semijoin_dups_elimination(JOIN *join, ulonglong options,
 {
   uint i;
   DBUG_ENTER("setup_semijoin_dups_elimination");
-
+  
+  join->complex_firstmatch_tables= table_map(0);
 
   POSITION *pos= join->best_positions + join->const_tables;
   for (i= join->const_tables ; i < join->top_join_tab_count; )
@@ -4099,6 +4100,11 @@ int setup_semijoin_dups_elimination(JOIN *join, ulonglong options,
       {
         /* We jump from the last table to the first one */
         tab->loosescan_match_tab= tab + pos->n_sj_tables - 1;
+        
+        /* LooseScan requires records to be produced in order */
+        if (tab->select && tab->select->quick)
+          tab->select->quick->need_sorted_output();
+
         for (uint j= i; j < i + pos->n_sj_tables; j++)
           join->join_tab[j].inside_loosescan_range= TRUE;
 
@@ -4108,6 +4114,7 @@ int setup_semijoin_dups_elimination(JOIN *join, ulonglong options,
         for (uint kp=0; kp < pos->loosescan_picker.loosescan_parts; kp++)
           keylen += tab->table->key_info[keyno].key_part[kp].store_length;
 
+        tab->loosescan_key= keyno;
         tab->loosescan_key_len= keylen;
         if (pos->n_sj_tables > 1) 
           tab[pos->n_sj_tables - 1].do_firstmatch= tab;
@@ -4163,16 +4170,46 @@ int setup_semijoin_dups_elimination(JOIN *join, ulonglong options,
       }
       case SJ_OPT_FIRST_MATCH:
       {
-        JOIN_TAB *j, *jump_to= tab-1;
+        JOIN_TAB *j;
+        JOIN_TAB *jump_to= tab-1;
+
+        bool complex_range= FALSE;
+        table_map tables_in_range= table_map(0);
+
         for (j= tab; j != tab + pos->n_sj_tables; j++)
         {
-          /*
-            NOTE: this loop probably doesn't do the right thing for the case 
-            where FirstMatch's duplicate-generating range is interleaved with
-            "unrelated" tables (as specified in WL#3750, section 2.2).
-          */
+          tables_in_range |= j->table->map;
           if (!j->emb_sj_nest)
-            jump_to= tab;
+          {
+            /* 
+              Got a table that's not within any semi-join nest. This is a case
+              like this:
+
+              SELECT * FROM ot1, nt1 WHERE ot1.col IN (SELECT expr FROM it1, it2)
+
+              with a join order of 
+
+                   +----- FirstMatch range ----+
+                   |                           |
+              ot1 it1 nt1 nt2 it2 it3 ...
+                   |   ^
+                   |   +-------- 'j' points here
+                   +------------- SJ_OPT_FIRST_MATCH was set for this table as
+                                  it's the first one that produces duplicates
+              
+            */
+            DBUG_ASSERT(j != tab);  /* table ntX must have an itX before it */
+
+            /* 
+              If the table right before us is an inner table (like it1 in the
+              picture), it should be set to jump back to previous outer-table
+            */
+            if (j[-1].emb_sj_nest)
+              j[-1].do_firstmatch= jump_to;
+
+            jump_to= j; /* Jump back to us */
+            complex_range= TRUE;
+          }
           else
           {
             j->first_sj_inner_tab= tab;
@@ -4182,6 +4219,9 @@ int setup_semijoin_dups_elimination(JOIN *join, ulonglong options,
         j[-1].do_firstmatch= jump_to;
         i+= pos->n_sj_tables;
         pos+= pos->n_sj_tables;
+
+        if (complex_range)
+          join->complex_firstmatch_tables|= tables_in_range;
         break;
       }
       case SJ_OPT_NONE:
diff --git a/sql/opt_sum.cc b/sql/opt_sum.cc
index cda35895a3d..7087a85d13a 100644
--- a/sql/opt_sum.cc
+++ b/sql/opt_sum.cc
@@ -627,7 +627,12 @@ static bool matching_cond(bool max_fl, TABLE_REF *ref, KEY *keyinfo,
   if (!cond)
     DBUG_RETURN(TRUE);
   Field *field= field_part->field;
-  if (!(cond->used_tables() & field->table->map))
+  if (cond->used_tables() & OUTER_REF_TABLE_BIT)
+  { 
+    DBUG_RETURN(FALSE);
+  } 
+  if (!(cond->used_tables() & field->table->map) &&
+      test(cond->used_tables() & ~PSEUDO_TABLE_BITS))
   {
     /* Condition doesn't restrict the used table */
     DBUG_RETURN(!cond->const_item());
diff --git a/sql/slave.cc b/sql/slave.cc
index 98b75bc6dad..2b73cad1d7b 100644
--- a/sql/slave.cc
+++ b/sql/slave.cc
@@ -2927,9 +2927,8 @@ pthread_handler_t handle_slave_io(void *arg)
   if (init_slave_thread(thd, SLAVE_THD_IO))
   {
     mysql_cond_broadcast(&mi->start_cond);
-    mysql_mutex_unlock(&mi->run_lock);
     sql_print_error("Failed during slave I/O thread initialization");
-    goto err;
+    goto err_during_init;
   }
   mysql_mutex_lock(&LOCK_thread_count);
   threads.append(thd);
@@ -3232,6 +3231,7 @@ err:
   thd_proc_info(thd, "Waiting for slave mutex on exit");
   mysql_mutex_lock(&mi->run_lock);
 
+err_during_init:
   /* Forget the relay log's format */
   delete mi->rli.relay_log.description_event_for_queue;
   mi->rli.relay_log.description_event_for_queue= 0;
@@ -3357,10 +3357,9 @@ pthread_handler_t handle_slave_sql(void *arg)
       will be stuck if we fail here
     */
     mysql_cond_broadcast(&rli->start_cond);
-    mysql_mutex_unlock(&rli->run_lock);
     rli->report(ERROR_LEVEL, ER_SLAVE_FATAL_ERROR, 
                 "Failed during slave thread initialization");
-    goto err;
+    goto err_during_init;
   }
   thd->init_for_queries();
   thd->temporary_tables = rli->save_temporary_tables; // restore temp tables
@@ -3613,6 +3612,7 @@ the slave SQL thread with \"SLAVE START\". We stopped at log \
   thd->reset_db(NULL, 0);
   thd_proc_info(thd, "Waiting for slave mutex on exit");
   mysql_mutex_lock(&rli->run_lock);
+err_during_init:
   /* We need data_lock, at least to wake up any waiting master_pos_wait() */
   mysql_mutex_lock(&rli->data_lock);
   DBUG_ASSERT(rli->slave_running == 1); // tracking buffer overrun
diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index 92747066121..15c3999be54 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -8399,22 +8399,9 @@ static ulong parse_client_handshake_packet(MPVIO_EXT *mpvio,
   ulong client_capabilities= uint2korr(net->read_pos);
   if (client_capabilities & CLIENT_PROTOCOL_41)
   {
-    if (pkt_len < 32)
+    if (pkt_len < 4)
       return packet_error;
     client_capabilities|= ((ulong) uint2korr(net->read_pos+2)) << 16;
-    thd->max_client_packet_length= uint4korr(net->read_pos+4);
-    DBUG_PRINT("info", ("client_character_set: %d", (uint) net->read_pos[8]));
-    if (thd_init_client_charset(thd, (uint) net->read_pos[8]))
-      return packet_error;
-    thd->update_charset();
-    end= (char*) net->read_pos + 32;
-  }
-  else
-  {
-    if (pkt_len < 5)
-      return packet_error;
-    thd->max_client_packet_length= uint3korr(net->read_pos+2);
-    end= (char*) net->read_pos+5;
   }
 
   /* Disable those bits which are not supported by the client. */
@@ -8446,6 +8433,28 @@ static ulong parse_client_handshake_packet(MPVIO_EXT *mpvio,
     }
   }
 
+  if (client_capabilities & CLIENT_PROTOCOL_41)
+  {
+    if (pkt_len < 32)
+      return packet_error;
+    thd->max_client_packet_length= uint4korr(net->read_pos+4);
+    DBUG_PRINT("info", ("client_character_set: %d", (uint) net->read_pos[8]));
+    if (thd_init_client_charset(thd, (uint) net->read_pos[8]))
+      return packet_error;
+    thd->update_charset();
+    end= (char*) net->read_pos+32;
+  }
+  else
+  {
+    if (pkt_len < 5)
+      return packet_error;
+    thd->max_client_packet_length= uint3korr(net->read_pos+2);
+    end= (char*) net->read_pos+5;
+  }
+
+  if (end >= (char*) net->read_pos+ pkt_len +2)
+    return packet_error;
+
   if (thd->client_capabilities & CLIENT_IGNORE_SPACE)
     thd->variables.sql_mode|= MODE_IGNORE_SPACE;
   if (thd->client_capabilities & CLIENT_INTERACTIVE)
diff --git a/sql/sql_admin.cc b/sql/sql_admin.cc
index f01e279333d..5897d74582a 100644
--- a/sql/sql_admin.cc
+++ b/sql/sql_admin.cc
@@ -935,6 +935,11 @@ bool mysql_assign_to_keycache(THD* thd, TABLE_LIST* tables,
     DBUG_RETURN(TRUE);
   }
   mysql_mutex_unlock(&LOCK_global_system_variables);
+  if (!key_cache->key_cache_inited)
+  {
+    my_error(ER_UNKNOWN_KEY_CACHE, MYF(0), key_cache_name->str);
+    DBUG_RETURN(true);
+  }
   check_opt.key_cache= key_cache;
   DBUG_RETURN(mysql_admin_table(thd, tables, &check_opt,
 				"assign_to_keycache", TL_READ_NO_INSERT, 0, 0,
diff --git a/sql/sql_base.cc b/sql/sql_base.cc
index 1d215f5aa40..3167cb7363d 100644
--- a/sql/sql_base.cc
+++ b/sql/sql_base.cc
@@ -1923,14 +1923,15 @@ TABLE_LIST* find_dup_table(THD *thd, TABLE_LIST *table, TABLE_LIST *table_list,
   t_name= table->table_name;
   t_alias= table->alias;
 
+retry:
   DBUG_PRINT("info", ("real table: %s.%s", d_name, t_name));
-  for (;;)
+  for (TABLE_LIST *tl= table_list;;)
   {
     /*
       Table is unique if it is present only once in the global list
       of tables and once in the list of table locks.
     */
-    if (! (res= find_table_in_global_list(table_list, d_name, t_name)))
+    if (! (res= find_table_in_global_list(tl, d_name, t_name)))
       break;
 
     /* Skip if same underlying table. */
@@ -1961,10 +1962,23 @@ TABLE_LIST* find_dup_table(THD *thd, TABLE_LIST *table, TABLE_LIST *table_list,
       (exclude_from_table_unique_test) or prelocking placeholder.
     */
 next:
-    table_list= res->next_global;
+    tl= res->next_global;
     DBUG_PRINT("info",
                ("found same copy of table or table which we should skip"));
   }
+  if (res && res->belong_to_derived)
+  {
+    /* Try to fix */
+    TABLE_LIST *derived=  res->belong_to_derived;
+    if (derived->is_merged_derived())
+    {
+      DBUG_PRINT("info",
+                 ("convert merged to materialization to resolve the conflict"));
+      derived->change_refs_to_fields();
+      derived->set_materialized_derived();
+    }
+    goto retry;
+  }
   DBUG_RETURN(res);
 }
 
@@ -7363,11 +7377,16 @@ mark_common_columns(THD *thd, TABLE_LIST *table_ref_1, TABLE_LIST *table_ref_2,
       if (!(eq_cond= new Item_func_eq(item_ident_1, item_ident_2)))
         goto err;                               /* Out of memory. */
 
+      if (field_1 && field_1->vcol_info)
+        field_1->table->mark_virtual_col(field_1);
+      if (field_2 && field_2->vcol_info)
+        field_2->table->mark_virtual_col(field_2);
+
       /*
         Add the new equi-join condition to the ON clause. Notice that
         fix_fields() is applied to all ON conditions in setup_conds()
         so we don't do it here.
-       */
+      */
       add_join_on((table_ref_1->outer_join & JOIN_TYPE_RIGHT ?
                    table_ref_1 : table_ref_2),
                   eq_cond);
@@ -8085,7 +8104,8 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
     while ((table_list= ti++))
     {
       TABLE *table= table_list->table;
-      table->pos_in_table_list= table_list;
+      if (table)
+        table->pos_in_table_list= table_list;
       if (first_select_table &&
           table_list->top_table() == first_select_table)
       {
@@ -8098,7 +8118,7 @@ bool setup_tables(THD *thd, Name_resolution_context *context,
       {
         table_list->jtbm_table_no= tablenr;
       }
-      else
+      else if (table)
       {
         table->pos_in_table_list= table_list;
         setup_table_map(table, table_list, tablenr);
diff --git a/sql/sql_cache.cc b/sql/sql_cache.cc
index 0a1185a9924..9c86b2838c4 100644
--- a/sql/sql_cache.cc
+++ b/sql/sql_cache.cc
@@ -1463,10 +1463,10 @@ def_week_frmt: %lu, in_trans: %d, autocommit: %d",
       In case the wait time can't be determined there is an upper limit which
       causes try_lock() to abort with a time out.
 
-      The 'TRUE' parameter indicate that the lock is allowed to timeout
+      The 'TIMEOUT' parameter indicate that the lock is allowed to timeout
 
     */
-    if (try_lock(thd, Query_cache::WAIT))
+    if (try_lock(thd, Query_cache::TIMEOUT))
       DBUG_VOID_RETURN;
     if (query_cache_size == 0)
     {
@@ -1674,6 +1674,17 @@ Query_cache::send_result_to_client(THD *thd, char *org_sql, uint query_length)
   if (is_disabled() || thd->locked_tables_mode ||
       thd->variables.query_cache_type == 0)
     goto err;
+
+  /*
+    The following can only happen for prepared statements that was found
+    during parsing or later that the query was not cacheable.
+  */
+  if (!thd->lex->safe_to_cache_query)
+  {
+    DBUG_PRINT("qcache", ("SELECT is non-cacheable"));
+    goto err;
+  }
+
   DBUG_ASSERT(query_cache_size != 0);           // otherwise cache would be disabled
 
   thd->query_cache_is_applicable= 1;
@@ -1959,6 +1970,7 @@ def_week_frmt: %lu, in_trans: %d, autocommit: %d",
           faster.
         */
         thd->query_cache_is_applicable= 0;      // Query can't be cached
+        thd->lex->safe_to_cache_query= 0;       // For prepared statements
         BLOCK_UNLOCK_RD(query_block);
         DBUG_RETURN(-1);
       }
@@ -1975,6 +1987,7 @@ def_week_frmt: %lu, in_trans: %d, autocommit: %d",
 		  table_list.db, table_list.alias));
       unlock();
       thd->query_cache_is_applicable= 0;        // Query can't be cached
+      thd->lex->safe_to_cache_query= 0;         // For prepared statements
       BLOCK_UNLOCK_RD(query_block);
       DBUG_RETURN(-1);				// Privilege error
     }
@@ -1984,6 +1997,7 @@ def_week_frmt: %lu, in_trans: %d, autocommit: %d",
 			    table_list.db, table_list.alias));
       BLOCK_UNLOCK_RD(query_block);
       thd->query_cache_is_applicable= 0;        // Query can't be cached
+      thd->lex->safe_to_cache_query= 0;         // For prepared statements
       goto err_unlock;				// Parse query
     }
 #endif /*!NO_EMBEDDED_ACCESS_CHECKS*/
@@ -2007,7 +2021,13 @@ def_week_frmt: %lu, in_trans: %d, autocommit: %d",
                                   table->key_length());
       }
       else
+      {
+        /*
+          As this can change from call to call, don't reset set
+          thd->lex->safe_to_cache_query
+        */
         thd->query_cache_is_applicable= 0;      // Query can't be cached
+      }
       /* End the statement transaction potentially started by engine. */
       trans_rollback_stmt(thd);
       goto err_unlock;				// Parse query
@@ -3901,6 +3921,7 @@ Query_cache::process_and_count_tables(THD *thd, TABLE_LIST *tables_used,
       DBUG_PRINT("qcache", ("Don't cache statement as it refers to "
                             "tables with column privileges."));
       thd->query_cache_is_applicable= 0;        // Query can't be cached
+      thd->lex->safe_to_cache_query= 0;         // For prepared statements
       DBUG_RETURN(0);
     }
 #endif
@@ -4037,6 +4058,10 @@ my_bool Query_cache::ask_handler_allowance(THD *thd,
     {
       DBUG_PRINT("qcache", ("Handler does not allow caching for %s.%s",
 			    tables_used->db, tables_used->alias));
+      /*
+        As this can change from call to call, don't reset set
+        thd->lex->safe_to_cache_query
+      */
       thd->query_cache_is_applicable= 0;        // Query can't be cached
       DBUG_RETURN(1);
     }
diff --git a/sql/sql_cache.h b/sql/sql_cache.h
index 9d713d012f5..134fd055110 100644
--- a/sql/sql_cache.h
+++ b/sql/sql_cache.h
@@ -443,8 +443,8 @@ protected:
 	      uint def_query_hash_size = QUERY_CACHE_DEF_QUERY_HASH_SIZE,
 	      uint def_table_hash_size = QUERY_CACHE_DEF_TABLE_HASH_SIZE);
 
-  bool is_disabled(void) { return m_cache_status != OK; }
-  bool is_disable_in_progress(void)
+  inline bool is_disabled(void) { return m_cache_status != OK; }
+  inline bool is_disable_in_progress(void)
   { return m_cache_status == DISABLE_REQUEST; }
 
   /* initialize cache (mutex) */
diff --git a/sql/sql_class.h b/sql/sql_class.h
index ce000adc785..563a9adefce 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -585,12 +585,15 @@ typedef struct system_status_var
   ulong ha_read_prev_count;
   ulong ha_read_rnd_count;
   ulong ha_read_rnd_next_count;
+  ulong ha_read_rnd_deleted_count;
   /*
     This number doesn't include calls to the default implementation and
     calls made by range access. The intent is to count only calls made by
     BatchedKeyAccess.
   */
   ulong ha_multi_range_read_init_count;
+  ulong ha_mrr_extra_key_sorts;
+  ulong ha_mrr_extra_rowid_sorts;
 
   ulong ha_rollback_count;
   ulong ha_update_count;
@@ -4221,10 +4224,17 @@ inline int handler::ha_ft_read(uchar *buf)
 inline int handler::ha_rnd_next(uchar *buf)
 {
   MYSQL_READ_ROW_START(table_share->db.str, table_share->table_name.str, TRUE);
-  increment_statistics(&SSV::ha_read_rnd_next_count);
   int error= rnd_next(buf);
   if (!error)
+  {
     update_rows_read();
+    increment_statistics(&SSV::ha_read_rnd_next_count);
+  }
+  else if (error == HA_ERR_RECORD_DELETED)
+    increment_statistics(&SSV::ha_read_rnd_deleted_count);
+  else
+    increment_statistics(&SSV::ha_read_rnd_next_count);
+
   table->status=error ? STATUS_NOT_FOUND: 0;
   MYSQL_READ_ROW_DONE(error);
   return error;
diff --git a/sql/sql_delete.cc b/sql/sql_delete.cc
index f48724236d4..ff88bf7c0f8 100644
--- a/sql/sql_delete.cc
+++ b/sql/sql_delete.cc
@@ -76,7 +76,7 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
   if (mysql_handle_list_of_derived(thd->lex, table_list, DT_PREPARE))
     DBUG_RETURN(TRUE);
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
      my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE");
      DBUG_RETURN(TRUE);
@@ -476,7 +476,8 @@ int mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds)
       setup_conds(thd, table_list, select_lex->leaf_tables, conds) ||
       setup_ftfuncs(select_lex))
     DBUG_RETURN(TRUE);
-  if (!table_list->updatable || check_key_in_view(thd, table_list))
+  if (!table_list->single_table_updatable() ||
+      check_key_in_view(thd, table_list))
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE");
     DBUG_RETURN(TRUE);
@@ -572,7 +573,7 @@ int mysql_multi_delete_prepare(THD *thd)
        DBUG_RETURN(TRUE);
     }
 
-    if (!target_tbl->correspondent_table->updatable ||
+    if (!target_tbl->correspondent_table->single_table_updatable() ||
         check_key_in_view(thd, target_tbl->correspondent_table))
     {
       my_error(ER_NON_UPDATABLE_TABLE, MYF(0),
diff --git a/sql/sql_derived.cc b/sql/sql_derived.cc
index 13985becff7..9f06c99c472 100644
--- a/sql/sql_derived.cc
+++ b/sql/sql_derived.cc
@@ -483,7 +483,7 @@ bool mysql_derived_merge_for_insert(THD *thd, LEX *lex, TABLE_LIST *derived)
     return mysql_derived_prepare(thd, lex, derived);
   if (!derived->is_multitable())
   {
-    if (!derived->updatable)
+    if (!derived->single_table_updatable())
       return derived->create_field_translation(thd);
     if (derived->merge_underlying_list)
     {
@@ -750,7 +750,7 @@ bool mysql_derived_optimize(THD *thd, LEX *lex, TABLE_LIST *derived)
     if (!derived->is_merged_derived())
     {
       JOIN *join= first_select->join;
-      unit->set_limit(first_select);
+      unit->set_limit(unit->global_parameters);
       unit->optimized= TRUE;
       if ((res= join->optimize()))
         goto err;
@@ -865,7 +865,7 @@ bool mysql_derived_fill(THD *thd, LEX *lex, TABLE_LIST *derived)
   }
   else
   {
-    unit->set_limit(first_select);
+    unit->set_limit(unit->global_parameters);
     if (unit->select_limit_cnt == HA_POS_ERROR)
       first_select->options&= ~OPTION_FOUND_ROWS;
 
diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc
index c7423d9bada..2209a62d7ed 100644
--- a/sql/sql_insert.cc
+++ b/sql/sql_insert.cc
@@ -118,7 +118,8 @@ static bool check_view_insertability(THD *thd, TABLE_LIST *view);
 */
 
 bool check_view_single_update(List<Item> &fields, List<Item> *values,
-                              TABLE_LIST *view, table_map *map)
+                              TABLE_LIST *view, table_map *map,
+                              bool insert)
 {
   /* it is join view => we need to find the table for update */
   List_iterator_fast<Item> it(fields);
@@ -156,6 +157,14 @@ bool check_view_single_update(List<Item> &fields, List<Item> *values,
   */
   tbl->table->insert_values= view->table->insert_values;
   view->table= tbl->table;
+  if (!tbl->single_table_updatable())
+  {
+    if (insert)
+      my_error(ER_NON_INSERTABLE_TABLE, MYF(0), view->alias, "INSERT");
+    else
+      my_error(ER_NON_UPDATABLE_TABLE, MYF(0), view->alias, "UPDATE");
+    return TRUE;
+  }
   *map= tables;
 
   return FALSE;
@@ -200,7 +209,7 @@ static int check_insert_fields(THD *thd, TABLE_LIST *table_list,
 {
   TABLE *table= table_list->table;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_INSERTABLE_TABLE, MYF(0), table_list->alias, "INSERT");
     return -1;
@@ -276,7 +285,7 @@ static int check_insert_fields(THD *thd, TABLE_LIST *table_list,
       if (check_view_single_update(fields,
                                    fields_and_values_from_different_maps ?
                                    (List<Item>*) 0 : &values,
-                                   table_list, map))
+                                   table_list, map, true))
         return -1;
       table= table_list->table;
     }
@@ -363,7 +372,7 @@ static int check_update_fields(THD *thd, TABLE_LIST *insert_table_list,
   if (insert_table_list->is_view() &&
       insert_table_list->is_merged_derived() &&
       check_view_single_update(update_fields, &update_values,
-                               insert_table_list, map))
+                               insert_table_list, map, false))
     return -1;
 
   if (table->timestamp_field)
@@ -1255,7 +1264,7 @@ static bool mysql_prepare_insert_check_table(THD *thd, TABLE_LIST *table_list,
   bool insert_into_view= (table_list->view != 0);
   DBUG_ENTER("mysql_prepare_insert_check_table");
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_INSERTABLE_TABLE, MYF(0), table_list->alias, "INSERT");
     DBUG_RETURN(TRUE);
diff --git a/sql/sql_join_cache.cc b/sql/sql_join_cache.cc
index 3600bbbb65f..f0362585e39 100644
--- a/sql/sql_join_cache.cc
+++ b/sql/sql_join_cache.cc
@@ -899,6 +899,8 @@ int JOIN_CACHE::alloc_buffer()
       curr_buff_space_sz+= cache->get_join_buffer_size();
     }
   }
+  curr_min_buff_space_sz+= min_buff_size;
+  curr_buff_space_sz+= buff_size;
 
   if (curr_min_buff_space_sz > join_buff_space_limit ||
       (curr_buff_space_sz > join_buff_space_limit &&
@@ -2110,16 +2112,6 @@ enum_nested_loop_state JOIN_CACHE::join_records(bool skip_last)
     if (rc != NESTED_LOOP_OK && rc != NESTED_LOOP_NO_MORE_ROWS)
       goto finish;
   }
-  if (outer_join_first_inner)
-  {
-    /* 
-      All null complemented rows have been already generated for all
-      outer records from join buffer. Restore the state of the
-      first_unmatched values to 0 to avoid another null complementing.
-    */
-    for (tab= join_tab->first_inner; tab <= join_tab->last_inner; tab++)
-      tab->first_unmatched= 0;
-  } 
  
   if (skip_last)
   {
@@ -2132,6 +2124,16 @@ enum_nested_loop_state JOIN_CACHE::join_records(bool skip_last)
   }
 
 finish:
+  if (outer_join_first_inner)
+  {
+    /* 
+      All null complemented rows have been already generated for all
+      outer records from join buffer. Restore the state of the
+      first_unmatched values to 0 to avoid another null complementing.
+    */
+    for (tab= join_tab->first_inner; tab <= join_tab->last_inner; tab++)
+      tab->first_unmatched= 0;
+  } 
   restore_last_record();
   reset(TRUE);
   DBUG_PRINT("exit", ("rc: %d", rc));
diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc
index 04de1325480..56e05c3dcad 100644
--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -2847,7 +2847,7 @@ void st_select_lex_unit::set_limit(st_select_lex *sl)
 
       DBUG_ASSERT(fix_fields_successful);
     }
-    val= fix_fields_successful ? item->val_uint() : HA_POS_ERROR;
+    val= fix_fields_successful ? item->val_uint() : 0;
   }
   else
     val= ULL(0);
@@ -3167,6 +3167,7 @@ void LEX::cleanup_after_one_table_open()
   if (all_selects_list != &select_lex)
   {
     derived_tables= 0;
+    select_lex.exclude_from_table_unique_test= false;
     /* cleunup underlying units (units of VIEW) */
     for (SELECT_LEX_UNIT *un= select_lex.first_inner_unit();
          un;
diff --git a/sql/sql_load.cc b/sql/sql_load.cc
index aab9ea76499..33d1741b5ec 100644
--- a/sql/sql_load.cc
+++ b/sql/sql_load.cc
@@ -235,7 +235,7 @@ int mysql_load(THD *thd,sql_exchange *ex,TABLE_LIST *table_list,
                                     INSERT_ACL | UPDATE_ACL, FALSE))
      DBUG_RETURN(-1);
   if (!table_list->table ||               // do not suport join view
-      !table_list->updatable ||           // and derived tables
+      !table_list->single_table_updatable() || // and derived tables
       check_key_in_view(thd, table_list))
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "LOAD");
diff --git a/sql/sql_manager.cc b/sql/sql_manager.cc
index 221ba56130a..e9ac55730d3 100644
--- a/sql/sql_manager.cc
+++ b/sql/sql_manager.cc
@@ -43,6 +43,7 @@ static struct handler_cb * volatile cb_list;
 bool mysql_manager_submit(void (*action)())
 {
   bool result= FALSE;
+  DBUG_ASSERT(manager_thread_in_use);
   struct handler_cb * volatile *cb;
   mysql_mutex_lock(&LOCK_manager);
   cb= &cb_list;
@@ -74,8 +75,9 @@ pthread_handler_t handle_manager(void *arg __attribute__((unused)))
 
   pthread_detach_this_thread();
   manager_thread = pthread_self();
+  mysql_cond_init(key_COND_manager, &COND_manager,NULL);
+  mysql_mutex_init(key_LOCK_manager, &LOCK_manager, NULL);
   manager_thread_in_use = 1;
-
   for (;;)
   {
     mysql_mutex_lock(&LOCK_manager);
@@ -122,6 +124,8 @@ pthread_handler_t handle_manager(void *arg __attribute__((unused)))
     }
   }
   manager_thread_in_use = 0;
+  mysql_mutex_destroy(&LOCK_manager);
+  mysql_cond_destroy(&COND_manager);
   DBUG_LEAVE; // Can't use DBUG_RETURN after my_thread_end
   my_thread_end();
   return (NULL);
@@ -149,14 +153,14 @@ void stop_handle_manager()
 {
   DBUG_ENTER("stop_handle_manager");
   abort_manager = true;
-  mysql_mutex_lock(&LOCK_manager);
   if (manager_thread_in_use)
   {
+    mysql_mutex_lock(&LOCK_manager);
     DBUG_PRINT("quit", ("initiate shutdown of handle manager thread: 0x%lx",
                         (ulong)manager_thread));
     mysql_cond_signal(&COND_manager);
+    mysql_mutex_unlock(&LOCK_manager);
   }
-  mysql_mutex_unlock(&LOCK_manager);
   DBUG_VOID_RETURN;
 }
 
diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index c0792b2c342..101b0b52c30 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -6676,13 +6676,23 @@ static uint kill_threads_for_user(THD *thd, LEX_USER *user,
   if (!threads_to_kill.is_empty())
   {
     List_iterator_fast<THD> it(threads_to_kill);
-    THD *ptr;
-    while ((ptr= it++))
+    THD *next_ptr;
+    THD *ptr= it++;
+    do
     {
       ptr->awake(kill_signal);
+      /*
+        Careful here: The list nodes are allocated on the memroots of the
+        THDs to be awakened.
+        But those THDs may be terminated and deleted as soon as we release
+        LOCK_thd_data, which will make the list nodes invalid.
+        Since the operation "it++" dereferences the "next" pointer of the
+        previous list node, we need to do this while holding LOCK_thd_data.
+      */
+      next_ptr= it++;
       mysql_mutex_unlock(&ptr->LOCK_thd_data);
       (*rows)++;
-    }
+    } while ((ptr= next_ptr));
   }
   DBUG_RETURN(0);
 }
diff --git a/sql/sql_prepare.cc b/sql/sql_prepare.cc
index f5a2f409dfc..da9dcc053cf 100644
--- a/sql/sql_prepare.cc
+++ b/sql/sql_prepare.cc
@@ -1365,7 +1365,7 @@ static int mysql_test_update(Prepared_statement *stmt,
   if (table_list->handle_derived(thd->lex, DT_PREPARE))
     goto error;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "UPDATE");
     goto error;
@@ -1439,7 +1439,7 @@ static bool mysql_test_delete(Prepared_statement *stmt,
   if (mysql_handle_derived(thd->lex, DT_PREPARE))
     goto error;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "DELETE");
     goto error;
diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index f22510bb2b7..5e483c2d359 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -131,7 +131,8 @@ static COND *build_equal_items(THD *thd, COND *cond,
                                COND_EQUAL *inherited,
                                List<TABLE_LIST> *join_list,
                                COND_EQUAL **cond_equal_ref);
-static COND* substitute_for_best_equal_field(COND *cond,
+static COND* substitute_for_best_equal_field(JOIN_TAB *context_tab,
+                                             COND *cond,
                                              COND_EQUAL *cond_equal,
                                              void *table_join_idx);
 static COND *simplify_joins(JOIN *join, List<TABLE_LIST> *join_list,
@@ -1254,7 +1255,8 @@ JOIN::optimize()
   */
   if (conds)
   {
-    conds= substitute_for_best_equal_field(conds, cond_equal, map2table);
+    conds= substitute_for_best_equal_field(NO_PARTICULAR_TAB, conds, 
+                                           cond_equal, map2table);
     conds->update_used_tables();
     DBUG_EXECUTE("where",
                  print_where(conds,
@@ -1271,7 +1273,8 @@ JOIN::optimize()
   {
     if (*tab->on_expr_ref)
     {
-      *tab->on_expr_ref= substitute_for_best_equal_field(*tab->on_expr_ref,
+      *tab->on_expr_ref= substitute_for_best_equal_field(NO_PARTICULAR_TAB,
+                                                         *tab->on_expr_ref,
                                                          tab->cond_equal,
                                                          map2table);
       (*tab->on_expr_ref)->update_used_tables();
@@ -1294,7 +1297,7 @@ JOIN::optimize()
         continue;
       COND_EQUAL *equals= tab->first_inner ? tab->first_inner->cond_equal : 
                                              cond_equal;
-      ref_item= substitute_for_best_equal_field(ref_item, equals, map2table);
+      ref_item= substitute_for_best_equal_field(tab, ref_item, equals, map2table);
       ref_item->update_used_tables();
       if (*ref_item_ptr != ref_item)
       {
@@ -3596,6 +3599,7 @@ make_join_statistics(JOIN *join, List<TABLE_LIST> &tables_list,
       for (i= 0; i < join->table_count ; i++)
         records*= join->best_positions[i].records_read ?
                   (ha_rows)join->best_positions[i].records_read : 1;
+      set_if_smaller(records, unit->select_limit_cnt);
       join->select_lex->increase_derived_records(records);
     }
   }
@@ -8997,7 +9001,7 @@ void revise_cache_usage(JOIN_TAB *join_tab)
          first_inner;
          first_inner= first_inner->first_upper)           
     {
-      for (tab= end_tab-1; tab >= first_inner; tab--)
+      for (tab= end_tab; tab >= first_inner; tab--)
         set_join_cache_denial(tab);
       end_tab= first_inner;
     }
@@ -9005,7 +9009,7 @@ void revise_cache_usage(JOIN_TAB *join_tab)
   else if (join_tab->first_sj_inner_tab)
   {
     first_inner= join_tab->first_sj_inner_tab;
-    for (tab= join_tab-1; tab >= first_inner; tab--)
+    for (tab= join_tab; tab >= first_inner; tab--)
     {
       set_join_cache_denial(tab);
     }
@@ -9247,6 +9251,9 @@ uint check_join_cache_usage(JOIN_TAB *tab,
 
   if (tab->use_quick == 2)
     goto no_join_cache;
+
+  if (tab->table->map & join->complex_firstmatch_tables)
+    goto no_join_cache;
   
   /*
     Don't use join cache if we're inside a join tab range covered by LooseScan
@@ -9457,7 +9464,7 @@ void check_join_cache_usage_for_tables(JOIN *join, ulonglong options,
   {
     tab->used_join_cache_level= join->max_allowed_join_cache_level;  
   }
-  
+
   uint idx= join->const_tables;
   for (tab= first_linear_tab(join, WITHOUT_CONST_TABLES); 
        tab; 
@@ -9542,6 +9549,8 @@ make_join_readinfo(JOIN *join, ulonglong options, uint no_jbuf_after)
   bool statistics= test(!(join->select_options & SELECT_DESCRIBE));
   bool sorted= 1;
 
+  join->complex_firstmatch_tables= table_map(0);
+
   if (!join->select_lex->sj_nests.is_empty() &&
       setup_semijoin_dups_elimination(join, options, no_jbuf_after))
     DBUG_RETURN(TRUE); /* purecov: inspected */
@@ -10422,6 +10431,15 @@ remove_const(JOIN *join,ORDER *first_order, COND *cond,
   }
   
 
+  /*
+    Cleanup to avoid interference of calls of this function for
+    ORDER BY and GROUP BY
+  */
+  for (JOIN_TAB *tab= join->join_tab + join->const_tables;
+       tab < join->join_tab + join->table_count;
+       tab++)
+    tab->cached_eq_ref_table= FALSE;
+
   prev_ptr= &first_order;
   *simple_order= *join->join_tab[join->const_tables].on_expr_ref ? 0 : 1;
 
@@ -11582,7 +11600,7 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels,
   else
   {
     TABLE_LIST *emb_nest;
-    head= item_equal->get_first(NULL);
+    head= item_equal->get_first(NO_PARTICULAR_TAB, NULL);
     it++;
     if ((emb_nest= embedding_sjm(head)))
     {
@@ -11609,7 +11627,7 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels,
     }      
 
     /* 
-      Check if "item_field=head" equality is already guaranteed to be true 
+      Check if "field_item=head" equality is already guaranteed to be true 
       on upper AND-levels.
     */
     if (upper)
@@ -11621,7 +11639,8 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels,
         Item_equal_fields_iterator li(*item_equal);
         while ((item= li++) != field_item)
         {
-          if (item->find_item_equal(upper_levels) == upper)
+          if (embedding_sjm(item) == field_sjm && 
+              item->find_item_equal(upper_levels) == upper)
             break;
         }
       }
@@ -11691,6 +11710,7 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels,
   return cond;
 }
 
+
 /**
   Substitute every field reference in a condition by the best equal field
   and eliminate all multiple equality predicates.
@@ -11705,6 +11725,9 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels,
     After this the function retrieves all other conjuncted
     predicates substitute every field reference by the field reference
     to the first equal field or equal constant if there are any.
+
+  @param context_tab     Join tab that 'cond' will be attached to, or 
+                         NO_PARTICULAR_TAB. See notes above.
   @param cond            condition to process
   @param cond_equal      multiple equalities to take into consideration
   @param table_join_idx  index to tables determining field preference
@@ -11715,11 +11738,37 @@ Item *eliminate_item_equal(COND *cond, COND_EQUAL *upper_levels,
     new fields in multiple equality item of lower levels. We want
     the order in them to comply with the order of upper levels.
 
+    context_tab may be used to specify which join tab `cond` will be
+    attached to. There are two possible cases:
+
+    1. context_tab != NO_PARTICULAR_TAB
+       We're doing substitution for an Item which will be evaluated in the 
+       context of a particular item. For example, if the optimizer does a 
+       ref access on "tbl1.key= expr" then
+        = equality substitution will be perfomed on 'expr'
+        = it is known in advance that 'expr' will be evaluated when 
+          table t1 is accessed.
+       Note that in this kind of substution we never have to replace Item_equal
+       objects. For example, for
+
+        t.key= func(col1=col2 AND col2=const)
+       
+       we will not build Item_equal or do equality substution (if we decide to,
+       this function will need to be fixed to handle it)
+
+    2. context_tab == NO_PARTICULAR_TAB
+       We're doing substitution in WHERE/ON condition, which is not yet 
+       attached to any particular join_tab. We will use information about the
+       chosen join order to make "optimal" substitions, i.e. those that allow
+       to apply filtering as soon as possible. See eliminate_item_equal() and 
+       Item_equal::get_first() for details.
+
   @return
     The transformed condition
 */
 
-static COND* substitute_for_best_equal_field(COND *cond,
+static COND* substitute_for_best_equal_field(JOIN_TAB *context_tab,
+                                             COND *cond,
                                              COND_EQUAL *cond_equal,
                                              void *table_join_idx)
 {
@@ -11735,7 +11784,7 @@ static COND* substitute_for_best_equal_field(COND *cond,
     if (and_level)
     {
       cond_equal= &((Item_cond_and *) cond)->cond_equal;
-      cond_list->disjoin((List<Item> *) &cond_equal->current_level);
+      cond_list->disjoin((List<Item> *) &cond_equal->current_level);/* remove Item_equal objects from the AND. */
 
       List_iterator_fast<Item_equal> it(cond_equal->current_level);      
       while ((item_equal= it++))
@@ -11748,7 +11797,8 @@ static COND* substitute_for_best_equal_field(COND *cond,
     Item *item;
     while ((item= li++))
     {
-      Item *new_item= substitute_for_best_equal_field(item, cond_equal,
+      Item *new_item= substitute_for_best_equal_field(context_tab,
+                                                      item, cond_equal,
                                                       table_join_idx);
       /*
         This works OK with PS/SP re-execution as changes are made to
@@ -11795,7 +11845,8 @@ static COND* substitute_for_best_equal_field(COND *cond,
       List_iterator_fast<Item_equal> it(cond_equal->current_level);
       while((item_equal= it++))
       {
-        cond= cond->transform(&Item::replace_equal_field, (uchar *) item_equal);
+        REPLACE_EQUAL_FIELD_ARG arg= {item_equal, context_tab};
+        cond= cond->transform(&Item::replace_equal_field, (uchar *) &arg);
       }
       cond_equal= cond_equal->upper_levels;
     }
@@ -15589,7 +15640,7 @@ sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records)
     if (join_tab->loosescan_match_tab && 
         join_tab->loosescan_match_tab->found_match)
     {
-      KEY *key= join_tab->table->key_info + join_tab->index;
+      KEY *key= join_tab->table->key_info + join_tab->loosescan_key;
       key_copy(join_tab->loosescan_buf, join_tab->table->record[0], key, 
                join_tab->loosescan_key_len);
       skip_over= TRUE;
@@ -15599,7 +15650,7 @@ sub_select(JOIN *join,JOIN_TAB *join_tab,bool end_of_records)
 
     if (skip_over && !error) 
     {
-      if(!key_cmp(join_tab->table->key_info[join_tab->index].key_part,
+      if(!key_cmp(join_tab->table->key_info[join_tab->loosescan_key].key_part,
                   join_tab->loosescan_buf, join_tab->loosescan_key_len))
       {
         /* 
@@ -18395,7 +18446,6 @@ create_sort_index(THD *thd, JOIN *join, ORDER *order,
     table->sort.io_cache= NULL;
 
     select->cleanup();				// filesort did select
-    tab->select= 0;
     table->quick_keys.clear_all();  // as far as we cleanup select->quick
     table->intersect_keys.clear_all();
     table->sort.io_cache= tablesort_result_cache;
diff --git a/sql/sql_select.h b/sql/sql_select.h
index 46e7b7fe95f..2f7d31de404 100644
--- a/sql/sql_select.h
+++ b/sql/sql_select.h
@@ -374,6 +374,12 @@ typedef struct st_join_table {
   /* Buffer to save index tuple to be able to skip duplicates */
   uchar *loosescan_buf;
   
+  /* 
+    Index used by LooseScan (we store it here separately because ref access
+    stores it in tab->ref.key, while range scan stores it in tab->index, etc)
+  */
+  uint loosescan_key;
+
   /* Length of key tuple (depends on #keyparts used) to store in the above */
   uint loosescan_key_len;
 
@@ -986,6 +992,13 @@ public:
   
   /* We also maintain a stack of join optimization states in * join->positions[] */
 /******* Join optimization state members end *******/
+
+  /*
+    Tables within complex firstmatch ranges (i.e. those where inner tables are
+    interleaved with outer tables). Join buffering cannot be used for these.
+  */
+  table_map complex_firstmatch_tables;
+
   /*
     The cost of best complete join plan found so far during optimization,
     after optimization phase - cost of picked join order (not taking into
@@ -1440,6 +1453,7 @@ public:
   virtual ~store_key() {}			/** Not actually needed */
   virtual enum Type type() const=0;
   virtual const char *name() const=0;
+  virtual bool store_key_is_const() { return false; }
 
   /**
     @brief sets ignore truncation warnings mode and calls the real copy method
@@ -1593,6 +1607,7 @@ public:
 
   enum Type type() const { return CONST_ITEM_STORE_KEY; }
   const char *name() const { return "const"; }
+  bool store_key_is_const() { return true; }
 
 protected:  
   enum store_key_result copy_inner()
diff --git a/sql/sql_union.cc b/sql/sql_union.cc
index 584ebd904a8..9b6d3a8dda5 100644
--- a/sql/sql_union.cc
+++ b/sql/sql_union.cc
@@ -964,6 +964,7 @@ bool st_select_lex::cleanup()
   }
   non_agg_fields.empty();
   inner_refs_list.empty();
+  exclude_from_table_unique_test= FALSE;
   DBUG_RETURN(error);
 }
 
diff --git a/sql/sql_update.cc b/sql/sql_update.cc
index 99cac9f40e7..5fa30c91417 100644
--- a/sql/sql_update.cc
+++ b/sql/sql_update.cc
@@ -304,7 +304,7 @@ int mysql_update(THD *thd,
   thd_proc_info(thd, "init");
   table= table_list->table;
 
-  if (!table_list->updatable)
+  if (!table_list->single_table_updatable())
   {
     my_error(ER_NON_UPDATABLE_TABLE, MYF(0), table_list->alias, "UPDATE");
     DBUG_RETURN(1);
@@ -1246,7 +1246,7 @@ int mysql_multi_update_prepare(THD *thd)
     /* if table will be updated then check that it is unique */
     if (table->map & tables_for_update)
     {
-      if (!tl->updatable || check_key_in_view(thd, tl))
+      if (!tl->single_table_updatable() || check_key_in_view(thd, tl))
       {
         my_error(ER_NON_UPDATABLE_TABLE, MYF(0), tl->alias, "UPDATE");
         DBUG_RETURN(TRUE);
diff --git a/sql/table.cc b/sql/table.cc
index 53e5872bfe4..8f4f034bf2a 100644
--- a/sql/table.cc
+++ b/sql/table.cc
@@ -4053,6 +4053,28 @@ bool TABLE_LIST::prep_where(THD *thd, Item **conds,
   DBUG_RETURN(FALSE);
 }
 
+/**
+  Check that table/view is updatable and if it has single
+  underlying tables/views it is also updatable
+
+  @return Result of the check.
+*/
+
+bool TABLE_LIST::single_table_updatable()
+{
+  if (!updatable)
+    return false;
+  if (view_tables && view_tables->elements == 1)
+  {
+    /*
+      We need to check deeply only single table views. Multi-table views
+      will be turned to multi-table updates and then checked by leaf tables
+    */
+    return view_tables->head()->single_table_updatable();
+  }
+  return true;
+}
+
 
 /*
   Merge ON expressions for a view
@@ -4702,6 +4724,36 @@ bool TABLE_LIST::prepare_security(THD *thd)
   DBUG_RETURN(FALSE);
 }
 
+#ifndef DBUG_OFF
+void TABLE_LIST::set_check_merged()
+{
+  DBUG_ASSERT(derived);
+  /*
+    It is not simple to check all, but at least this should be checked:
+    this select is not excluded or the exclusion came from above.
+  */
+  DBUG_ASSERT(!derived->first_select()->exclude_from_table_unique_test ||
+              derived->outer_select()->
+              exclude_from_table_unique_test);
+}
+#endif
+
+void TABLE_LIST::set_check_materialized()
+{
+  DBUG_ASSERT(derived);
+  if (!derived->first_select()->exclude_from_table_unique_test)
+    derived->set_unique_exclude();
+  else
+  {
+    /*
+      The subtree should be already excluded
+    */
+    DBUG_ASSERT(!derived->first_select()->first_inner_unit() ||
+                derived->first_select()->first_inner_unit()->first_select()->
+                exclude_from_table_unique_test);
+  }
+}
+
 
 Natural_join_column::Natural_join_column(Field_translator *field_param,
                                          TABLE_LIST *tab)
@@ -4828,6 +4880,7 @@ Item *Field_iterator_table::create_item(THD *thd)
   {
     select->non_agg_fields.push_back(item);
     item->marker= select->cur_pos_in_select_list;
+    select->set_non_agg_field_used(true);
   }
   return item;
 }
@@ -5532,6 +5585,12 @@ void TABLE::mark_virtual_columns_for_write(bool insert_fl)
   Field **vfield_ptr, *tmp_vfield;
   bool bitmap_updated= FALSE;
 
+  if (!vfield)
+    return;
+
+  if (!vfield)
+    return;
+
   for (vfield_ptr= vfield; *vfield_ptr; vfield_ptr++)
   {
     tmp_vfield= *vfield_ptr;
@@ -6293,8 +6352,9 @@ bool TABLE_LIST::init_derived(THD *thd, bool init_view)
   */
   if (is_materialized_derived())
   {
-    unit->master_unit()->set_unique_exclude();
+    set_check_materialized();
   }
+
   /*
     Create field translation for mergeable derived tables/views.
     For derived tables field translation can be created only after
diff --git a/sql/table.h b/sql/table.h
index a327d625387..77a7f8cf6a9 100644
--- a/sql/table.h
+++ b/sql/table.h
@@ -1983,16 +1983,18 @@ struct TABLE_LIST
   inline void set_merged_derived()
   {
     derived_type= ((derived_type & DTYPE_MASK) |
-                    DTYPE_TABLE | DTYPE_MERGE);
+                   DTYPE_TABLE | DTYPE_MERGE);
+    set_check_merged();
   }
   inline bool is_materialized_derived()
   {
     return (derived_type & DTYPE_MATERIALIZE);
   }
-  inline void set_materialized_derived()
+  void set_materialized_derived()
   {
     derived_type= ((derived_type & DTYPE_MASK) |
-                    DTYPE_TABLE | DTYPE_MATERIALIZE);
+                   DTYPE_TABLE | DTYPE_MATERIALIZE);
+    set_check_materialized();
   }
   inline bool is_multitable()
   {
@@ -2033,9 +2035,17 @@ struct TABLE_LIST
   int fetch_number_of_rows();
   bool change_refs_to_fields();
 
+  bool single_table_updatable();
+
 private:
   bool prep_check_option(THD *thd, uint8 check_opt_type);
   bool prep_where(THD *thd, Item **conds, bool no_where_clause);
+  void set_check_materialized();
+#ifndef DBUG_OFF
+  void set_check_merged();
+#else
+  inline void set_check_merged() {}
+#endif
   /** See comments for set_metadata_id() */
   enum enum_table_ref_type m_table_ref_type;
   /** See comments for set_metadata_id() */
diff --git a/sql/winservice.c b/sql/winservice.c
index 51a5a07a820..e4e0a3bd596 100644
--- a/sql/winservice.c
+++ b/sql/winservice.c
@@ -116,7 +116,7 @@ int get_mysql_service_properties(const wchar_t *bin_path,
     wcscat(mysqld_path, L".exe");
 
   if(wcsicmp(file_part, L"mysqld.exe") != 0 && 
-    wcsicmp(file_part, L"mysqld.exe") != 0 &&
+    wcsicmp(file_part, L"mysqld-debug.exe") != 0 &&
     wcsicmp(file_part, L"mysqld-nt.exe") != 0)
   {
     /* The service executable is not mysqld. */
@@ -244,4 +244,4 @@ int get_mysql_service_properties(const wchar_t *bin_path,
 end:
   LocalFree((HLOCAL)args);
   return retval;
-}
\ No newline at end of file
+}
diff --git a/storage/myisam/mi_preload.c b/storage/myisam/mi_preload.c
index 5c974cbea0e..767858a6ea0 100644
--- a/storage/myisam/mi_preload.c
+++ b/storage/myisam/mi_preload.c
@@ -53,6 +53,9 @@ int mi_preload(MI_INFO *info, ulonglong key_map, my_bool ignore_leaves)
   if (!keys || !mi_is_any_key_active(key_map) || key_file_length == pos)
     DBUG_RETURN(0);
 
+  /* Preload into a non initialized key cache should never happen. */
+  DBUG_ASSERT(share->key_cache->key_cache_inited);
+
   block_length= keyinfo[0].block_length;
 
   if (ignore_leaves)
diff --git a/storage/oqgraph/graphcore.cc b/storage/oqgraph/graphcore.cc
index 0b856ac253f..ba179989ea3 100644
--- a/storage/oqgraph/graphcore.cc
+++ b/storage/oqgraph/graphcore.cc
@@ -414,7 +414,7 @@ namespace open_query {
           if (record_weight && u != v)
           {
             typename graph_traits<Graph>::out_edge_iterator ei, ei_end;
-            for (tie(ei, ei_end)= out_edges(v, g); ei != ei_end; ++ei)
+            for (boost::tuples::tie(ei, ei_end)= out_edges(v, g); ei != ei_end; ++ei)
             {
               if (target(*ei, g) == u)
               {
@@ -479,14 +479,14 @@ namespace open_query
     if (in_degree(dest, g) >= out_degree(orig, g))
     {
       graph_traits<Graph>::out_edge_iterator ei, ei_end;
-      tie(ei, ei_end)= out_edges(orig, g);
+      boost::tuples::tie(ei, ei_end)= out_edges(orig, g);
       if ((ei= find_if(ei, ei_end, target_equals(dest, g))) != ei_end)
         return *ei;
     }
     else
     {
       graph_traits<Graph>::in_edge_iterator ei, ei_end;
-      tie(ei, ei_end)= in_edges(dest, g);
+      boost::tuples::tie(ei, ei_end)= in_edges(dest, g);
       if ((ei= find_if(ei, ei_end, source_equals(orig, g))) != ei_end)
         return *ei;
     }
@@ -727,7 +727,7 @@ namespace open_query
         if ((cursor= new (std::nothrow) stack_cursor(share)) && orig)
         {
           graph_traits<Graph>::out_edge_iterator ei, ei_end;
-          for (tie(ei, ei_end)= out_edges(*orig, share->g); ei != ei_end; ++ei)
+          for (boost::tuples::tie(ei, ei_end)= out_edges(*orig, share->g); ei != ei_end; ++ei)
           {
             Vertex v= target(*ei, share->g);
             static_cast<stack_cursor*>(cursor)->
@@ -741,7 +741,7 @@ namespace open_query
 	    dest)
         {
           graph_traits<Graph>::in_edge_iterator ei, ei_end;
-          for (tie(ei, ei_end)= in_edges(*dest, share->g); ei != ei_end; ++ei)
+          for (boost::tuples::tie(ei, ei_end)= in_edges(*dest, share->g); ei != ei_end; ++ei)
           {
             Vertex v= source(*ei, share->g);
             static_cast<stack_cursor*>(cursor)->
@@ -876,7 +876,7 @@ namespace open_query
           switch (ALGORITHM & op)
           {
           case DIJKSTRAS:
-            dijkstra_shortest_paths(r, *dest,
+            dijkstra_shortest_paths(r.m_g, *dest,
                 weight_map(
                   share->weightmap
                 ).
@@ -1067,7 +1067,7 @@ int edges_cursor::fetch_row(const row &row_info, row &result)
   edge_iterator it, end;
   reference ref;
   size_t count= position;
-  for (tie(it, end)= edges(share->g); count && it != end; ++it, --count)
+  for (boost::tuples::tie(it, end)= edges(share->g); count && it != end; ++it, --count)
     ;
   if (it != end)
     ref= reference(position+1, *it);
diff --git a/storage/xtradb/btr/btr0btr.c b/storage/xtradb/btr/btr0btr.c
index ca98afc04ad..433b062bcec 100644
--- a/storage/xtradb/btr/btr0btr.c
+++ b/storage/xtradb/btr/btr0btr.c
@@ -1523,7 +1523,7 @@ btr_free_root(
 	}
 	ut_a(block);
 
-	btr_search_drop_page_hash_index(block, NULL);
+	btr_search_drop_page_hash_index(block);
 
 	header = buf_block_get_frame(block) + PAGE_HEADER + PAGE_BTR_SEG_TOP;
 #ifdef UNIV_BTR_DEBUG
@@ -1592,7 +1592,7 @@ btr_page_reorganize_low(
 
 #ifndef UNIV_HOTBACKUP
 	if (UNIV_LIKELY(!recovery)) {
-		btr_search_drop_page_hash_index(block, index);
+		btr_search_drop_page_hash_index(block);
 	}
 
 	block->check_index_page_at_flush = TRUE;
@@ -1760,7 +1760,7 @@ btr_page_empty(
 	ut_a(!page_zip || page_zip_validate(page_zip, page));
 #endif /* UNIV_ZIP_DEBUG */
 
-	btr_search_drop_page_hash_index(block, index);
+	btr_search_drop_page_hash_index(block);
 	btr_blob_dbg_remove(page, index, "btr_page_empty");
 
 	/* Recreate the page: note that global data on page (possible
@@ -3093,7 +3093,7 @@ btr_lift_page_up(
 		mem_heap_free(heap);
 	}
 
-	btr_search_drop_page_hash_index(block, index);
+	btr_search_drop_page_hash_index(block);
 
 	/* Make the father empty */
 	btr_page_empty(father_block, father_page_zip, index, page_level, mtr);
@@ -3317,7 +3317,7 @@ err_exit:
 			goto err_exit;
 		}
 
-		btr_search_drop_page_hash_index(block, index);
+		btr_search_drop_page_hash_index(block);
 
 		/* Remove the page from the level list */
 		btr_level_list_remove(space, zip_size, page, index, mtr);
@@ -3358,7 +3358,7 @@ err_exit:
 			goto err_exit;
 		}
 
-		btr_search_drop_page_hash_index(block, index);
+		btr_search_drop_page_hash_index(block);
 
 #ifdef UNIV_BTR_DEBUG
 		if (UNIV_LIKELY_NULL(merge_page_zip)) {
@@ -3473,7 +3473,7 @@ btr_discard_only_page_on_level(
 		ut_a(btr_page_get_next(page, mtr) == FIL_NULL);
 
 		ut_ad(mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX));
-		btr_search_drop_page_hash_index(block, index);
+		btr_search_drop_page_hash_index(block);
 
 		btr_page_get_father(index, block, mtr, &cursor);
 		father = btr_cur_get_block(&cursor);
@@ -3578,7 +3578,7 @@ btr_discard_page(
 
 	page = buf_block_get_frame(block);
 	ut_a(page_is_comp(merge_page) == page_is_comp(page));
-	btr_search_drop_page_hash_index(block, index);
+	btr_search_drop_page_hash_index(block);
 
 	if (left_page_no == FIL_NULL && !page_is_leaf(page)) {
 
diff --git a/storage/xtradb/btr/btr0cur.c b/storage/xtradb/btr/btr0cur.c
index 717663a123a..43313474071 100644
--- a/storage/xtradb/btr/btr0cur.c
+++ b/storage/xtradb/btr/btr0cur.c
@@ -488,8 +488,6 @@ btr_cur_search_to_nth_level(
 	cursor->flag = BTR_CUR_BINARY;
 	cursor->index = index;
 
-	cursor->ibuf_cnt = ULINT_UNDEFINED;
-
 #ifndef BTR_CUR_ADAPT
 	guess = NULL;
 #else
@@ -800,21 +798,8 @@ retry_page_get:
 			/* We're doing a search on an ibuf tree and we're one
 			level above the leaf page. */
 
-			ulint	is_min_rec;
-
 			ut_ad(level == 0);
 
-			is_min_rec = rec_get_info_bits(node_ptr, 0)
-				& REC_INFO_MIN_REC_FLAG;
-
-			if (!is_min_rec) {
-				cursor->ibuf_cnt
-					= ibuf_rec_get_counter(node_ptr);
-
-				ut_a(cursor->ibuf_cnt <= 0xFFFF
-				     || cursor->ibuf_cnt == ULINT_UNDEFINED);
-			}
-
 			buf_mode = BUF_GET;
 			rw_latch = RW_NO_LATCH;
 			goto retry_page_get;
@@ -2007,7 +1992,7 @@ btr_cur_update_in_place(
 	was_delete_marked = rec_get_deleted_flag(
 		rec, page_is_comp(buf_block_get_frame(block)));
 
-	is_hashed = block->is_hashed;
+	is_hashed = (block->index != NULL);
 
 	if (is_hashed) {
 		/* TO DO: Can we skip this if none of the fields
@@ -3683,16 +3668,11 @@ btr_record_not_null_field_in_rec(
 	}
 
 	for (i = 0; i < n_unique; i++) {
-		ulint	rec_len;
-
-		rec_get_nth_field_offs(offsets, i, &rec_len);
-
-		if (rec_len != UNIV_SQL_NULL) {
-			n_not_null[i]++;
-		} else {
-			/* Break if we hit the first NULL value */
+		if (rec_offs_nth_sql_null(offsets, i)) {
 			break;
 		}
+
+		n_not_null[i]++;
 	}
 }
 
@@ -3840,8 +3820,7 @@ btr_estimate_number_of_different_key_vals(
 
 			if (n_not_null) {
 				btr_record_not_null_field_in_rec(
-					n_cols, offsets_next_rec,
-					n_not_null);
+					n_cols, offsets_next_rec, n_not_null);
 			}
 
 			total_external_size
diff --git a/storage/xtradb/btr/btr0pcur.c b/storage/xtradb/btr/btr0pcur.c
index 081ef9c9457..e6a9ddcf43e 100644
--- a/storage/xtradb/btr/btr0pcur.c
+++ b/storage/xtradb/btr/btr0pcur.c
@@ -253,6 +253,8 @@ btr_pcur_restore_position_func(
 			cursor->rel_pos == BTR_PCUR_BEFORE_FIRST_IN_TREE,
 			index, latch_mode, btr_pcur_get_btr_cur(cursor), mtr);
 
+		cursor->latch_mode = latch_mode;
+		cursor->pos_state = BTR_PCUR_IS_POSITIONED;
 		cursor->block_when_stored = btr_pcur_get_block(cursor);
 
 		return(FALSE);
diff --git a/storage/xtradb/btr/btr0sea.c b/storage/xtradb/btr/btr0sea.c
index f27afe216ec..bddbcc79dd6 100644
--- a/storage/xtradb/btr/btr0sea.c
+++ b/storage/xtradb/btr/btr0sea.c
@@ -44,15 +44,11 @@ Created 2/17/1996 Heikki Tuuri
 #include "ha0ha.h"
 #include "srv0srv.h"
 /** Flag: has the search system been enabled?
-Protected by btr_search_latch and btr_search_enabled_mutex. */
+Protected by btr_search_latch. */
 UNIV_INTERN char		btr_search_enabled	= TRUE;
-UNIV_INTERN ibool		btr_search_fully_disabled = FALSE;
 
 UNIV_INTERN ulint		btr_search_index_num	= 1;
 
-/** Mutex protecting btr_search_enabled */
-static mutex_t			btr_search_enabled_mutex;
-
 #ifdef UNIV_PFS_MUTEX
 /* Key to register btr_search_enabled_mutex with performance schema */
 UNIV_INTERN mysql_pfs_key_t	btr_search_enabled_mutex_key;
@@ -186,8 +182,6 @@ btr_search_sys_create(
 
 	//rw_lock_create(btr_search_latch_key, &btr_search_latch,
 	//	       SYNC_SEARCH_SYS);
-	mutex_create(btr_search_enabled_mutex_key,
-		     &btr_search_enabled_mutex, SYNC_SEARCH_SYS_CONF);
 
 	btr_search_sys = mem_alloc(sizeof(btr_search_sys_t));
 
@@ -238,27 +232,40 @@ void
 btr_search_disable(void)
 /*====================*/
 {
-	mutex_enter(&btr_search_enabled_mutex);
+	dict_table_t*	table;
+	ulint i;
+
+	mutex_enter(&dict_sys->mutex);
 	btr_search_x_lock_all();
 
-	/* Disable access to hash index, also tell ha_insert_for_fold()
-	stop adding new nodes to hash index, but still allow updating
-	existing nodes */
 	btr_search_enabled = FALSE;
 
-	/* Clear all block->is_hashed flags and remove all entries
-	from btr_search_sys->hash_index. */
-	buf_pool_drop_hash_index();
+	/* Clear the index->search_info->ref_count of every index in
+	the data dictionary cache. */
+	for (table = UT_LIST_GET_FIRST(dict_sys->table_LRU); table;
+	     table = UT_LIST_GET_NEXT(table_LRU, table)) {
 
-	/* hash index has been cleaned up, disallow any operation to
-	the hash index */
-	btr_search_fully_disabled = TRUE;
+		dict_index_t*	index;
 
-	/* btr_search_enabled_mutex should guarantee this. */
-	ut_ad(!btr_search_enabled);
+		for (index = dict_table_get_first_index(table); index;
+		     index = dict_table_get_next_index(index)) {
+
+			index->search_info->ref_count = 0;
+		}
+	}
+
+	mutex_exit(&dict_sys->mutex);
+
+	/* Set all block->index = NULL. */
+	buf_pool_clear_hash_index();
+
+	/* Clear the adaptive hash index. */
+	for (i = 0; i < btr_search_index_num; i++) {
+		hash_table_clear(btr_search_sys->hash_index[i]);
+		mem_heap_empty(btr_search_sys->hash_index[i]->heap);
+	}
 
 	btr_search_x_unlock_all();
-	mutex_exit(&btr_search_enabled_mutex);
 }
 
 /********************************************************************//**
@@ -268,14 +275,11 @@ void
 btr_search_enable(void)
 /*====================*/
 {
-	mutex_enter(&btr_search_enabled_mutex);
 	btr_search_x_lock_all();
 
 	btr_search_enabled = TRUE;
-	btr_search_fully_disabled = FALSE;
 
 	btr_search_x_unlock_all();
-	mutex_exit(&btr_search_enabled_mutex);
 }
 
 /*****************************************************************//**
@@ -499,7 +503,7 @@ btr_search_update_block_hash_info(
 	    && (block->n_bytes == info->n_bytes)
 	    && (block->left_side == info->left_side)) {
 
-		if ((block->is_hashed)
+		if ((block->index)
 		    && (block->curr_n_fields == info->n_fields)
 		    && (block->curr_n_bytes == info->n_bytes)
 		    && (block->curr_left_side == info->left_side)) {
@@ -528,7 +532,7 @@ btr_search_update_block_hash_info(
 	     / BTR_SEARCH_PAGE_BUILD_LIMIT)
 	    && (info->n_hash_potential >= BTR_SEARCH_BUILD_LIMIT)) {
 
-		if ((!block->is_hashed)
+		if ((!block->index)
 		    || (block->n_hash_helps
 			> 2 * page_get_n_recs(block->frame))
 		    || (block->n_fields != block->curr_n_fields)
@@ -560,9 +564,9 @@ btr_search_update_hash_ref(
 	buf_block_t*	block,	/*!< in: buffer block where cursor positioned */
 	btr_cur_t*	cursor)	/*!< in: cursor */
 {
+	dict_index_t*	index;
 	ulint		fold;
-	rec_t*		rec;
-	index_id_t	index_id;
+	const rec_t*	rec;
 
 	ut_ad(cursor->flag == BTR_CUR_HASH_FAIL);
 #ifdef UNIV_SYNC_DEBUG
@@ -573,13 +577,15 @@ btr_search_update_hash_ref(
 	ut_ad(page_align(btr_cur_get_rec(cursor))
 	      == buf_block_get_frame(block));
 
-	if (!block->is_hashed) {
+	index = block->index;
+
+	if (!index) {
 
 		return;
 	}
 
-	ut_a(block->index == cursor->index);
-	ut_a(!dict_index_is_ibuf(cursor->index));
+	ut_a(index == cursor->index);
+	ut_a(!dict_index_is_ibuf(index));
 
 	if ((info->n_hash_potential > 0)
 	    && (block->curr_n_fields == info->n_fields)
@@ -596,12 +602,11 @@ btr_search_update_hash_ref(
 			return;
 		}
 
-		index_id = cursor->index->id;
 		fold = rec_fold(rec,
-				rec_get_offsets(rec, cursor->index, offsets_,
+				rec_get_offsets(rec, index, offsets_,
 						ULINT_UNDEFINED, &heap),
 				block->curr_n_fields,
-				block->curr_n_bytes, index_id);
+				block->curr_n_bytes, index->id);
 		if (UNIV_LIKELY_NULL(heap)) {
 			mem_heap_free(heap);
 		}
@@ -870,7 +875,7 @@ btr_search_guess_on_hash(
 {
 	buf_pool_t*	buf_pool;
 	buf_block_t*	block;
-	rec_t*		rec;
+	const rec_t*	rec;
 	ulint		fold;
 	index_id_t	index_id;
 #ifdef notdefined
@@ -956,7 +961,7 @@ btr_search_guess_on_hash(
 
 	ut_ad(page_rec_is_user_rec(rec));
 
-	btr_cur_position(index, rec, block, cursor);
+	btr_cur_position(index, (rec_t*) rec, block, cursor);
 
 	/* Check the validity of the guess within the page */
 
@@ -1058,11 +1063,10 @@ UNIV_INTERN
 void
 btr_search_drop_page_hash_index(
 /*============================*/
-	buf_block_t*	block,	/*!< in: block containing index page,
+	buf_block_t*	block)	/*!< in: block containing index page,
 				s- or x-latched, or an index page
 				for which we know that
 				block->buf_fix_count == 0 */
-	dict_index_t*	index_in)
 {
 	hash_table_t*		table;
 	ulint			n_fields;
@@ -1080,24 +1084,14 @@ btr_search_drop_page_hash_index(
 	const dict_index_t*	index;
 	ulint*			offsets;
 
-#ifdef UNIV_SYNC_DEBUG
-	if (index_in) {
-		ut_ad(!rw_lock_own(btr_search_get_latch(index_in->id), RW_LOCK_SHARED));
-		ut_ad(!rw_lock_own(btr_search_get_latch(index_in->id), RW_LOCK_EX));
-	}
-#endif /* UNIV_SYNC_DEBUG */
-
 retry:
-	if (index_in) {
-		index = index_in;
-		rw_lock_s_lock(btr_search_get_latch(index->id));
-	} else if (btr_search_index_num > 1) {
+	if (btr_search_index_num > 1) {
 		rw_lock_t*	btr_search_latch;
 
 		/* FIXME: This may be optimistic implementation still. */
 		btr_search_latch = (rw_lock_t*)(block->btr_search_latch);
 		if (UNIV_LIKELY(!btr_search_latch)) {
-			if (block->is_hashed) {
+			if (block->index) {
 				goto retry;
 			}
 			return;
@@ -1107,7 +1101,7 @@ retry:
 			rw_lock_s_unlock(btr_search_latch);
 			goto retry;
 		}
-		if (UNIV_LIKELY(!block->is_hashed)) {
+		if (UNIV_LIKELY(!block->index)) {
 			rw_lock_s_unlock(btr_search_latch);
 			goto retry;
 		}
@@ -1116,18 +1110,16 @@ retry:
 	} else {
 		/* btr_search_index_num == 1 */
 		/* btr_search_latch is only one and able to obtain
-		   before evaluating block->is_hashed. */
+		   before evaluating block->index. */
 		rw_lock_s_lock(btr_search_latch_part[0]);
-		if (UNIV_LIKELY(!block->is_hashed)) {
+		if (UNIV_LIKELY(!block->index)) {
 			rw_lock_s_unlock(btr_search_latch_part[0]);
 			return;
 		}
 		index = block->index;
 	}
 
-	page = block->frame;
-
-	if (UNIV_LIKELY(!block->is_hashed)) {
+	if (UNIV_LIKELY(!index)) {
 
 		rw_lock_s_unlock(btr_search_get_latch(index->id));
 
@@ -1155,6 +1147,7 @@ retry:
 
 	ut_a(n_fields + n_bytes > 0);
 
+	page = block->frame;
 	n_recs = page_get_n_recs(page);
 
 	/* Calculate and cache fold values into an array for fast deletion
@@ -1203,7 +1196,7 @@ next_rec:
 
 	rw_lock_x_lock(btr_search_get_latch(index->id));
 
-	if (UNIV_UNLIKELY(!block->is_hashed)) {
+	if (UNIV_UNLIKELY(!block->index)) {
 		/* Someone else has meanwhile dropped the hash index */
 
 		goto cleanup;
@@ -1231,10 +1224,9 @@ next_rec:
 	ut_a(index->search_info->ref_count > 0);
 	index->search_info->ref_count--;
 
-	block->is_hashed = FALSE;
 	block->index = NULL;
 	block->btr_search_latch = NULL;
-	
+
 cleanup:
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	if (UNIV_UNLIKELY(block->n_pointers)) {
@@ -1309,7 +1301,7 @@ retry:
 					if (buf_block_get_state(block)
 					    != BUF_BLOCK_FILE_PAGE
 					    || block->index != index
-					    || !block->is_hashed) {
+					    || !block->index) {
 						continue;
 					}
 
@@ -1375,7 +1367,7 @@ next_rec:
 
 					rw_lock_x_lock(btr_search_get_latch(index->id));
 
-					if (UNIV_UNLIKELY(!block->is_hashed)) {
+					if (UNIV_UNLIKELY(!block->index)) {
 						goto cleanup;
 					}
 
@@ -1400,7 +1392,6 @@ next_rec:
 					ut_a(index->search_info->ref_count > 0);
 					index->search_info->ref_count--;
 
-					block->is_hashed = FALSE;
 					block->index = NULL;
 					block->btr_search_latch = NULL;
 
@@ -1434,8 +1425,8 @@ cleanup:
 }
 
 /********************************************************************//**
-Drops a page hash index when a page is freed from a fseg to the file system.
-Drops possible hash index if the page happens to be in the buffer pool. */
+Drops a possible page hash index when a page is evicted from the buffer pool
+or freed in a file segment. */
 UNIV_INTERN
 void
 btr_search_drop_page_hash_when_freed(
@@ -1448,32 +1439,23 @@ btr_search_drop_page_hash_when_freed(
 	buf_block_t*	block;
 	mtr_t		mtr;
 
-	if (!buf_page_peek_if_search_hashed(space, page_no)) {
-
-		return;
-	}
-
 	mtr_start(&mtr);
 
-	/* We assume that if the caller has a latch on the page, then the
-	caller has already dropped the hash index for the page, and we never
-	get here. Therefore we can acquire the s-latch to the page without
-	having to fear a deadlock. */
+	/* If the caller has a latch on the page, then the caller must
+	have a x-latch on the page and it must have already dropped
+	the hash index for the page. Because of the x-latch that we
+	are possibly holding, we cannot s-latch the page, but must
+	(recursively) x-latch it, even though we are only reading. */
 
-	block = buf_page_get_gen(space, zip_size, page_no, RW_S_LATCH, NULL,
+	block = buf_page_get_gen(space, zip_size, page_no, RW_X_LATCH, NULL,
 				 BUF_PEEK_IF_IN_POOL, __FILE__, __LINE__,
 				 &mtr);
-	/* Because the buffer pool mutex was released by
-	buf_page_peek_if_search_hashed(), it is possible that the
-	block was removed from the buffer pool by another thread
-	before buf_page_get_gen() got a chance to acquire the buffer
-	pool mutex again.  Thus, we must check for a NULL return. */
 
-	if (UNIV_LIKELY(block != NULL)) {
+	if (block && block->index) {
 
 		buf_block_dbg_add_level(block, SYNC_TREE_NODE_FROM_HASH);
 
-		btr_search_drop_page_hash_index(block, NULL);
+		btr_search_drop_page_hash_index(block);
 	}
 
 	mtr_commit(&mtr);
@@ -1501,7 +1483,6 @@ btr_search_build_page_hash_index(
 	rec_t*		next_rec;
 	ulint		fold;
 	ulint		next_fold;
-	index_id_t	index_id;
 	ulint		n_cached;
 	ulint		n_recs;
 	ulint*		folds;
@@ -1526,13 +1507,13 @@ btr_search_build_page_hash_index(
 
 	rw_lock_s_lock(btr_search_get_latch(index->id));
 
-	if (block->is_hashed && ((block->curr_n_fields != n_fields)
+	if (block->index && ((block->curr_n_fields != n_fields)
 				 || (block->curr_n_bytes != n_bytes)
 				 || (block->curr_left_side != left_side))) {
 
 		rw_lock_s_unlock(btr_search_get_latch(index->id));
 
-		btr_search_drop_page_hash_index(block, index);
+		btr_search_drop_page_hash_index(block);
 	} else {
 		rw_lock_s_unlock(btr_search_get_latch(index->id));
 	}
@@ -1565,7 +1546,7 @@ btr_search_build_page_hash_index(
 
 	n_cached = 0;
 
-	index_id = btr_page_get_index_id(page);
+	ut_a(index->id == btr_page_get_index_id(page));
 
 	rec = page_rec_get_next(page_get_infimum_rec(page));
 
@@ -1580,7 +1561,7 @@ btr_search_build_page_hash_index(
 		}
 	}
 
-	fold = rec_fold(rec, offsets, n_fields, n_bytes, index_id);
+	fold = rec_fold(rec, offsets, n_fields, n_bytes, index->id);
 
 	if (left_side) {
 
@@ -1607,7 +1588,7 @@ btr_search_build_page_hash_index(
 		offsets = rec_get_offsets(next_rec, index, offsets,
 					  n_fields + (n_bytes > 0), &heap);
 		next_fold = rec_fold(next_rec, offsets, n_fields,
-				     n_bytes, index_id);
+				     n_bytes, index->id);
 
 		if (fold != next_fold) {
 			/* Insert an entry into the hash index */
@@ -1632,13 +1613,13 @@ btr_search_build_page_hash_index(
 
 	rw_lock_x_lock(btr_search_get_latch(index->id));
 
-	if (UNIV_UNLIKELY(btr_search_fully_disabled)) {
+	if (UNIV_UNLIKELY(!btr_search_enabled)) {
 		goto exit_func;
 	}
 
-	if (block->is_hashed && ((block->curr_n_fields != n_fields)
-				 || (block->curr_n_bytes != n_bytes)
-				 || (block->curr_left_side != left_side))) {
+	if (block->index && ((block->curr_n_fields != n_fields)
+			     || (block->curr_n_bytes != n_bytes)
+			     || (block->curr_left_side != left_side))) {
 		goto exit_func;
 	}
 
@@ -1647,11 +1628,10 @@ btr_search_build_page_hash_index(
 	rebuild hash index for a page that is already hashed, we
 	have to take care not to increment the counter in that
 	case. */
-	if (!block->is_hashed) {
+	if (!block->index) {
 		index->search_info->ref_count++;
 	}
 
-	block->is_hashed = TRUE;
 	block->n_hash_helps = 0;
 
 	block->curr_n_fields = n_fields;
@@ -1700,23 +1680,24 @@ btr_search_move_or_delete_hash_entries(
 	ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
 	ut_ad(rw_lock_own(&(new_block->lock), RW_LOCK_EX));
 #endif /* UNIV_SYNC_DEBUG */
-	ut_a(!new_block->is_hashed || new_block->index == index);
-	ut_a(!block->is_hashed || block->index == index);
-	ut_a(!(new_block->is_hashed || block->is_hashed)
-	     || !dict_index_is_ibuf(index));
 
 	rw_lock_s_lock(btr_search_get_latch(index->id));
 
-	if (new_block->is_hashed) {
+	ut_a(!new_block->index || new_block->index == index);
+	ut_a(!block->index || block->index == index);
+	ut_a(!(new_block->index || block->index)
+	     || !dict_index_is_ibuf(index));
+
+	if (new_block->index) {
 
 		rw_lock_s_unlock(btr_search_get_latch(index->id));
 
-		btr_search_drop_page_hash_index(block, index);
+		btr_search_drop_page_hash_index(block);
 
 		return;
 	}
 
-	if (block->is_hashed) {
+	if (block->index) {
 
 		n_fields = block->curr_n_fields;
 		n_bytes = block->curr_n_bytes;
@@ -1753,42 +1734,48 @@ btr_search_update_hash_on_delete(
 {
 	hash_table_t*	table;
 	buf_block_t*	block;
-	rec_t*		rec;
+	const rec_t*	rec;
 	ulint		fold;
-	index_id_t	index_id;
+	dict_index_t*	index;
 	ulint		offsets_[REC_OFFS_NORMAL_SIZE];
 	mem_heap_t*	heap		= NULL;
 	rec_offs_init(offsets_);
 
-	rec = btr_cur_get_rec(cursor);
-
 	block = btr_cur_get_block(cursor);
 
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
 #endif /* UNIV_SYNC_DEBUG */
 
-	if (!block->is_hashed) {
+	index = block->index;
+
+	if (!index) {
 
 		return;
 	}
 
-	ut_a(block->index == cursor->index);
+	ut_a(index == cursor->index);
 	ut_a(block->curr_n_fields + block->curr_n_bytes > 0);
-	ut_a(!dict_index_is_ibuf(cursor->index));
+	ut_a(!dict_index_is_ibuf(index));
 
 	table = btr_search_get_hash_index(cursor->index->id);
 
-	index_id = cursor->index->id;
-	fold = rec_fold(rec, rec_get_offsets(rec, cursor->index, offsets_,
+	rec = btr_cur_get_rec(cursor);
+
+	fold = rec_fold(rec, rec_get_offsets(rec, index, offsets_,
 					     ULINT_UNDEFINED, &heap),
-			block->curr_n_fields, block->curr_n_bytes, index_id);
+			block->curr_n_fields, block->curr_n_bytes, index->id);
 	if (UNIV_LIKELY_NULL(heap)) {
 		mem_heap_free(heap);
 	}
+
 	rw_lock_x_lock(btr_search_get_latch(cursor->index->id));
 
-	ha_search_and_delete_if_found(table, fold, rec);
+	if (block->index) {
+		ut_a(block->index == index);
+
+		ha_search_and_delete_if_found(table, fold, rec);
+	}
 
 	rw_lock_x_unlock(btr_search_get_latch(cursor->index->id));
 }
@@ -1806,6 +1793,7 @@ btr_search_update_hash_node_on_insert(
 {
 	hash_table_t*	table;
 	buf_block_t*	block;
+	dict_index_t*	index;
 	rec_t*		rec;
 
 	rec = btr_cur_get_rec(cursor);
@@ -1816,16 +1804,25 @@ btr_search_update_hash_node_on_insert(
 	ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
 #endif /* UNIV_SYNC_DEBUG */
 
-	if (!block->is_hashed) {
+	index = block->index;
+
+	if (!index) {
 
 		return;
 	}
 
-	ut_a(block->index == cursor->index);
-	ut_a(!dict_index_is_ibuf(cursor->index));
+	ut_a(cursor->index == index);
+	ut_a(!dict_index_is_ibuf(index));
 
 	rw_lock_x_lock(btr_search_get_latch(cursor->index->id));
 
+	if (!block->index) {
+
+		goto func_exit;
+	}
+
+	ut_a(block->index == index);
+
 	if ((cursor->flag == BTR_CUR_HASH)
 	    && (cursor->n_fields == block->curr_n_fields)
 	    && (cursor->n_bytes == block->curr_n_bytes)
@@ -1836,6 +1833,7 @@ btr_search_update_hash_node_on_insert(
 		ha_search_and_update_if_found(table, cursor->fold, rec,
 					      block, page_rec_get_next(rec));
 
+func_exit:
 		rw_lock_x_unlock(btr_search_get_latch(cursor->index->id));
 	} else {
 		rw_lock_x_unlock(btr_search_get_latch(cursor->index->id));
@@ -1857,10 +1855,10 @@ btr_search_update_hash_on_insert(
 {
 	hash_table_t*	table;
 	buf_block_t*	block;
+	dict_index_t*	index;
 	rec_t*		rec;
 	rec_t*		ins_rec;
 	rec_t*		next_rec;
-	index_id_t	index_id;
 	ulint		fold;
 	ulint		ins_fold;
 	ulint		next_fold = 0; /* remove warning (??? bug ???) */
@@ -1885,15 +1883,15 @@ btr_search_update_hash_on_insert(
 	ut_ad(rw_lock_own(&(block->lock), RW_LOCK_EX));
 #endif /* UNIV_SYNC_DEBUG */
 
-	if (!block->is_hashed) {
+	index = block->index;
+
+	if (!index) {
 
 		return;
 	}
 
-	ut_a(block->index == cursor->index);
-	ut_a(!dict_index_is_ibuf(cursor->index));
-
-	index_id = cursor->index->id;
+	ut_a(index == cursor->index);
+	ut_a(!dict_index_is_ibuf(index));
 
 	n_fields = block->curr_n_fields;
 	n_bytes = block->curr_n_bytes;
@@ -1902,28 +1900,32 @@ btr_search_update_hash_on_insert(
 	ins_rec = page_rec_get_next(rec);
 	next_rec = page_rec_get_next(ins_rec);
 
-	offsets = rec_get_offsets(ins_rec, cursor->index, offsets,
+	offsets = rec_get_offsets(ins_rec, index, offsets,
 				  ULINT_UNDEFINED, &heap);
-	ins_fold = rec_fold(ins_rec, offsets, n_fields, n_bytes, index_id);
+	ins_fold = rec_fold(ins_rec, offsets, n_fields, n_bytes, index->id);
 
 	if (!page_rec_is_supremum(next_rec)) {
-		offsets = rec_get_offsets(next_rec, cursor->index, offsets,
+		offsets = rec_get_offsets(next_rec, index, offsets,
 					  n_fields + (n_bytes > 0), &heap);
 		next_fold = rec_fold(next_rec, offsets, n_fields,
-				     n_bytes, index_id);
+				     n_bytes, index->id);
 	}
 
 	if (!page_rec_is_infimum(rec)) {
-		offsets = rec_get_offsets(rec, cursor->index, offsets,
+		offsets = rec_get_offsets(rec, index, offsets,
 					  n_fields + (n_bytes > 0), &heap);
-		fold = rec_fold(rec, offsets, n_fields, n_bytes, index_id);
+		fold = rec_fold(rec, offsets, n_fields, n_bytes, index->id);
 	} else {
 		if (left_side) {
 
-			rw_lock_x_lock(btr_search_get_latch(index_id));
+			rw_lock_x_lock(btr_search_get_latch(index->id));
 
 			locked = TRUE;
 
+			if (!btr_search_enabled) {
+				goto function_exit;
+			}
+
 			ha_insert_for_fold(table, ins_fold, block, ins_rec);
 		}
 
@@ -1934,9 +1936,13 @@ btr_search_update_hash_on_insert(
 
 		if (!locked) {
 
-			rw_lock_x_lock(btr_search_get_latch(index_id));
+			rw_lock_x_lock(btr_search_get_latch(index->id));
 
 			locked = TRUE;
+
+			if (!btr_search_enabled) {
+				goto function_exit;
+			}
 		}
 
 		if (!left_side) {
@@ -1952,9 +1958,13 @@ check_next_rec:
 		if (!left_side) {
 
 			if (!locked) {
-				rw_lock_x_lock(btr_search_get_latch(index_id));
+				rw_lock_x_lock(btr_search_get_latch(index->id));
 
 				locked = TRUE;
+
+				if (!btr_search_enabled) {
+					goto function_exit;
+				}
 			}
 
 			ha_insert_for_fold(table, ins_fold, block, ins_rec);
@@ -1967,9 +1977,13 @@ check_next_rec:
 
 		if (!locked) {
 
-			rw_lock_x_lock(btr_search_get_latch(index_id));
+			rw_lock_x_lock(btr_search_get_latch(index->id));
 
 			locked = TRUE;
+
+			if (!btr_search_enabled) {
+				goto function_exit;
+			}
 		}
 
 		if (!left_side) {
@@ -1977,7 +1991,7 @@ check_next_rec:
 			ha_insert_for_fold(table, ins_fold, block, ins_rec);
 			/*
 			fputs("Hash insert for ", stderr);
-			dict_index_name_print(stderr, cursor->index);
+			dict_index_name_print(stderr, index);
 			fprintf(stderr, " fold %lu\n", ins_fold);
 			*/
 		} else {
@@ -1990,7 +2004,7 @@ function_exit:
 		mem_heap_free(heap);
 	}
 	if (locked) {
-		rw_lock_x_unlock(btr_search_get_latch(index_id));
+		rw_lock_x_unlock(btr_search_get_latch(index->id));
 	}
 }
 
@@ -2082,21 +2096,20 @@ btr_search_validate(void)
 
 			ut_a(!dict_index_is_ibuf(block->index));
 
-			offsets = rec_get_offsets((const rec_t*) node->data,
+			page_index_id = btr_page_get_index_id(block->frame);
+
+			offsets = rec_get_offsets(node->data,
 						  block->index, offsets,
 						  block->curr_n_fields
 						  + (block->curr_n_bytes > 0),
 						  &heap);
 
-			page_index_id = btr_page_get_index_id(block->frame);
-
-			if (UNIV_UNLIKELY
-			    (!block->is_hashed || node->fold
-			     != rec_fold((rec_t*)(node->data),
-					 offsets,
-					 block->curr_n_fields,
-					 block->curr_n_bytes,
-					 page_index_id))) {
+			if (!block->index || node->fold
+			    != rec_fold(node->data,
+					offsets,
+					block->curr_n_fields,
+					block->curr_n_bytes,
+					page_index_id)) {
 				const page_t*	page = block->frame;
 
 				ok = FALSE;
@@ -2112,20 +2125,19 @@ btr_search_validate(void)
 					node->data,
 					(ullint) page_index_id,
 					(ulong) node->fold,
-					(ulong) rec_fold((rec_t*)(node->data),
+					(ulong) rec_fold(node->data,
 							 offsets,
 							 block->curr_n_fields,
 							 block->curr_n_bytes,
 							 page_index_id));
 
 				fputs("InnoDB: Record ", stderr);
-				rec_print_new(stderr, (rec_t*)node->data,
-					      offsets);
+				rec_print_new(stderr, node->data, offsets);
 				fprintf(stderr, "\nInnoDB: on that page."
-					" Page mem address %p, is hashed %lu,"
+					" Page mem address %p, is hashed %p,"
 					" n fields %lu, n bytes %lu\n"
 					"InnoDB: side %lu\n",
-					(void*) page, (ulong) block->is_hashed,
+					(void*) page, (void*) block->index,
 					(ulong) block->curr_n_fields,
 					(ulong) block->curr_n_bytes,
 					(ulong) block->curr_left_side);
diff --git a/storage/xtradb/buf/buf0buf.c b/storage/xtradb/buf/buf0buf.c
index 4bc2c26cde2..11b079dd0ef 100644
--- a/storage/xtradb/buf/buf0buf.c
+++ b/storage/xtradb/buf/buf0buf.c
@@ -917,6 +917,16 @@ pfs_register_buffer_block(
 		rwlock->pfs_psi = (PSI_server)
 			? PSI_server->init_rwlock(buf_block_lock_key, rwlock)
 			: NULL;
+
+#   ifdef UNIV_SYNC_DEBUG
+		rwlock = &block->debug_latch;
+		ut_a(!rwlock->pfs_psi);
+		rwlock->pfs_psi = (PSI_server)
+			? PSI_server->init_rwlock(buf_block_debug_latch_key,
+						  rwlock)
+			: NULL;
+#   endif /* UNIV_SYNC_DEBUG */
+
 #  endif /* UNIV_PFS_RWLOCK */
 		block++;
 	}
@@ -952,8 +962,6 @@ buf_block_init(
 	block->index = NULL;
 	block->btr_search_latch = NULL;
 
-	block->is_hashed = FALSE;
-
 #ifdef UNIV_DEBUG
 	block->page.in_page_hash = FALSE;
 	block->page.in_zip_hash = FALSE;
@@ -980,17 +988,24 @@ buf_block_init(
 
 	mutex_create(PFS_NOT_INSTRUMENTED, &block->mutex, SYNC_BUF_BLOCK);
 	rw_lock_create(PFS_NOT_INSTRUMENTED, &block->lock, SYNC_LEVEL_VARYING);
+
+# ifdef UNIV_SYNC_DEBUG
+	rw_lock_create(PFS_NOT_INSTRUMENTED,
+		       &block->debug_latch, SYNC_NO_ORDER_CHECK);
+# endif /* UNIV_SYNC_DEBUG */
+
 #else /* PFS_SKIP_BUFFER_MUTEX_RWLOCK || PFS_GROUP_BUFFER_SYNC */
 	mutex_create(buffer_block_mutex_key, &block->mutex, SYNC_BUF_BLOCK);
 	rw_lock_create(buf_block_lock_key, &block->lock, SYNC_LEVEL_VARYING);
+
+# ifdef UNIV_SYNC_DEBUG
+	rw_lock_create(buf_block_debug_latch_key,
+		       &block->debug_latch, SYNC_NO_ORDER_CHECK);
+# endif /* UNIV_SYNC_DEBUG */
 #endif /* PFS_SKIP_BUFFER_MUTEX_RWLOCK || PFS_GROUP_BUFFER_SYNC */
 
 	ut_ad(rw_lock_validate(&(block->lock)));
 
-#ifdef UNIV_SYNC_DEBUG
-	rw_lock_create(buf_block_debug_latch_key,
-		       &block->debug_latch, SYNC_NO_ORDER_CHECK);
-#endif /* UNIV_SYNC_DEBUG */
 }
 
 /********************************************************************//**
@@ -1317,6 +1332,26 @@ buf_pool_free_instance(
 {
 	buf_chunk_t*	chunk;
 	buf_chunk_t*	chunks;
+	buf_page_t*	bpage;
+
+	bpage = UT_LIST_GET_LAST(buf_pool->LRU);
+	while (bpage != NULL) {
+		buf_page_t*	prev_bpage = UT_LIST_GET_PREV(LRU, bpage);
+		enum buf_page_state	state = buf_page_get_state(bpage);
+
+		ut_ad(buf_page_in_file(bpage));
+		ut_ad(bpage->in_LRU_list);
+
+		if (state != BUF_BLOCK_FILE_PAGE) {
+			/* We must not have any dirty block except
+			when doing a fast shutdown. */
+			ut_ad(state == BUF_BLOCK_ZIP_PAGE
+			      || srv_fast_shutdown == 2);
+			buf_page_free_descriptor(bpage);
+		}
+
+		bpage = prev_bpage;
+	}
 
 	chunks = buf_pool->chunks;
 	chunk = chunks + buf_pool->n_chunks;
@@ -1392,87 +1427,13 @@ buf_pool_free(
 }
 
 /********************************************************************//**
-Drops adaptive hash index for a buffer pool instance. */
-static
-void
-buf_pool_drop_hash_index_instance(
-/*==============================*/
-	buf_pool_t*	buf_pool,		/*!< in: buffer pool instance */
-	ibool*		released_search_latch)	/*!< out: flag for signalling
-						whether the search latch was
-						released */
-{
-	buf_chunk_t*	chunks	= buf_pool->chunks;
-	buf_chunk_t*	chunk	= chunks + buf_pool->n_chunks;
-
-	while (--chunk >= chunks) {
-		ulint		i;
-		buf_block_t*	block	= chunk->blocks;
-
-		for (i = chunk->size; i--; block++) {
-			/* block->is_hashed cannot be modified
-			when we have an x-latch on btr_search_latch;
-			see the comment in buf0buf.h */
-
-			if (!block->is_hashed) {
-				continue;
-			}
-
-			/* To follow the latching order, we
-			have to release btr_search_latch
-			before acquiring block->latch. */
-			btr_search_x_unlock_all();
-			/* When we release the search latch,
-			we must rescan all blocks, because
-			some may become hashed again. */
-			*released_search_latch = TRUE;
-
-			rw_lock_x_lock(&block->lock);
-
-			/* This should be guaranteed by the
-			callers, which will be holding
-			btr_search_enabled_mutex. */
-			ut_ad(!btr_search_enabled);
-
-			/* Because we did not buffer-fix the
-			block by calling buf_block_get_gen(),
-			it is possible that the block has been
-			allocated for some other use after
-			btr_search_latch was released above.
-			We do not care which file page the
-			block is mapped to.  All we want to do
-			is to drop any hash entries referring
-			to the page. */
-
-			/* It is possible that
-			block->page.state != BUF_FILE_PAGE.
-			Even that does not matter, because
-			btr_search_drop_page_hash_index() will
-			check block->is_hashed before doing
-			anything.  block->is_hashed can only
-			be set on uncompressed file pages. */
-
-			btr_search_drop_page_hash_index(block, NULL);
-
-			rw_lock_x_unlock(&block->lock);
-
-			btr_search_x_lock_all();
-
-			ut_ad(!btr_search_enabled);
-		}
-	}
-}
-
-/********************************************************************//**
-Drops the adaptive hash index.  To prevent a livelock, this function
-is only to be called while holding btr_search_latch and while
-btr_search_enabled == FALSE. */
+Clears the adaptive hash index on all pages in the buffer pool. */
 UNIV_INTERN
 void
-buf_pool_drop_hash_index(void)
-/*==========================*/
+buf_pool_clear_hash_index(void)
+/*===========================*/
 {
-	ibool		released_search_latch;
+	ulint	p;
 
 #ifdef UNIV_SYNC_DEBUG
 	ulint	j;
@@ -1483,21 +1444,34 @@ buf_pool_drop_hash_index(void)
 #endif /* UNIV_SYNC_DEBUG */
 	ut_ad(!btr_search_enabled);
 
-	do {
- 		ulint	i;
+	for (p = 0; p < srv_buf_pool_instances; p++) {
+		buf_pool_t*	buf_pool = buf_pool_from_array(p);
+		buf_chunk_t*	chunks	= buf_pool->chunks;
+		buf_chunk_t*	chunk	= chunks + buf_pool->n_chunks;
 
-		released_search_latch = FALSE;
+		while (--chunk >= chunks) {
+			buf_block_t*	block	= chunk->blocks;
+			ulint		i	= chunk->size;
 
-		for (i = 0; i < srv_buf_pool_instances; i++) {
- 			buf_pool_t*	buf_pool;
+			for (; i--; block++) {
+				dict_index_t*	index	= block->index;
 
-			buf_pool = buf_pool_from_array(i);
+				/* We can set block->index = NULL
+				when we have an x-latch on btr_search_latch;
+				see the comment in buf0buf.h */
 
-			buf_pool_drop_hash_index_instance(
-				buf_pool, &released_search_latch);
+				if (!index) {
+					/* Not hashed */
+					continue;
+				}
+
+				block->index = NULL;
+# if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
+				block->n_pointers = 0;
+# endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
+			}
 		}
-
-	} while (released_search_latch);
+	}
 }
 
 /********************************************************************//**
@@ -1638,12 +1612,12 @@ buf_pool_watch_set(
 
 	rw_lock_x_lock(&buf_pool->page_hash_latch);
 	bpage = buf_page_hash_get_low(buf_pool, space, offset, fold);
-	if (bpage) {
-		block_mutex = buf_page_get_mutex_enter(bpage);
-		ut_a(block_mutex);
-	}
 
 	if (UNIV_LIKELY_NULL(bpage)) {
+
+		block_mutex = buf_page_get_mutex_enter(bpage);
+		ut_a(block_mutex);
+
 		if (!buf_pool_watch_is_sentinel(buf_pool, bpage)) {
 			/* The page was loaded meanwhile. */
 			rw_lock_x_unlock(&buf_pool->page_hash_latch);
@@ -1895,40 +1869,6 @@ buf_reset_check_index_page_at_flush(
 	rw_lock_s_unlock(&buf_pool->page_hash_latch);
 }
 
-/********************************************************************//**
-Returns the current state of is_hashed of a page. FALSE if the page is
-not in the pool. NOTE that this operation does not fix the page in the
-pool if it is found there.
-@return	TRUE if page hash index is built in search system */
-UNIV_INTERN
-ibool
-buf_page_peek_if_search_hashed(
-/*===========================*/
-	ulint	space,	/*!< in: space id */
-	ulint	offset)	/*!< in: page number */
-{
-	buf_block_t*	block;
-	ibool		is_hashed;
-	buf_pool_t*	buf_pool = buf_pool_get(space, offset);
-
-	//buf_pool_mutex_enter(buf_pool);
-	rw_lock_s_lock(&buf_pool->page_hash_latch);
-
-	block = (buf_block_t*) buf_page_hash_get(buf_pool, space, offset);
-
-	if (!block || buf_block_get_state(block) != BUF_BLOCK_FILE_PAGE) {
-		is_hashed = FALSE;
-	} else {
-		ut_ad(!buf_pool_watch_is_sentinel(buf_pool, &block->page));
-		is_hashed = block->is_hashed;
-	}
-
-	//buf_pool_mutex_exit(buf_pool);
-	rw_lock_s_unlock(&buf_pool->page_hash_latch);
-
-	return(is_hashed);
-}
-
 #if defined UNIV_DEBUG_FILE_ACCESSES || defined UNIV_DEBUG
 /********************************************************************//**
 Sets file_page_was_freed TRUE if the page is found in the buffer pool.
@@ -2218,7 +2158,6 @@ buf_block_init_low(
 	block->btr_search_latch	= NULL;
 
 	block->n_hash_helps	= 0;
-	block->is_hashed	= FALSE;
 	block->n_fields		= 1;
 	block->n_bytes		= 0;
 	block->left_side	= TRUE;
@@ -4473,6 +4412,9 @@ buf_pool_validate_instance(
 					ut_a(rw_lock_is_locked(&block->lock,
 							       RW_LOCK_EX));
 					break;
+
+				case BUF_IO_PIN:
+					break;
 				}
 
 				n_lru++;
@@ -4502,6 +4444,7 @@ buf_pool_validate_instance(
 		ut_a(buf_page_get_state(b) == BUF_BLOCK_ZIP_PAGE);
 		switch (buf_page_get_io_fix(b)) {
 		case BUF_IO_NONE:
+		case BUF_IO_PIN:
 			/* All clean blocks should be I/O-unfixed. */
 			break;
 		case BUF_IO_READ:
@@ -4541,6 +4484,7 @@ buf_pool_validate_instance(
 			switch (buf_page_get_io_fix(b)) {
 			case BUF_IO_NONE:
 			case BUF_IO_READ:
+			case BUF_IO_PIN:
 				break;
 			case BUF_IO_WRITE:
 				switch (buf_page_get_flush_type(b)) {
diff --git a/storage/xtradb/buf/buf0flu.c b/storage/xtradb/buf/buf0flu.c
index 73a9ff96289..d776a274d14 100644
--- a/storage/xtradb/buf/buf0flu.c
+++ b/storage/xtradb/buf/buf0flu.c
@@ -1399,6 +1399,7 @@ buf_flush_try_neighbors(
 	ulint		high;
 	ulint		count = 0;
 	buf_pool_t*	buf_pool = buf_pool_get(space, offset);
+	ibool		is_forward_scan;
 
 	ut_ad(flush_type == BUF_FLUSH_LRU || flush_type == BUF_FLUSH_LIST);
 
@@ -1429,7 +1430,32 @@ buf_flush_try_neighbors(
 		high = fil_space_get_size(space);
 	}
 
-	for (i = low; i < high; i++) {
+	if (srv_flush_neighbor_pages == 2) {
+
+		/* In the case of contiguous flush where the requested page
+		does not fall at the start of flush area, first scan backward
+		from the page and later forward from it. */
+		is_forward_scan = (offset == low);
+	}
+	else {
+		is_forward_scan = TRUE;
+	}
+
+scan:
+	if (srv_flush_neighbor_pages == 2) {
+		if (is_forward_scan) {
+			i = offset;
+		}
+		else {
+			i = offset - 1;
+		}
+	}
+	else {
+		i = low;
+	}
+
+	for (; is_forward_scan ? (i < high) : (i >= low);
+	     is_forward_scan ? i++ : i--) {
 
 		buf_page_t*	bpage;
 
@@ -1460,6 +1486,12 @@ buf_flush_try_neighbors(
 
 			//buf_pool_mutex_exit(buf_pool);
 			rw_lock_s_unlock(&buf_pool->page_hash_latch);
+			if (srv_flush_neighbor_pages == 2) {
+
+				/* This is contiguous neighbor page flush and
+				the pages here are not contiguous. */
+				break;
+			}
 			continue;
 		}
 
@@ -1495,6 +1527,22 @@ buf_flush_try_neighbors(
 		}
 		//buf_pool_mutex_exit(buf_pool);
 		rw_lock_s_unlock(&buf_pool->page_hash_latch);
+
+		if (srv_flush_neighbor_pages == 2) {
+
+			/* We are trying to do the contiguous neighbor page
+			flush, but the last page we checked was unflushable,
+			making a "hole" in the flush, so stop this attempt. */
+			break;
+		}
+	}
+
+	if (!is_forward_scan) {
+
+		/* Backward scan done, now do the forward scan */
+		ut_a (srv_flush_neighbor_pages == 2);
+		is_forward_scan = TRUE;
+		goto scan;
 	}
 
 	return(count);
@@ -1988,6 +2036,22 @@ buf_flush_list(
 
 		buf_pool = buf_pool_from_array(i);
 
+		if (lsn_limit != IB_ULONGLONG_MAX) {
+			buf_page_t*	bpage;
+
+			buf_flush_list_mutex_enter(buf_pool);
+			bpage = UT_LIST_GET_LAST(buf_pool->flush_list);
+			if (!bpage
+			    || bpage->oldest_modification >= lsn_limit) {
+
+				buf_flush_list_mutex_exit(buf_pool);
+				continue;
+			} else {
+
+				buf_flush_list_mutex_exit(buf_pool);
+			}
+		}
+
 		if (!buf_flush_start(buf_pool, BUF_FLUSH_LIST)) {
 			/* We have two choices here. If lsn_limit was
 			specified then skipping an instance of buffer
diff --git a/storage/xtradb/buf/buf0lru.c b/storage/xtradb/buf/buf0lru.c
index a5a811f7afe..ecad1cf1e64 100644
--- a/storage/xtradb/buf/buf0lru.c
+++ b/storage/xtradb/buf/buf0lru.c
@@ -68,8 +68,12 @@ allowed to point to either end of the LRU list. */
 
 /** When dropping the search hash index entries before deleting an ibd
 file, we build a local array of pages belonging to that tablespace
-in the buffer pool. Following is the size of that array. */
-#define BUF_LRU_DROP_SEARCH_HASH_SIZE	1024
+in the buffer pool. Following is the size of that array.
+We also release buf_pool->mutex after scanning this many pages of the
+flush_list when dropping a table. This is to ensure that other threads
+are not blocked for extended period of time when using very large
+buffer pools. */
+#define BUF_LRU_DROP_SEARCH_SIZE	1024
 
 /** If we switch on the InnoDB monitor because there are too few available
 frames in the buffer pool, we set this to TRUE */
@@ -222,7 +226,7 @@ buf_LRU_drop_page_hash_batch(
 	ulint	i;
 
 	ut_ad(arr != NULL);
-	ut_ad(count <= BUF_LRU_DROP_SEARCH_HASH_SIZE);
+	ut_ad(count <= BUF_LRU_DROP_SEARCH_SIZE);
 
 	for (i = 0; i < count; ++i) {
 		btr_search_drop_page_hash_when_freed(space_id, zip_size,
@@ -256,7 +260,7 @@ buf_LRU_drop_page_hash_for_tablespace(
 	}
 
 	page_arr = ut_malloc(
-		sizeof(ulint) * BUF_LRU_DROP_SEARCH_HASH_SIZE);
+		sizeof(ulint) * BUF_LRU_DROP_SEARCH_SIZE);
 
 	//buf_pool_mutex_enter(buf_pool);
 	mutex_enter(&buf_pool->LRU_list_mutex);
@@ -293,7 +297,7 @@ next_page:
 
 		//mutex_enter(&((buf_block_t*) bpage)->mutex);
 		is_fixed = bpage->buf_fix_count > 0
-			|| !((buf_block_t*) bpage)->is_hashed;
+			|| !((buf_block_t*) bpage)->index;
 		//mutex_exit(&((buf_block_t*) bpage)->mutex);
 
 		if (is_fixed) {
@@ -304,12 +308,14 @@ next_page:
 		/* Store the page number so that we can drop the hash
 		index in a batch later. */
 		page_arr[num_entries] = bpage->offset;
+
 		mutex_exit(block_mutex);
 
-		ut_a(num_entries < BUF_LRU_DROP_SEARCH_HASH_SIZE);
+		ut_a(num_entries < BUF_LRU_DROP_SEARCH_SIZE);
+
 		++num_entries;
 
-		if (num_entries < BUF_LRU_DROP_SEARCH_HASH_SIZE) {
+		if (num_entries < BUF_LRU_DROP_SEARCH_SIZE) {
 			goto next_page;
 		}
 
@@ -366,39 +372,42 @@ next_page:
 }
 
 /******************************************************************//**
-Invalidates all pages belonging to a given tablespace inside a specific
+Remove all dirty pages belonging to a given tablespace inside a specific
 buffer pool instance when we are deleting the data file(s) of that
-tablespace. */
+tablespace. The pages still remain a part of LRU and are evicted from
+the list as they age towards the tail of the LRU. */
 static
 void
-buf_LRU_invalidate_tablespace_buf_pool_instance(
-/*============================================*/
+buf_LRU_remove_dirty_pages_for_tablespace(
+/*======================================*/
 	buf_pool_t*	buf_pool,	/*!< buffer pool instance */
 	ulint		id)		/*!< in: space id */
 {
 	buf_page_t*	bpage;
 	ibool		all_freed;
+	ulint		i;
 
 scan_again:
 	//buf_pool_mutex_enter(buf_pool);
 	mutex_enter(&buf_pool->LRU_list_mutex);
 	rw_lock_x_lock(&buf_pool->page_hash_latch);
+	buf_flush_list_mutex_enter(buf_pool);
 
 	all_freed = TRUE;
 
-	bpage = UT_LIST_GET_LAST(buf_pool->LRU);
+	for (bpage = UT_LIST_GET_LAST(buf_pool->flush_list), i = 0;
+	     bpage != NULL; ++i) {
 
-	while (bpage != NULL) {
 		buf_page_t*	prev_bpage;
 		mutex_t*	block_mutex = NULL;
 
 		ut_a(buf_page_in_file(bpage));
 
-		prev_bpage = UT_LIST_GET_PREV(LRU, bpage);
+		prev_bpage = UT_LIST_GET_PREV(flush_list, bpage);
 
 		/* bpage->space and bpage->io_fix are protected by
-		buf_pool_mutex and block_mutex.  It is safe to check
-		them while holding buf_pool_mutex only. */
+		buf_pool->mutex and block_mutex. It is safe to check
+		them while holding buf_pool->mutex only. */
 
 		if (buf_page_get_space(bpage) != id) {
 			/* Skip this block, as it does not belong to
@@ -411,90 +420,97 @@ scan_again:
 
 			all_freed = FALSE;
 			goto next_page;
-		} else {
-			block_mutex = buf_page_get_mutex_enter(bpage);
-
-			if (!block_mutex) {
-				/* It may be impossible case...
-				Something wrong, so will be scan_again */
-
-				all_freed = FALSE;
-				goto next_page;
-			}
-
-			if (bpage->buf_fix_count > 0) {
-
-				mutex_exit(block_mutex);
-				/* We cannot remove this page during
-				this scan yet; maybe the system is
-				currently reading it in, or flushing
-				the modifications to the file */
-
-				all_freed = FALSE;
-
-				goto next_page;
-			}
 		}
 
-		ut_ad(mutex_own(block_mutex));
+		/* We have to release the flush_list_mutex to obey the
+		latching order. We are however guaranteed that the page
+		will stay in the flush_list because buf_flush_remove()
+		needs buf_pool->mutex as well. */
+		buf_flush_list_mutex_exit(buf_pool);
+		block_mutex = buf_page_get_mutex_enter(bpage);
 
-#ifdef UNIV_DEBUG
-		if (buf_debug_prints) {
-			fprintf(stderr,
-				"Dropping space %lu page %lu\n",
-				(ulong) buf_page_get_space(bpage),
-				(ulong) buf_page_get_page_no(bpage));
+		if (!block_mutex) {
+			/* It may be impossible case...
+			Something wrong, so will be scan_again */
+			all_freed = FALSE;
+			goto next_page;
 		}
-#endif
-		if (buf_page_get_state(bpage) != BUF_BLOCK_FILE_PAGE) {
-			/* This is a compressed-only block
-			descriptor. Do nothing. */
-		} else if (((buf_block_t*) bpage)->is_hashed) {
-			ulint	page_no;
-			ulint	zip_size;
-
-			//buf_pool_mutex_exit(buf_pool);
-			mutex_exit(&buf_pool->LRU_list_mutex);
-			rw_lock_x_unlock(&buf_pool->page_hash_latch);
-
-			zip_size = buf_page_get_zip_size(bpage);
-			page_no = buf_page_get_page_no(bpage);
 
+		if (bpage->buf_fix_count > 0) {
 			mutex_exit(block_mutex);
+			buf_flush_list_mutex_enter(buf_pool);
 
-			/* Note that the following call will acquire
-			an S-latch on the page */
+			/* We cannot remove this page during
+			this scan yet; maybe the system is
+			currently reading it in, or flushing
+			the modifications to the file */
 
-			btr_search_drop_page_hash_when_freed(
-				id, zip_size, page_no);
-			goto scan_again;
+			all_freed = FALSE;
+			goto next_page;
 		}
 
-		if (bpage->oldest_modification != 0) {
+		ut_ad(bpage->oldest_modification != 0);
 
-			buf_flush_remove(bpage);
-		}
+		buf_flush_remove(bpage);
 
-		/* Remove from the LRU list. */
-
-		if (buf_LRU_block_remove_hashed_page(bpage, TRUE)
-		    != BUF_BLOCK_ZIP_FREE) {
-			buf_LRU_block_free_hashed_page((buf_block_t*) bpage, TRUE);
-			mutex_exit(block_mutex);
-		} else {
-			/* The block_mutex should have been released
-			by buf_LRU_block_remove_hashed_page() when it
-			returns BUF_BLOCK_ZIP_FREE. */
-			ut_ad(block_mutex == &buf_pool->zip_mutex);
-			ut_ad(!mutex_own(block_mutex));
-		}
+		mutex_exit(block_mutex);
+		buf_flush_list_mutex_enter(buf_pool);
 next_page:
 		bpage = prev_bpage;
+
+		if (!bpage) {
+			break;
+		}
+
+		/* Every BUF_LRU_DROP_SEARCH_SIZE iterations in the
+		loop we release buf_pool->mutex to let other threads
+		do their job. */
+		if (i < BUF_LRU_DROP_SEARCH_SIZE) {
+			continue;
+		}
+
+		/* We IO-fix the block to make sure that the block
+		stays in its position in the flush_list. */
+		if (buf_page_get_io_fix(bpage) != BUF_IO_NONE) {
+			/* Block is already IO-fixed. We don't
+			want to change the value. Lets leave
+			this block alone. */
+			continue;
+		}
+
+		buf_flush_list_mutex_exit(buf_pool);
+		block_mutex = buf_page_get_mutex(bpage);
+		mutex_enter(block_mutex);
+		buf_page_set_sticky(bpage);
+		mutex_exit(block_mutex);
+
+		/* Now it is safe to release the buf_pool->mutex. */
+		//buf_pool_mutex_exit(buf_pool);
+		mutex_exit(&buf_pool->LRU_list_mutex);
+		rw_lock_x_unlock(&buf_pool->page_hash_latch);
+
+		os_thread_yield();
+		//buf_pool_mutex_enter(buf_pool);
+		mutex_enter(&buf_pool->LRU_list_mutex);
+		rw_lock_x_lock(&buf_pool->page_hash_latch);
+
+
+		mutex_enter(block_mutex);
+		buf_page_unset_sticky(bpage);
+		mutex_exit(block_mutex);
+
+		buf_flush_list_mutex_enter(buf_pool);
+		ut_ad(bpage->in_flush_list);
+
+		i = 0;
 	}
 
-	//buf_pool_mutex_exit(buf_pool);
+//	buf_pool_mutex_exit(buf_pool);
 	mutex_exit(&buf_pool->LRU_list_mutex);
 	rw_lock_x_unlock(&buf_pool->page_hash_latch);
+	buf_flush_list_mutex_exit(buf_pool);
+
+	ut_ad(buf_flush_validate(buf_pool));
 
 	if (!all_freed) {
 		os_thread_sleep(20000);
@@ -525,7 +541,7 @@ buf_LRU_invalidate_tablespace(
 
 		buf_pool = buf_pool_from_array(i);
 		buf_LRU_drop_page_hash_for_tablespace(buf_pool, id);
-		buf_LRU_invalidate_tablespace_buf_pool_instance(buf_pool, id);
+		buf_LRU_remove_dirty_pages_for_tablespace(buf_pool, id);
 	}
 }
 
@@ -567,7 +583,7 @@ buf_LRU_mark_space_was_deleted(
 			for (k = chunk->size; k--; block++) {
 				if (buf_block_get_state(block)
 				    != BUF_BLOCK_FILE_PAGE
-				    || !block->is_hashed
+				    || !block->index
 				    || buf_page_get_space(&block->page) != id) {
 					continue;
 				}
@@ -575,7 +591,7 @@ buf_LRU_mark_space_was_deleted(
 				btr_search_s_unlock_all();
 
 				rw_lock_x_lock(&block->lock);
-				btr_search_drop_page_hash_index(block, NULL);
+				btr_search_drop_page_hash_index(block);
 				rw_lock_x_unlock(&block->lock);
 
 				btr_search_s_lock_all();
@@ -1726,8 +1742,7 @@ not_freed:
 			/* Prevent buf_page_get_gen() from
 			decompressing the block while we release
 			buf_pool->mutex and block_mutex. */
-			b->buf_fix_count++;
-			b->io_fix = BUF_IO_READ;
+			buf_page_set_sticky(b);
 			mutex_exit(&buf_pool->zip_mutex);
 		}
 
@@ -1744,7 +1759,7 @@ not_freed:
 
 		UNIV_MEM_VALID(((buf_block_t*) bpage)->frame,
 			       UNIV_PAGE_SIZE);
-		btr_search_drop_page_hash_index((buf_block_t*) bpage, NULL);
+		btr_search_drop_page_hash_index((buf_block_t*) bpage);
 		UNIV_MEM_INVALID(((buf_block_t*) bpage)->frame,
 				 UNIV_PAGE_SIZE);
 
@@ -1772,8 +1787,7 @@ not_freed:
 
 		if (b) {
 			mutex_enter(&buf_pool->zip_mutex);
-			b->buf_fix_count--;
-			buf_page_set_io_fix(b, BUF_IO_NONE);
+			buf_page_unset_sticky(b);
 			mutex_exit(&buf_pool->zip_mutex);
 		}
 
diff --git a/storage/xtradb/dict/dict0dict.c b/storage/xtradb/dict/dict0dict.c
index 07f22e4d1d6..98cf88455bd 100644
--- a/storage/xtradb/dict/dict0dict.c
+++ b/storage/xtradb/dict/dict0dict.c
@@ -919,6 +919,11 @@ dict_index_find_on_id_low(
 	dict_table_t*	table;
 	dict_index_t*	index;
 
+	/* This can happen if the system tablespace is the wrong page size */
+	if (dict_sys == NULL) {
+		return(NULL);
+	}
+
 	table = UT_LIST_GET_FIRST(dict_sys->table_LRU);
 
 	while (table) {
diff --git a/storage/xtradb/dict/dict0load.c b/storage/xtradb/dict/dict0load.c
index 47f969727fb..5303557548b 100644
--- a/storage/xtradb/dict/dict0load.c
+++ b/storage/xtradb/dict/dict0load.c
@@ -849,7 +849,7 @@ loop:
 			object and check that the .ibd file exists. */
 
 			fil_open_single_table_tablespace(FALSE, space_id,
-							 flags, name);
+							 flags, name, NULL);
 		}
 
 		mem_free(name);
@@ -1904,7 +1904,7 @@ err_exit:
 			if (!fil_open_single_table_tablespace(
 				TRUE, table->space,
 				table->flags == DICT_TF_COMPACT ? 0 :
-				table->flags & ~(~0 << DICT_TF_BITS), name)) {
+				table->flags & ~(~0 << DICT_TF_BITS), name, NULL)) {
 				/* We failed to find a sensible
 				tablespace file */
 
diff --git a/storage/xtradb/fil/fil0fil.c b/storage/xtradb/fil/fil0fil.c
index 41b61be0b5b..8cabf13e2c4 100644
--- a/storage/xtradb/fil/fil0fil.c
+++ b/storage/xtradb/fil/fil0fil.c
@@ -1827,36 +1827,44 @@ fil_write_flushed_lsn_to_data_files(
 }
 
 /*******************************************************************//**
-Reads the flushed lsn and arch no fields from a data file at database
-startup. */
+Reads the flushed lsn, arch no, and tablespace flag fields from a data
+file at database startup. */
 UNIV_INTERN
 void
-fil_read_flushed_lsn_and_arch_log_no(
-/*=================================*/
+fil_read_first_page(
+/*================*/
 	os_file_t	data_file,		/*!< in: open data file */
 	ibool		one_read_already,	/*!< in: TRUE if min and max
 						parameters below already
 						contain sensible data */
+	ulint*		flags,			/*!< out: tablespace flags */
 #ifdef UNIV_LOG_ARCHIVE
-	ulint*		min_arch_log_no,	/*!< in/out: */
-	ulint*		max_arch_log_no,	/*!< in/out: */
+	ulint*		min_arch_log_no,	/*!< out: min of archived
+						log numbers in data files */
+	ulint*		max_arch_log_no,	/*!< out: max of archived
+						log numbers in data files */
 #endif /* UNIV_LOG_ARCHIVE */
-	ib_uint64_t*	min_flushed_lsn,	/*!< in/out: */
-	ib_uint64_t*	max_flushed_lsn)	/*!< in/out: */
+	ib_uint64_t*	min_flushed_lsn,	/*!< out: min of flushed
+						lsn values in data files */
+	ib_uint64_t*	max_flushed_lsn)	/*!< out: max of flushed
+						lsn values in data files */
 {
 	byte*		buf;
-	byte*		buf2;
+	page_t*		page;
 	ib_uint64_t	flushed_lsn;
 
-	buf2 = ut_malloc(2 * UNIV_PAGE_SIZE);
+	buf = ut_malloc(2 * UNIV_PAGE_SIZE);
 	/* Align the memory for a possible read from a raw device */
-	buf = ut_align(buf2, UNIV_PAGE_SIZE);
+	page = ut_align(buf, UNIV_PAGE_SIZE);
 
-	os_file_read(data_file, buf, 0, 0, UNIV_PAGE_SIZE);
+	os_file_read(data_file, page, 0, 0, UNIV_PAGE_SIZE);
 
-	flushed_lsn = mach_read_from_8(buf + FIL_PAGE_FILE_FLUSH_LSN);
+	*flags = mach_read_from_4(page +
+		FSP_HEADER_OFFSET + FSP_SPACE_FLAGS);
 
-	ut_free(buf2);
+	flushed_lsn = mach_read_from_8(page + FIL_PAGE_FILE_FLUSH_LSN);
+
+	ut_free(buf);
 
 	if (!one_read_already) {
 		*min_flushed_lsn = flushed_lsn;
@@ -3174,8 +3182,11 @@ fil_open_single_table_tablespace(
 					accessing the first page of the file */
 	ulint		id,		/*!< in: space id */
 	ulint		flags,		/*!< in: tablespace flags */
-	const char*	name)		/*!< in: table name in the
+	const char*	name,		/*!< in: table name in the
 					databasename/tablename format */
+	trx_t*		trx)		/*!< in: transaction. This is only used
+					for IMPORT TABLESPACE, must be NULL
+					otherwise */
 {
 	os_file_t	file;
 	char*		filepath;
@@ -3393,6 +3404,11 @@ skip_info:
 			/* over write space id of all pages */
 			rec_offs_init(offsets_);
 
+			/* Unlock the data dictionary to not block queries
+			accessing other tables */
+			ut_a(trx);
+			row_mysql_unlock_data_dictionary(trx);
+
 			fprintf(stderr, "InnoDB: Progress in %%:");
 
 			for (offset = 0; offset < free_limit_bytes;
@@ -3594,6 +3610,9 @@ skip_write:
 
 			fprintf(stderr, " done.\n");
 
+			/* Reacquire the data dictionary lock */
+			row_mysql_lock_data_dictionary(trx);
+
 			/* update SYS_INDEXES set root page */
 			index = dict_table_get_first_index(table);
 			while (index) {
diff --git a/storage/xtradb/fsp/fsp0fsp.c b/storage/xtradb/fsp/fsp0fsp.c
index 5e3959a3c7f..6102c5decd8 100644
--- a/storage/xtradb/fsp/fsp0fsp.c
+++ b/storage/xtradb/fsp/fsp0fsp.c
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved.
+Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License along with
-this program; if not, write to the Free Software Foundation, Inc., 59 Temple
-Place, Suite 330, Boston, MA 02111-1307 USA
+this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
 
 *****************************************************************************/
 
@@ -50,67 +50,6 @@ Created 11/29/1995 Heikki Tuuri
 #include "dict0mem.h"
 #include "trx0sys.h"
 
-#define FSP_HEADER_OFFSET	FIL_PAGE_DATA	/* Offset of the space header
-						within a file page */
-
-/* The data structures in files are defined just as byte strings in C */
-typedef	byte	fsp_header_t;
-typedef	byte	xdes_t;
-
-/*			SPACE HEADER
-			============
-
-File space header data structure: this data structure is contained in the
-first page of a space. The space for this header is reserved in every extent
-descriptor page, but used only in the first. */
-
-/*-------------------------------------*/
-#define FSP_SPACE_ID		0	/* space id */
-#define FSP_NOT_USED		4	/* this field contained a value up to
-					which we know that the modifications
-					in the database have been flushed to
-					the file space; not used now */
-#define	FSP_SIZE		8	/* Current size of the space in
-					pages */
-#define	FSP_FREE_LIMIT		12	/* Minimum page number for which the
-					free list has not been initialized:
-					the pages >= this limit are, by
-					definition, free; note that in a
-					single-table tablespace where size
-					< 64 pages, this number is 64, i.e.,
-					we have initialized the space
-					about the first extent, but have not
-					physically allocted those pages to the
-					file */
-#define	FSP_SPACE_FLAGS		16	/* table->flags & ~DICT_TF_COMPACT */
-#define	FSP_FRAG_N_USED		20	/* number of used pages in the
-					FSP_FREE_FRAG list */
-#define	FSP_FREE		24	/* list of free extents */
-#define	FSP_FREE_FRAG		(24 + FLST_BASE_NODE_SIZE)
-					/* list of partially free extents not
-					belonging to any segment */
-#define	FSP_FULL_FRAG		(24 + 2 * FLST_BASE_NODE_SIZE)
-					/* list of full extents not belonging
-					to any segment */
-#define FSP_SEG_ID		(24 + 3 * FLST_BASE_NODE_SIZE)
-					/* 8 bytes which give the first unused
-					segment id */
-#define FSP_SEG_INODES_FULL	(32 + 3 * FLST_BASE_NODE_SIZE)
-					/* list of pages containing segment
-					headers, where all the segment inode
-					slots are reserved */
-#define FSP_SEG_INODES_FREE	(32 + 4 * FLST_BASE_NODE_SIZE)
-					/* list of pages containing segment
-					headers, where not all the segment
-					header slots are reserved */
-/*-------------------------------------*/
-/* File space header size */
-#define	FSP_HEADER_SIZE		(32 + 5 * FLST_BASE_NODE_SIZE)
-
-#define	FSP_FREE_ADD		4	/* this many free extents are added
-					to the free list from above
-					FSP_FREE_LIMIT at a time */
-
 /*			FILE SEGMENT INODE
 			==================
 
diff --git a/storage/xtradb/ha/ha0ha.c b/storage/xtradb/ha/ha0ha.c
index b28995553e0..2f5051e541f 100644
--- a/storage/xtradb/ha/ha0ha.c
+++ b/storage/xtradb/ha/ha0ha.c
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -88,41 +88,6 @@ ha_create_func(
 	return(table);
 }
 
-/*************************************************************//**
-Empties a hash table and frees the memory heaps. */
-UNIV_INTERN
-void
-ha_clear(
-/*=====*/
-	hash_table_t*	table)	/*!< in, own: hash table */
-{
-	ulint	i;
-	ulint	n;
-
-	ut_ad(table);
-	ut_ad(table->magic_n == HASH_TABLE_MAGIC_N);
-#ifdef UNIV_SYNC_DEBUG
-	/* cannot identificate which btr_search_latch[i] for now */
-	//ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EXCLUSIVE));
-#endif /* UNIV_SYNC_DEBUG */
-
-#ifndef UNIV_HOTBACKUP
-	/* Free the memory heaps. */
-	n = table->n_mutexes;
-
-	for (i = 0; i < n; i++) {
-		mem_heap_free(table->heaps[i]);
-	}
-#endif /* !UNIV_HOTBACKUP */
-
-	/* Clear the hash table. */
-	n = hash_get_n_cells(table);
-
-	for (i = 0; i < n; i++) {
-		hash_get_nth_cell(table, i)->node = NULL;
-	}
-}
-
 /*************************************************************//**
 Inserts an entry into a hash table. If an entry with the same fold number
 is found, its node is updated to point to the new data, and no new node
@@ -141,7 +106,7 @@ ha_insert_for_fold_func(
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	buf_block_t*	block,	/*!< in: buffer block containing the data */
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-	void*		data)	/*!< in: data, must not be NULL */
+	const rec_t*	data)	/*!< in: data, must not be NULL */
 {
 	hash_cell_t*	cell;
 	ha_node_t*	node;
@@ -154,7 +119,11 @@ ha_insert_for_fold_func(
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	ut_a(block->frame == page_align(data));
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
+#ifdef UNIV_SYNC_DEBUG
+	ut_ad(rw_lock_own(block->btr_search_latch, RW_LOCK_EX));
+#endif /* UNIV_SYNC_DEBUG */
 	ASSERT_HASH_MUTEX_OWN(table, fold);
+	ut_ad(btr_search_enabled);
 
 	hash = hash_calc_hash(fold, table);
 
@@ -174,7 +143,6 @@ ha_insert_for_fold_func(
 				prev_block->n_pointers--;
 				block->n_pointers++;
 			}
-			ut_ad(!btr_search_fully_disabled);
 # endif /* !UNIV_HOTBACKUP */
 
 			prev_node->block = block;
@@ -187,13 +155,6 @@ ha_insert_for_fold_func(
 		prev_node = prev_node->next;
 	}
 
-	/* We are in the process of disabling hash index, do not add
-	new chain node */
-	if (!btr_search_enabled) {
-		ut_ad(!btr_search_fully_disabled);
-		return(TRUE);
-	}
-
 	/* We have to allocate a new chain node */
 
 	node = mem_heap_alloc(hash_get_heap(table, fold), sizeof(ha_node_t));
@@ -251,6 +212,10 @@ ha_delete_hash_node(
 {
 	ut_ad(table);
 	ut_ad(table->magic_n == HASH_TABLE_MAGIC_N);
+#ifdef UNIV_SYNC_DEBUG
+	//	ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX));
+#endif /* UNIV_SYNC_DEBUG */
+	ut_ad(btr_search_enabled);
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 # ifndef UNIV_HOTBACKUP
 	if (table->adaptive) {
@@ -273,11 +238,11 @@ ha_search_and_update_if_found_func(
 /*===============================*/
 	hash_table_t*	table,	/*!< in/out: hash table */
 	ulint		fold,	/*!< in: folded value of the searched data */
-	void*		data,	/*!< in: pointer to the data */
+	const rec_t*	data,	/*!< in: pointer to the data */
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	buf_block_t*	new_block,/*!< in: block containing new_data */
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-	void*		new_data)/*!< in: new pointer to the data */
+	const rec_t*	new_data)/*!< in: new pointer to the data */
 {
 	ha_node_t*	node;
 
@@ -287,6 +252,13 @@ ha_search_and_update_if_found_func(
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	ut_a(new_block->frame == page_align(new_data));
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
+#ifdef UNIV_SYNC_DEBUG
+	//	ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX));
+#endif /* UNIV_SYNC_DEBUG */
+
+	if (!btr_search_enabled) {
+		return;
+	}
 
 	node = ha_search_with_data(table, fold, data);
 
@@ -323,6 +295,10 @@ ha_remove_all_nodes_to_page(
 	ut_ad(table);
 	ut_ad(table->magic_n == HASH_TABLE_MAGIC_N);
 	ASSERT_HASH_MUTEX_OWN(table, fold);
+#ifdef UNIV_SYNC_DEBUG
+	//	ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX));
+#endif /* UNIV_SYNC_DEBUG */
+	ut_ad(btr_search_enabled);
 
 	node = ha_chain_get_first(table, fold);
 
diff --git a/storage/xtradb/handler/ha_innodb.cc b/storage/xtradb/handler/ha_innodb.cc
index 3aa5ff1622d..504595b1448 100644
--- a/storage/xtradb/handler/ha_innodb.cc
+++ b/storage/xtradb/handler/ha_innodb.cc
@@ -3035,7 +3035,6 @@ skip_overwrite:
 	/* Get the current high water mark format. */
 	innobase_file_format_max = (char*) trx_sys_file_format_max_get();
 
-	btr_search_fully_disabled = (!btr_search_enabled);
 	DBUG_RETURN(FALSE);
 error:
 	DBUG_RETURN(TRUE);
@@ -5839,8 +5838,7 @@ no_commit:
 
 			switch (sql_command) {
 			case SQLCOM_LOAD:
-				if ((trx->duplicates
-				    & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))) {
+				if (trx->duplicates) {
 
 					goto set_max_autoinc;
 				}
@@ -6128,8 +6126,7 @@ ha_innobase::update_row(
 	    && table->next_number_field
 	    && new_row == table->record[0]
 	    && thd_sql_command(user_thd) == SQLCOM_INSERT
-	    && (trx->duplicates & (TRX_DUP_IGNORE | TRX_DUP_REPLACE))
-		== TRX_DUP_IGNORE)  {
+	    && trx->duplicates)  {
 
 		ulonglong	auto_inc;
 		ulonglong	col_max_value;
@@ -6515,6 +6512,7 @@ ha_innobase::index_read(
 			(byte*) key_ptr,
 			(ulint) key_len,
 			prebuilt->trx);
+		DBUG_ASSERT(prebuilt->search_tuple->n_fields > 0);
 	} else {
 		/* We position the cursor to the last or the first entry
 		in the index */
@@ -6616,7 +6614,6 @@ ha_innobase::innobase_get_index(
 	dict_index_t*	index = 0;
 
 	DBUG_ENTER("innobase_get_index");
-	ha_statistic_increment(&SSV::ha_read_key_count);
 
 	if (keynr != MAX_KEY && table->s->keys > 0) {
 		key = table->key_info + keynr;
@@ -6630,13 +6627,13 @@ ha_innobase::innobase_get_index(
 			table. Only print message if the index translation
 			table exists */
 			if (share->idx_trans_tbl.index_mapping) {
-				sql_print_error("InnoDB could not find "
-						"index %s key no %u for "
-						"table %s through its "
-						"index translation table",
-						key ? key->name : "NULL",
-						keynr,
-						prebuilt->table->name);
+				sql_print_warning("InnoDB could not find "
+						  "index %s key no %u for "
+						  "table %s through its "
+						  "index translation table",
+						  key ? key->name : "NULL",
+						  keynr,
+						  prebuilt->table->name);
 			}
 
 			index = dict_table_get_index_on_name(prebuilt->table,
@@ -8465,6 +8462,9 @@ ha_innobase::records_in_range(
 					 (const uchar*) 0),
 				(ulint) (min_key ? min_key->length : 0),
 				prebuilt->trx);
+	DBUG_ASSERT(min_key
+		    ? range_start->n_fields > 0
+		    : range_start->n_fields == 0);
 
 	row_sel_convert_mysql_key_to_innobase(
 				range_end, (byte*) key_val_buff2,
@@ -8473,6 +8473,9 @@ ha_innobase::records_in_range(
 					 (const uchar*) 0),
 				(ulint) (max_key ? max_key->length : 0),
 				prebuilt->trx);
+	DBUG_ASSERT(max_key
+		    ? range_end->n_fields > 0
+		    : range_end->n_fields == 0);
 
 	mode1 = convert_search_mode_to_innobase(min_key ? min_key->flag :
 						HA_READ_KEY_EXACT);
@@ -9217,7 +9220,10 @@ ha_innobase::check(
 		putc('\n', stderr);
 #endif
 
-		if (!btr_validate_index(index, prebuilt->trx)) {
+		/* If this is an index being created, break */
+		if (*index->name == TEMP_INDEX_PREFIX) {
+			break;
+		}  else if (!btr_validate_index(index, prebuilt->trx)) {
 			is_ok = FALSE;
 
 			innobase_format_name(
@@ -9770,6 +9776,7 @@ ha_innobase::extra(
 			break;
 		case HA_EXTRA_RESET_STATE:
 			reset_template();
+			thd_to_trx(ha_thd())->duplicates = 0;
 			break;
 		case HA_EXTRA_NO_KEYREAD:
 			prebuilt->read_just_key = 0;
@@ -9787,19 +9794,18 @@ ha_innobase::extra(
 			parameters below.  We must not invoke update_thd()
 			either, because the calling threads may change.
 			CAREFUL HERE, OR MEMORY CORRUPTION MAY OCCUR! */
-		case HA_EXTRA_IGNORE_DUP_KEY:
+		case HA_EXTRA_INSERT_WITH_UPDATE:
 			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_IGNORE;
 			break;
+		case HA_EXTRA_NO_IGNORE_DUP_KEY:
+			thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_IGNORE;
+			break;
 		case HA_EXTRA_WRITE_CAN_REPLACE:
 			thd_to_trx(ha_thd())->duplicates |= TRX_DUP_REPLACE;
 			break;
 		case HA_EXTRA_WRITE_CANNOT_REPLACE:
 			thd_to_trx(ha_thd())->duplicates &= ~TRX_DUP_REPLACE;
 			break;
-		case HA_EXTRA_NO_IGNORE_DUP_KEY:
-			thd_to_trx(ha_thd())->duplicates &=
-				~(TRX_DUP_IGNORE | TRX_DUP_REPLACE);
-			break;
 		default:/* Do nothing */
 			;
 	}
@@ -12549,10 +12555,42 @@ static MYSQL_SYSVAR_ULINT(checkpoint_age_target, srv_checkpoint_age_target,
   "Control soft limit of checkpoint age. (0 : not control)",
   NULL, NULL, 0, 0, ~0UL, 0);
 
-static MYSQL_SYSVAR_ULINT(flush_neighbor_pages, srv_flush_neighbor_pages,
-  PLUGIN_VAR_RQCMDARG,
-  "Enable/Disable flushing also neighbor pages. 0:disable 1:enable",
-  NULL, NULL, 1, 0, 1, 0);
+static
+void
+innodb_flush_neighbor_pages_update(
+  THD* thd,
+  struct st_mysql_sys_var* var,
+  void* var_ptr,
+  const void* save)
+{
+  *(long *)var_ptr = (*(long *)save) % 3;
+}
+
+const char *flush_neighbor_pages_names[]=
+{
+  "none", /* 0 */
+  "area",
+  "cont", /* 2 */
+  /* For compatibility with the older patch */
+  "0", /* "none" + 3 */
+  "1", /* "area" + 3 */
+  "2", /* "cont" + 3 */
+  NullS
+};
+
+TYPELIB flush_neighbor_pages_typelib=
+{
+  array_elements(flush_neighbor_pages_names) - 1,
+  "flush_neighbor_pages_typelib",
+  flush_neighbor_pages_names,
+  NULL
+};
+
+static MYSQL_SYSVAR_ENUM(flush_neighbor_pages, srv_flush_neighbor_pages,
+  PLUGIN_VAR_RQCMDARG, "Neighbor page flushing behaviour: none: do not flush, "
+                       "[area]: flush selected pages one-by-one, "
+                       "cont: flush a contiguous block of pages", NULL,
+  innodb_flush_neighbor_pages_update, 1, &flush_neighbor_pages_typelib);
 
 static
 void
@@ -12618,6 +12656,14 @@ static MYSQL_SYSVAR_ENUM(adaptive_flushing_method, srv_adaptive_flushing_method,
   "Choose method of innodb_adaptive_flushing. (native, [estimate], keep_average)",
   NULL, innodb_adaptive_flushing_method_update, 1, &adaptive_flushing_method_typelib);
 
+#ifdef UNIV_DEBUG
+static MYSQL_SYSVAR_ULONG(flush_checkpoint_debug, srv_flush_checkpoint_debug,
+  PLUGIN_VAR_RQCMDARG,
+  "Debug flags for InnoDB flushing and checkpointing (0=none,"
+  "1=stop preflush and checkpointing)",
+  NULL, NULL, 0, 0, 1, 0);
+#endif
+
 static MYSQL_SYSVAR_ULONG(import_table_from_xtrabackup, srv_expand_import,
   PLUGIN_VAR_RQCMDARG,
   "Enable/Disable converting automatically *.ibd files when import tablespace.",
@@ -12764,6 +12810,9 @@ static struct st_mysql_sys_var* innobase_system_variables[]= {
   MYSQL_SYSVAR(purge_threads),
   MYSQL_SYSVAR(purge_batch_size),
   MYSQL_SYSVAR(rollback_segments),
+#ifdef UNIV_DEBUG
+  MYSQL_SYSVAR(flush_checkpoint_debug),
+#endif
   MYSQL_SYSVAR(corrupt_table_action),
   MYSQL_SYSVAR(lazy_drop_table),
   MYSQL_SYSVAR(fake_changes),
diff --git a/storage/xtradb/handler/i_s.cc b/storage/xtradb/handler/i_s.cc
index 72ff5f7198b..3b87b860a4a 100644
--- a/storage/xtradb/handler/i_s.cc
+++ b/storage/xtradb/handler/i_s.cc
@@ -3916,7 +3916,7 @@ i_s_innodb_buffer_pool_pages_index_fill(
 				table->field[2]->store(block->page.offset, TRUE);
 				table->field[3]->store(page_get_n_recs(frame), TRUE);
 				table->field[4]->store(page_get_data_size(frame), TRUE);
-				table->field[5]->store(block->is_hashed, TRUE);
+				table->field[5]->store(block->index != NULL, TRUE);
 				table->field[6]->store(block->page.access_time, TRUE);
 				table->field[7]->store(block->page.newest_modification != 0, TRUE);
 				table->field[8]->store(block->page.oldest_modification != 0, TRUE);
diff --git a/storage/xtradb/ibuf/ibuf0ibuf.c b/storage/xtradb/ibuf/ibuf0ibuf.c
index 7def360867d..00b7ea7347d 100644
--- a/storage/xtradb/ibuf/ibuf0ibuf.c
+++ b/storage/xtradb/ibuf/ibuf0ibuf.c
@@ -254,11 +254,20 @@ ibuf_count_check(
 					list of the ibuf */
 /* @} */
 
+#define IBUF_REC_FIELD_SPACE	0	/*!< in the pre-4.1 format,
+					the page number. later, the space_id */
+#define IBUF_REC_FIELD_MARKER	1	/*!< starting with 4.1, a marker
+					consisting of 1 byte that is 0 */
+#define IBUF_REC_FIELD_PAGE	2	/*!< starting with 4.1, the
+					page number */
+#define IBUF_REC_FIELD_METADATA	3	/* the metadata field */
+#define IBUF_REC_FIELD_USER	4	/* first user field */
+
 /* Various constants for checking the type of an ibuf record and extracting
 data from it. For details, see the description of the record format at the
 top of this file. */
 
-/** @name Format of the fourth column of an insert buffer record
+/** @name Format of the IBUF_REC_FIELD_METADATA of an insert buffer record
 The fourth column in the MySQL 5.5 format contains an operation
 type, counter, and some flags. */
 /* @{ */
@@ -1275,13 +1284,13 @@ ibuf_rec_get_page_no_func(
 	ut_ad(ibuf_inside(mtr));
 	ut_ad(rec_get_n_fields_old(rec) > 2);
 
-	field = rec_get_nth_field_old(rec, 1, &len);
+	field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_MARKER, &len);
 
 	if (len == 1) {
 		/* This is of the >= 4.1.x record format */
 		ut_a(trx_sys_multiple_tablespace_format);
 
-		field = rec_get_nth_field_old(rec, 2, &len);
+		field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_PAGE, &len);
 	} else {
 		ut_a(trx_doublewrite_must_reset_space_ids);
 		ut_a(!trx_sys_multiple_tablespace_format);
@@ -1321,13 +1330,13 @@ ibuf_rec_get_space_func(
 	ut_ad(ibuf_inside(mtr));
 	ut_ad(rec_get_n_fields_old(rec) > 2);
 
-	field = rec_get_nth_field_old(rec, 1, &len);
+	field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_MARKER, &len);
 
 	if (len == 1) {
 		/* This is of the >= 4.1.x record format */
 
 		ut_a(trx_sys_multiple_tablespace_format);
-		field = rec_get_nth_field_old(rec, 0, &len);
+		field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_SPACE, &len);
 		ut_a(len == 4);
 
 		return(mach_read_from_4(field));
@@ -1377,9 +1386,9 @@ ibuf_rec_get_info_func(
 	      || mtr_memo_contains_page(mtr, rec, MTR_MEMO_PAGE_S_FIX));
 	ut_ad(ibuf_inside(mtr));
 	fields = rec_get_n_fields_old(rec);
-	ut_a(fields > 4);
+	ut_a(fields > IBUF_REC_FIELD_USER);
 
-	types = rec_get_nth_field_old(rec, 3, &len);
+	types = rec_get_nth_field_old(rec, IBUF_REC_FIELD_METADATA, &len);
 
 	info_len_local = len % DATA_NEW_ORDER_NULL_TYPE_BUF_SIZE;
 
@@ -1405,7 +1414,8 @@ ibuf_rec_get_info_func(
 
 	ut_a(op_local < IBUF_OP_COUNT);
 	ut_a((len - info_len_local) ==
-	     (fields - 4) * DATA_NEW_ORDER_NULL_TYPE_BUF_SIZE);
+	     (fields - IBUF_REC_FIELD_USER)
+	     * DATA_NEW_ORDER_NULL_TYPE_BUF_SIZE);
 
 	if (op) {
 		*op = op_local;
@@ -1449,7 +1459,7 @@ ibuf_rec_get_op_type_func(
 	ut_ad(ibuf_inside(mtr));
 	ut_ad(rec_get_n_fields_old(rec) > 2);
 
-	(void) rec_get_nth_field_old(rec, 1, &len);
+	(void) rec_get_nth_field_old(rec, IBUF_REC_FIELD_MARKER, &len);
 
 	if (len > 1) {
 		/* This is a < 4.1.x format record */
@@ -1478,12 +1488,12 @@ ibuf_rec_get_counter(
 	const byte*	ptr;
 	ulint		len;
 
-	if (rec_get_n_fields_old(rec) < 4) {
+	if (rec_get_n_fields_old(rec) <= IBUF_REC_FIELD_METADATA) {
 
 		return(ULINT_UNDEFINED);
 	}
 
-	ptr = rec_get_nth_field_old(rec, 3, &len);
+	ptr = rec_get_nth_field_old(rec, IBUF_REC_FIELD_METADATA, &len);
 
 	if (len >= 2) {
 
@@ -1708,7 +1718,7 @@ ibuf_build_entry_from_ibuf_rec_func(
 	      || mtr_memo_contains_page(mtr, ibuf_rec, MTR_MEMO_PAGE_S_FIX));
 	ut_ad(ibuf_inside(mtr));
 
-	data = rec_get_nth_field_old(ibuf_rec, 1, &len);
+	data = rec_get_nth_field_old(ibuf_rec, IBUF_REC_FIELD_MARKER, &len);
 
 	if (len > 1) {
 		/* This a < 4.1.x format record */
@@ -1720,13 +1730,13 @@ ibuf_build_entry_from_ibuf_rec_func(
 
 	ut_a(trx_sys_multiple_tablespace_format);
 	ut_a(*data == 0);
-	ut_a(rec_get_n_fields_old(ibuf_rec) > 4);
+	ut_a(rec_get_n_fields_old(ibuf_rec) > IBUF_REC_FIELD_USER);
 
-	n_fields = rec_get_n_fields_old(ibuf_rec) - 4;
+	n_fields = rec_get_n_fields_old(ibuf_rec) - IBUF_REC_FIELD_USER;
 
 	tuple = dtuple_create(heap, n_fields);
 
-	types = rec_get_nth_field_old(ibuf_rec, 3, &len);
+	types = rec_get_nth_field_old(ibuf_rec, IBUF_REC_FIELD_METADATA, &len);
 
 	ibuf_rec_get_info(mtr, ibuf_rec, NULL, &comp, &info_len, NULL);
 
@@ -1740,7 +1750,8 @@ ibuf_build_entry_from_ibuf_rec_func(
 	for (i = 0; i < n_fields; i++) {
 		field = dtuple_get_nth_field(tuple, i);
 
-		data = rec_get_nth_field_old(ibuf_rec, i + 4, &len);
+		data = rec_get_nth_field_old(
+			ibuf_rec, i + IBUF_REC_FIELD_USER, &len);
 
 		dfield_set_data(field, data, len);
 
@@ -1787,7 +1798,7 @@ ibuf_rec_get_size(
 		field_offset = 2;
 		types_offset = DATA_ORDER_NULL_TYPE_BUF_SIZE;
 	} else {
-		field_offset = 4;
+		field_offset = IBUF_REC_FIELD_USER;
 		types_offset = DATA_NEW_ORDER_NULL_TYPE_BUF_SIZE;
 	}
 
@@ -1848,7 +1859,7 @@ ibuf_rec_get_volume_func(
 	ut_ad(ibuf_inside(mtr));
 	ut_ad(rec_get_n_fields_old(ibuf_rec) > 2);
 
-	data = rec_get_nth_field_old(ibuf_rec, 1, &len);
+	data = rec_get_nth_field_old(ibuf_rec, IBUF_REC_FIELD_MARKER, &len);
 	pre_4_1 = (len > 1);
 
 	if (pre_4_1) {
@@ -1871,7 +1882,8 @@ ibuf_rec_get_volume_func(
 		ut_a(trx_sys_multiple_tablespace_format);
 		ut_a(*data == 0);
 
-		types = rec_get_nth_field_old(ibuf_rec, 3, &len);
+		types = rec_get_nth_field_old(
+			ibuf_rec, IBUF_REC_FIELD_METADATA, &len);
 
 		ibuf_rec_get_info(mtr, ibuf_rec, &op, &comp, &info_len, NULL);
 
@@ -1901,7 +1913,8 @@ ibuf_rec_get_volume_func(
 		}
 
 		types += info_len;
-		n_fields = rec_get_n_fields_old(ibuf_rec) - 4;
+		n_fields = rec_get_n_fields_old(ibuf_rec)
+			- IBUF_REC_FIELD_USER;
 	}
 
 	data_size = ibuf_rec_get_size(ibuf_rec, types, n_fields, pre_4_1, comp);
@@ -1956,11 +1969,11 @@ ibuf_entry_build(
 
 	n_fields = dtuple_get_n_fields(entry);
 
-	tuple = dtuple_create(heap, n_fields + 4);
+	tuple = dtuple_create(heap, n_fields + IBUF_REC_FIELD_USER);
 
 	/* 1) Space Id */
 
-	field = dtuple_get_nth_field(tuple, 0);
+	field = dtuple_get_nth_field(tuple, IBUF_REC_FIELD_SPACE);
 
 	buf = mem_heap_alloc(heap, 4);
 
@@ -1970,7 +1983,7 @@ ibuf_entry_build(
 
 	/* 2) Marker byte */
 
-	field = dtuple_get_nth_field(tuple, 1);
+	field = dtuple_get_nth_field(tuple, IBUF_REC_FIELD_MARKER);
 
 	buf = mem_heap_alloc(heap, 1);
 
@@ -1982,7 +1995,7 @@ ibuf_entry_build(
 
 	/* 3) Page number */
 
-	field = dtuple_get_nth_field(tuple, 2);
+	field = dtuple_get_nth_field(tuple, IBUF_REC_FIELD_PAGE);
 
 	buf = mem_heap_alloc(heap, 4);
 
@@ -2030,10 +2043,7 @@ ibuf_entry_build(
 		ulint			fixed_len;
 		const dict_field_t*	ifield;
 
-		/* We add 4 below because we have the 4 extra fields at the
-		start of an ibuf record */
-
-		field = dtuple_get_nth_field(tuple, i + 4);
+		field = dtuple_get_nth_field(tuple, i + IBUF_REC_FIELD_USER);
 		entry_field = dtuple_get_nth_field(entry, i);
 		dfield_copy(field, entry_field);
 
@@ -2066,13 +2076,13 @@ ibuf_entry_build(
 
 	/* 4) Type info, part #2 */
 
-	field = dtuple_get_nth_field(tuple, 3);
+	field = dtuple_get_nth_field(tuple, IBUF_REC_FIELD_METADATA);
 
 	dfield_set_data(field, type_info, ti - type_info);
 
 	/* Set all the types in the new tuple binary */
 
-	dtuple_set_types_binary(tuple, n_fields + 4);
+	dtuple_set_types_binary(tuple, n_fields + IBUF_REC_FIELD_USER);
 
 	return(tuple);
 }
@@ -2132,11 +2142,11 @@ ibuf_new_search_tuple_build(
 
 	ut_a(trx_sys_multiple_tablespace_format);
 
-	tuple = dtuple_create(heap, 3);
+	tuple = dtuple_create(heap, IBUF_REC_FIELD_METADATA);
 
 	/* Store the space id in tuple */
 
-	field = dtuple_get_nth_field(tuple, 0);
+	field = dtuple_get_nth_field(tuple, IBUF_REC_FIELD_SPACE);
 
 	buf = mem_heap_alloc(heap, 4);
 
@@ -2146,7 +2156,7 @@ ibuf_new_search_tuple_build(
 
 	/* Store the new format record marker byte */
 
-	field = dtuple_get_nth_field(tuple, 1);
+	field = dtuple_get_nth_field(tuple, IBUF_REC_FIELD_MARKER);
 
 	buf = mem_heap_alloc(heap, 1);
 
@@ -2156,7 +2166,7 @@ ibuf_new_search_tuple_build(
 
 	/* Store the page number in tuple */
 
-	field = dtuple_get_nth_field(tuple, 2);
+	field = dtuple_get_nth_field(tuple, IBUF_REC_FIELD_PAGE);
 
 	buf = mem_heap_alloc(heap, 4);
 
@@ -2164,7 +2174,7 @@ ibuf_new_search_tuple_build(
 
 	dfield_set_data(field, buf, 4);
 
-	dtuple_set_types_binary(tuple, 3);
+	dtuple_set_types_binary(tuple, IBUF_REC_FIELD_METADATA);
 
 	return(tuple);
 }
@@ -2833,8 +2843,10 @@ ibuf_get_volume_buffered_hash(
 	ulint		fold;
 	ulint		bitmask;
 
-	len = ibuf_rec_get_size(rec, types, rec_get_n_fields_old(rec) - 4,
-				FALSE, comp);
+	len = ibuf_rec_get_size(
+		rec, types,
+		rec_get_n_fields_old(rec) - IBUF_REC_FIELD_USER,
+		FALSE, comp);
 	fold = ut_fold_binary(data, len);
 
 	hash += (fold / (CHAR_BIT * sizeof *hash)) % size;
@@ -2886,8 +2898,8 @@ ibuf_get_volume_buffered_count_func(
 	ut_ad(ibuf_inside(mtr));
 
 	n_fields = rec_get_n_fields_old(rec);
-	ut_ad(n_fields > 4);
-	n_fields -= 4;
+	ut_ad(n_fields > IBUF_REC_FIELD_USER);
+	n_fields -= IBUF_REC_FIELD_USER;
 
 	rec_get_nth_field_offs_old(rec, 1, &len);
 	/* This function is only invoked when buffering new
@@ -2896,7 +2908,7 @@ ibuf_get_volume_buffered_count_func(
 	ut_a(len == 1);
 	ut_ad(trx_sys_multiple_tablespace_format);
 
-	types = rec_get_nth_field_old(rec, 3, &len);
+	types = rec_get_nth_field_old(rec, IBUF_REC_FIELD_METADATA, &len);
 
 	switch (UNIV_EXPECT(len % DATA_NEW_ORDER_NULL_TYPE_BUF_SIZE,
 			    IBUF_REC_INFO_SIZE)) {
@@ -3208,7 +3220,7 @@ ibuf_update_max_tablespace_id(void)
 	} else {
 		rec = btr_pcur_get_rec(&pcur);
 
-		field = rec_get_nth_field_old(rec, 0, &len);
+		field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_SPACE, &len);
 
 		ut_a(len == 4);
 
@@ -3230,10 +3242,12 @@ ibuf_update_max_tablespace_id(void)
 	ibuf_get_entry_counter_low_func(rec,space,page_no)
 #endif
 /****************************************************************//**
-Helper function for ibuf_set_entry_counter. Checks if rec is for (space,
-page_no), and if so, reads counter value from it and returns that + 1.
-Otherwise, returns 0.
-@return	new counter value, or 0 */
+Helper function for ibuf_get_entry_counter_func. Checks if rec is for
+(space, page_no), and if so, reads counter value from it and returns
+that + 1.
+@retval ULINT_UNDEFINED if the record does not contain any counter
+@retval 0 if the record is not for (space, page_no)
+@retval 1 + previous counter value, otherwise */
 static
 ulint
 ibuf_get_entry_counter_low_func(
@@ -3254,7 +3268,7 @@ ibuf_get_entry_counter_low_func(
 	      || mtr_memo_contains_page(mtr, rec, MTR_MEMO_PAGE_S_FIX));
 	ut_ad(rec_get_n_fields_old(rec) > 2);
 
-	field = rec_get_nth_field_old(rec, 1, &len);
+	field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_MARKER, &len);
 
 	if (UNIV_UNLIKELY(len != 1)) {
 		/* pre-4.1 format */
@@ -3267,7 +3281,7 @@ ibuf_get_entry_counter_low_func(
 	ut_a(trx_sys_multiple_tablespace_format);
 
 	/* Check the tablespace identifier. */
-	field = rec_get_nth_field_old(rec, 0, &len);
+	field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_SPACE, &len);
 	ut_a(len == 4);
 
 	if (mach_read_from_4(field) != space) {
@@ -3276,7 +3290,7 @@ ibuf_get_entry_counter_low_func(
 	}
 
 	/* Check the page offset. */
-	field = rec_get_nth_field_old(rec, 2, &len);
+	field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_PAGE, &len);
 	ut_a(len == 4);
 
 	if (mach_read_from_4(field) != page_no) {
@@ -3285,7 +3299,7 @@ ibuf_get_entry_counter_low_func(
 	}
 
 	/* Check if the record contains a counter field. */
-	field = rec_get_nth_field_old(rec, 3, &len);
+	field = rec_get_nth_field_old(rec, IBUF_REC_FIELD_METADATA, &len);
 
 	switch (len % DATA_NEW_ORDER_NULL_TYPE_BUF_SIZE) {
 	default:
@@ -3301,147 +3315,61 @@ ibuf_get_entry_counter_low_func(
 	}
 }
 
+#ifdef UNIV_DEBUG
+# define ibuf_get_entry_counter(space,page_no,rec,mtr,exact_leaf) \
+	ibuf_get_entry_counter_func(space,page_no,rec,mtr,exact_leaf)
+#else /* UNIV_DEBUG */
+# define ibuf_get_entry_counter(space,page_no,rec,mtr,exact_leaf) \
+	ibuf_get_entry_counter_func(space,page_no,rec,exact_leaf)
+#endif
+
 /****************************************************************//**
-Set the counter field in entry to the correct value based on the current
+Calculate the counter field for an entry based on the current
 last record in ibuf for (space, page_no).
-@return	FALSE if we should abort this insertion to ibuf */
+@return	the counter field, or ULINT_UNDEFINED
+if we should abort this insertion to ibuf */
 static
-ibool
-ibuf_set_entry_counter(
-/*===================*/
-	dtuple_t*	entry,		/*!< in/out: entry to patch */
+ulint
+ibuf_get_entry_counter_func(
+/*========================*/
 	ulint		space,		/*!< in: space id of entry */
 	ulint		page_no,	/*!< in: page number of entry */
-	btr_pcur_t*	pcur,		/*!< in: pcur positioned on the record
-					found by btr_pcur_open(.., entry,
-					PAGE_CUR_LE, ..., pcur, ...) */
-	ibool		is_optimistic,	/*!< in: is this an optimistic insert */
-	mtr_t*		mtr)		/*!< in: mtr */
+	const rec_t*	rec,		/*!< in: the record preceding the
+					insertion point */
+#ifdef UNIV_DEBUG
+	mtr_t*		mtr,		/*!< in: mini-transaction */
+#endif /* UNIV_DEBUG */
+	ibool		only_leaf)	/*!< in: TRUE if this is the only
+					leaf page that can contain entries
+					for (space,page_no), that is, there
+					was no exact match for (space,page_no)
+					in the node pointer */
 {
-	dfield_t*	field;
-	byte*		data;
-	ulint		counter = 0;
-
-	/* pcur points to either a user rec or to a page's infimum record. */
 	ut_ad(ibuf_inside(mtr));
-	ut_ad(mtr_memo_contains(mtr, btr_pcur_get_block(pcur),
-				MTR_MEMO_PAGE_X_FIX));
-	ut_ad(page_validate(btr_pcur_get_page(pcur), ibuf->index));
+	ut_ad(mtr_memo_contains_page(mtr, rec, MTR_MEMO_PAGE_X_FIX));
+	ut_ad(page_validate(page_align(rec), ibuf->index));
 
-	if (btr_pcur_is_on_user_rec(pcur)) {
-
-		counter = ibuf_get_entry_counter_low(
-			mtr, btr_pcur_get_rec(pcur), space, page_no);
-
-		if (UNIV_UNLIKELY(counter == ULINT_UNDEFINED)) {
-			/* The record lacks a counter field.
-			Such old records must be merged before
-			new records can be buffered. */
-
-			return(FALSE);
-		}
-	} else if (btr_pcur_is_before_first_in_tree(pcur, mtr)) {
-		/* Ibuf tree is either completely empty, or the insert
-		position is at the very first record of a non-empty tree. In
-		either case we have no previous records for (space,
-		page_no). */
-
-		counter = 0;
-	} else if (btr_pcur_is_before_first_on_page(pcur)) {
-		btr_cur_t*	cursor = btr_pcur_get_btr_cur(pcur);
-
-		if (cursor->low_match < 3) {
-			/* If low_match < 3, we know that the father node
-			pointer did not contain the searched for (space,
-			page_no), which means that the search ended on the
-			right page regardless of the counter value, and
-			since we're at the infimum record, there are no
-			existing records. */
-
-			counter = 0;
-		} else {
-			rec_t*		rec;
-			const page_t*	page;
-			buf_block_t*	block;
-			page_t*		prev_page;
-			ulint		prev_page_no;
-
-			ut_a(cursor->ibuf_cnt != ULINT_UNDEFINED);
-
-			page = btr_pcur_get_page(pcur);
-			prev_page_no = btr_page_get_prev(page, mtr);
-
-			ut_a(prev_page_no != FIL_NULL);
-
-			block = buf_page_get(
-				IBUF_SPACE_ID, 0, prev_page_no,
-				RW_X_LATCH, mtr);
-
-			buf_block_dbg_add_level(block, SYNC_IBUF_TREE_NODE);
-
-			prev_page = buf_block_get_frame(block);
-
-			rec = page_rec_get_prev(
-				page_get_supremum_rec(prev_page));
-
-			ut_ad(page_rec_is_user_rec(rec));
-
-			counter = ibuf_get_entry_counter_low(
-				mtr, rec, space, page_no);
-
-			if (UNIV_UNLIKELY(counter == ULINT_UNDEFINED)) {
-				/* The record lacks a counter field.
-				Such old records must be merged before
-				new records can be buffered. */
-
-				return(FALSE);
-			}
-
-			if (counter < cursor->ibuf_cnt) {
-				/* Search ended on the wrong page. */
-
-				if (is_optimistic) {
-					/* In an optimistic insert, we can
-					shift the insert position to the left
-					page, since it only needs an X-latch
-					on the page itself, which the
-					original search acquired for us. */
-
-					btr_cur_position(
-						ibuf->index, rec, block,
-						btr_pcur_get_btr_cur(pcur));
-				} else {
-					/* We can't shift the insert
-					position to the left page in a
-					pessimistic insert since it would
-					require an X-latch on the left
-					page's left page, so we have to
-					abort. */
-
-					return(FALSE);
-				}
-			} else {
-				/* The counter field in the father node is
-				the same as we would insert; we don't know
-				whether the insert should go to this page or
-				the left page (the later fields can differ),
-				so refuse the insert. */
-
-				return(FALSE);
-			}
-		}
+	if (page_rec_is_supremum(rec)) {
+		/* This is just for safety. The record should be a
+		page infimum or a user record. */
+		ut_ad(0);
+		return(ULINT_UNDEFINED);
+	} else if (!page_rec_is_infimum(rec)) {
+		return(ibuf_get_entry_counter_low(mtr, rec, space, page_no));
+	} else if (only_leaf
+		   || fil_page_get_prev(page_align(rec)) == FIL_NULL) {
+		/* The parent node pointer did not contain the
+		searched for (space, page_no), which means that the
+		search ended on the correct page regardless of the
+		counter value, and since we're at the infimum record,
+		there are no existing records. */
+		return(0);
 	} else {
-		/* The cursor is not positioned at or before a user record. */
-		return(FALSE);
+		/* We used to read the previous page here. It would
+		break the latching order, because the caller has
+		buffer-fixed an insert buffer bitmap page. */
+		return(ULINT_UNDEFINED);
 	}
-
-	/* Patch counter value in already built entry. */
-	field = dtuple_get_nth_field(entry, 3);
-	data = dfield_get_data(field);
-
-	mach_write_to_2(data + IBUF_REC_OFFSET_COUNTER, counter);
-
-	return(TRUE);
 }
 
 /*********************************************************************//**
@@ -3650,16 +3578,27 @@ fail_exit:
 		}
 	}
 
-	/* Patch correct counter value to the entry to insert. This can
-	change the insert position, which can result in the need to abort in
-	some cases. */
-	if (!no_counter
-	    && !ibuf_set_entry_counter(ibuf_entry, space, page_no, &pcur,
-				       mode == BTR_MODIFY_PREV, &mtr)) {
-bitmap_fail:
-		ibuf_mtr_commit(&bitmap_mtr);
+	if (!no_counter) {
+		/* Patch correct counter value to the entry to
+		insert. This can change the insert position, which can
+		result in the need to abort in some cases. */
+		ulint		counter = ibuf_get_entry_counter(
+			space, page_no, btr_pcur_get_rec(&pcur), &mtr,
+			btr_pcur_get_btr_cur(&pcur)->low_match
+			< IBUF_REC_FIELD_METADATA);
+		dfield_t*	field;
 
-		goto fail_exit;
+		if (counter == ULINT_UNDEFINED) {
+bitmap_fail:
+			ibuf_mtr_commit(&bitmap_mtr);
+			goto fail_exit;
+		}
+
+		field = dtuple_get_nth_field(
+			ibuf_entry, IBUF_REC_FIELD_METADATA);
+		mach_write_to_2(
+			(byte*) dfield_get_data(field)
+			+ IBUF_REC_OFFSET_COUNTER, counter);
 	}
 
 	/* Set the bitmap bit denoting that the insert buffer contains
@@ -4003,7 +3942,7 @@ ibuf_insert_to_index_page(
 
 	ut_ad(ibuf_inside(mtr));
 	ut_ad(dtuple_check_typed(entry));
-	ut_ad(!buf_block_align(page)->is_hashed);
+	ut_ad(!buf_block_align(page)->index);
 
 	if (UNIV_UNLIKELY(dict_table_is_comp(index->table)
 			  != (ibool)!!page_is_comp(page))) {
diff --git a/storage/xtradb/include/btr0cur.h b/storage/xtradb/include/btr0cur.h
index be918439f59..4f33aacc48e 100644
--- a/storage/xtradb/include/btr0cur.h
+++ b/storage/xtradb/include/btr0cur.h
@@ -743,24 +743,6 @@ struct btr_cur_struct {
 					NULL */
 	ulint		fold;		/*!< fold value used in the search if
 					flag is BTR_CUR_HASH */
-	/*----- Delete buffering -------*/
-	ulint		ibuf_cnt;	/* in searches done on insert buffer
-					trees, this contains the "counter"
-					value (the first two bytes of the
-					fourth field) extracted from the
-					page above the leaf page, from the
-					father node pointer that pointed to
-					the leaf page. in other words, it
-					contains the minimum counter value
-					for records to be inserted on the
-					chosen leaf page. If for some reason
-					this can't be read, or if the search
-					ended on the leftmost leaf page in
-					the tree (in which case the father
-					node pointer had the 'minimum
-					record' flag set), this is
-					ULINT_UNDEFINED. */
-	/*------------------------------*/
 	/* @} */
 	btr_path_t*	path_arr;	/*!< in estimating the number of
 					rows in range, we store in this array
diff --git a/storage/xtradb/include/btr0pcur.h b/storage/xtradb/include/btr0pcur.h
index f605c476844..140f94466db 100644
--- a/storage/xtradb/include/btr0pcur.h
+++ b/storage/xtradb/include/btr0pcur.h
@@ -263,14 +263,6 @@ btr_pcur_commit_specify_mtr(
 /*========================*/
 	btr_pcur_t*	pcur,	/*!< in: persistent cursor */
 	mtr_t*		mtr);	/*!< in: mtr to commit */
-/**************************************************************//**
-Tests if a cursor is detached: that is the latch mode is BTR_NO_LATCHES.
-@return	TRUE if detached */
-UNIV_INLINE
-ibool
-btr_pcur_is_detached(
-/*=================*/
-	btr_pcur_t*	pcur);	/*!< in: persistent cursor */
 /*********************************************************//**
 Moves the persistent cursor to the next record in the tree. If no records are
 left, the cursor stays 'after last in tree'.
diff --git a/storage/xtradb/include/btr0pcur.ic b/storage/xtradb/include/btr0pcur.ic
index d86601e5a32..054ce753c7d 100644
--- a/storage/xtradb/include/btr0pcur.ic
+++ b/storage/xtradb/include/btr0pcur.ic
@@ -388,38 +388,6 @@ btr_pcur_commit_specify_mtr(
 	pcur->pos_state = BTR_PCUR_WAS_POSITIONED;
 }
 
-/**************************************************************//**
-Sets the pcur latch mode to BTR_NO_LATCHES. */
-UNIV_INLINE
-void
-btr_pcur_detach(
-/*============*/
-	btr_pcur_t*	pcur)	/*!< in: persistent cursor */
-{
-	ut_a(pcur->pos_state == BTR_PCUR_IS_POSITIONED);
-
-	pcur->latch_mode = BTR_NO_LATCHES;
-
-	pcur->pos_state = BTR_PCUR_WAS_POSITIONED;
-}
-
-/**************************************************************//**
-Tests if a cursor is detached: that is the latch mode is BTR_NO_LATCHES.
-@return	TRUE if detached */
-UNIV_INLINE
-ibool
-btr_pcur_is_detached(
-/*=================*/
-	btr_pcur_t*	pcur)	/*!< in: persistent cursor */
-{
-	if (pcur->latch_mode == BTR_NO_LATCHES) {
-
-		return(TRUE);
-	}
-
-	return(FALSE);
-}
-
 /**************************************************************//**
 Sets the old_rec_buf field to NULL. */
 UNIV_INLINE
diff --git a/storage/xtradb/include/btr0sea.h b/storage/xtradb/include/btr0sea.h
index 9e82602934e..d9f2cf9c81b 100644
--- a/storage/xtradb/include/btr0sea.h
+++ b/storage/xtradb/include/btr0sea.h
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -137,11 +137,10 @@ UNIV_INTERN
 void
 btr_search_drop_page_hash_index(
 /*============================*/
-	buf_block_t*	block,	/*!< in: block containing index page,
+	buf_block_t*	block);	/*!< in: block containing index page,
 				s- or x-latched, or an index page
 				for which we know that
 				block->buf_fix_count == 0 */
-	dict_index_t*	index_in);
 /************************************************************************
 Drops a page hash index based on index */
 UNIV_INTERN
@@ -150,8 +149,8 @@ btr_search_drop_page_hash_index_on_index(
 /*=====================================*/
 	dict_index_t*	index);		/* in: record descriptor */
 /********************************************************************//**
-Drops a page hash index when a page is freed from a fseg to the file system.
-Drops possible hash index if the page happens to be in the buffer pool. */
+Drops a possible page hash index when a page is evicted from the buffer pool
+or freed in a file segment. */
 UNIV_INTERN
 void
 btr_search_drop_page_hash_when_freed(
@@ -235,19 +234,6 @@ void
 btr_search_s_unlock_all(void);
 /*==========================*/
 
-
-/** Flag: has the search system been enabled?
-Protected by btr_search_latch and btr_search_enabled_mutex. */
-extern char	btr_search_enabled;
-
-extern ulint	btr_search_index_num;
-
-/** Flag: whether the search system has completed its disabling process,
-It is set to TRUE right after buf_pool_drop_hash_index() in
-btr_search_disable(), indicating hash index entries are cleaned up.
-Protected by btr_search_latch and btr_search_enabled_mutex. */
-extern ibool	btr_search_fully_disabled;
-
 /** The search info struct in an index */
 struct btr_search_struct{
 	ulint	ref_count;	/*!< Number of blocks in this index tree
@@ -316,26 +302,6 @@ struct btr_search_sys_struct{
 /** The adaptive hash index */
 extern btr_search_sys_t*	btr_search_sys;
 
-/** @brief The latch protecting the adaptive search system
-
-This latch protects the
-(1) hash index;
-(2) columns of a record to which we have a pointer in the hash index;
-
-but does NOT protect:
-
-(3) next record offset field in a record;
-(4) next or previous records on the same page.
-
-Bear in mind (3) and (4) when using the hash index.
-*/
-//extern rw_lock_t*	btr_search_latch_temp;
-
-extern rw_lock_t**	btr_search_latch_part;
-
-/** The latch protecting the adaptive search system */
-//#define btr_search_latch	(*btr_search_latch_temp)
-
 #ifdef UNIV_SEARCH_PERF_STAT
 /** Number of successful adaptive hash index lookups */
 extern ulint	btr_search_n_succ;
diff --git a/storage/xtradb/include/btr0types.h b/storage/xtradb/include/btr0types.h
index 07c06fb18d7..6f515c3f58c 100644
--- a/storage/xtradb/include/btr0types.h
+++ b/storage/xtradb/include/btr0types.h
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1996, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 1996, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -30,6 +30,7 @@ Created 2/17/1996 Heikki Tuuri
 
 #include "rem0types.h"
 #include "page0types.h"
+#include "sync0rw.h"
 
 /** Persistent cursor */
 typedef struct btr_pcur_struct		btr_pcur_t;
@@ -38,6 +39,32 @@ typedef struct btr_cur_struct		btr_cur_t;
 /** B-tree search information for the adaptive hash index */
 typedef struct btr_search_struct	btr_search_t;
 
+/** @brief The latch protecting the adaptive search system
+
+This latch protects the
+(1) hash index;
+(2) columns of a record to which we have a pointer in the hash index;
+
+but does NOT protect:
+
+(3) next record offset field in a record;
+(4) next or previous records on the same page.
+
+Bear in mind (3) and (4) when using the hash index.
+*/
+//extern rw_lock_t*	btr_search_latch_temp;
+
+extern rw_lock_t**	btr_search_latch_part;
+
+/** The latch protecting the adaptive search system */
+//#define btr_search_latch	(*btr_search_latch_temp)
+
+/** Flag: has the search system been enabled?
+Protected by btr_search_latch. */
+extern char	btr_search_enabled;
+
+extern ulint	btr_search_index_num;
+
 #ifdef UNIV_BLOB_DEBUG
 # include "buf0types.h"
 /** An index->blobs entry for keeping track of off-page column references */
diff --git a/storage/xtradb/include/buf0buf.h b/storage/xtradb/include/buf0buf.h
index d85dac5cc91..0ea74fb9eb2 100644
--- a/storage/xtradb/include/buf0buf.h
+++ b/storage/xtradb/include/buf0buf.h
@@ -244,13 +244,11 @@ buf_pool_free(
 	ulint	n_instances);	/*!< in: numbere of instances to free */
 
 /********************************************************************//**
-Drops the adaptive hash index.  To prevent a livelock, this function
-is only to be called while holding btr_search_latch and while
-btr_search_enabled == FALSE. */
+Clears the adaptive hash index on all pages in the buffer pool. */
 UNIV_INTERN
 void
-buf_pool_drop_hash_index(void);
-/*==========================*/
+buf_pool_clear_hash_index(void);
+/*===========================*/
 
 /********************************************************************//**
 Relocate a buffer control block.  Relocates the block on the LRU list
@@ -583,17 +581,6 @@ buf_page_peek_if_too_old(
 /*=====================*/
 	const buf_page_t*	bpage);	/*!< in: block to make younger */
 /********************************************************************//**
-Returns the current state of is_hashed of a page. FALSE if the page is
-not in the pool. NOTE that this operation does not fix the page in the
-pool if it is found there.
-@return	TRUE if page hash index is built in search system */
-UNIV_INTERN
-ibool
-buf_page_peek_if_search_hashed(
-/*===========================*/
-	ulint	space,	/*!< in: space id */
-	ulint	offset);/*!< in: page number */
-/********************************************************************//**
 Gets the youngest modification log sequence number for a frame.
 Returns zero if not file page or no modification occurred yet.
 @return	newest modification to page */
@@ -952,7 +939,27 @@ buf_block_set_io_fix(
 /*=================*/
 	buf_block_t*	block,	/*!< in/out: control block */
 	enum buf_io_fix	io_fix);/*!< in: io_fix state */
-
+/*********************************************************************//**
+Makes a block sticky. A sticky block implies that even after we release
+the buf_pool->mutex and the block->mutex:
+* it cannot be removed from the flush_list
+* the block descriptor cannot be relocated
+* it cannot be removed from the LRU list
+Note that:
+* the block can still change its position in the LRU list
+* the next and previous pointers can change. */
+UNIV_INLINE
+void
+buf_page_set_sticky(
+/*================*/
+	buf_page_t*	bpage);	/*!< in/out: control block */
+/*********************************************************************//**
+Removes stickiness of a block. */
+UNIV_INLINE
+void
+buf_page_unset_sticky(
+/*==================*/
+	buf_page_t*	bpage);	/*!< in/out: control block */
 /********************************************************************//**
 Determine if a buffer block can be relocated in memory.  The block
 can be dirty, but it must not be I/O-fixed or bufferfixed. */
@@ -1569,13 +1576,16 @@ struct buf_block_struct{
 	/* @} */
 
 	/** @name Hash search fields
-	These 6 fields may only be modified when we have
+	These 5 fields may only be modified when we have
 	an x-latch on btr_search_latch AND
 	- we are holding an s-latch or x-latch on buf_block_struct::lock or
 	- we know that buf_block_struct::buf_fix_count == 0.
 
 	An exception to this is when we init or create a page
-	in the buffer pool in buf0buf.c. */
+	in the buffer pool in buf0buf.c.
+
+	Another exception is that assigning block->index = NULL
+	is allowed whenever holding an x-latch on btr_search_latch. */
 
 	/* @{ */
 
@@ -1584,21 +1594,21 @@ struct buf_block_struct{
 					pointers in the adaptive hash index
 					pointing to this frame */
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-	volatile unsigned	is_hashed:1;	/*!< TRUE if hash index has
-					already been built on this
-					page; note that it does not
-					guarantee that the index is
-					complete, though: there may
-					have been hash collisions,
-					record deletions, etc. */
 	unsigned	curr_n_fields:10;/*!< prefix length for hash indexing:
 					number of full fields */
 	unsigned	curr_n_bytes:15;/*!< number of bytes in hash
 					indexing */
 	unsigned	curr_left_side:1;/*!< TRUE or FALSE in hash indexing */
-	dict_index_t*	index;		/*!< Index for which the adaptive
-					hash index has been created. */
-	volatile rw_lock_t*	btr_search_latch;
+	dict_index_t*	index;		/*!< Index for which the
+					adaptive hash index has been
+					created, or NULL if the page
+					does not exist in the
+					index. Note that it does not
+					guarantee that the index is
+					complete, though: there may
+					have been hash collisions,
+					record deletions, etc. */
+	volatile rw_lock_t*     btr_search_latch;
 	/* @} */
 # ifdef UNIV_SYNC_DEBUG
 	/** @name Debug fields */
diff --git a/storage/xtradb/include/buf0buf.ic b/storage/xtradb/include/buf0buf.ic
index 98d575075ba..55d89b66375 100644
--- a/storage/xtradb/include/buf0buf.ic
+++ b/storage/xtradb/include/buf0buf.ic
@@ -444,6 +444,7 @@ buf_page_get_io_fix(
 	case BUF_IO_NONE:
 	case BUF_IO_READ:
 	case BUF_IO_WRITE:
+	case BUF_IO_PIN:
 		return(io_fix);
 	}
 	ut_error;
@@ -494,6 +495,49 @@ buf_block_set_io_fix(
 	buf_page_set_io_fix(&block->page, io_fix);
 }
 
+/*********************************************************************//**
+Makes a block sticky. A sticky block implies that even after we release
+the buf_pool->mutex and the block->mutex:
+* it cannot be removed from the flush_list
+* the block descriptor cannot be relocated
+* it cannot be removed from the LRU list
+Note that:
+* the block can still change its position in the LRU list
+* the next and previous pointers can change. */
+UNIV_INLINE
+void
+buf_page_set_sticky(
+/*================*/
+	buf_page_t*	bpage)	/*!< in/out: control block */
+{
+#ifdef UNIV_DEBUG
+	buf_pool_t*	buf_pool = buf_pool_from_bpage(bpage);
+	ut_ad(mutex_own(&buf_pool->LRU_list_mutex));
+#endif
+	ut_ad(mutex_own(buf_page_get_mutex(bpage)));
+	ut_ad(buf_page_get_io_fix(bpage) == BUF_IO_NONE);
+
+	bpage->io_fix = BUF_IO_PIN;
+}
+
+/*********************************************************************//**
+Removes stickiness of a block. */
+UNIV_INLINE
+void
+buf_page_unset_sticky(
+/*==================*/
+	buf_page_t*	bpage)	/*!< in/out: control block */
+{
+#ifdef UNIV_DEBUG
+	buf_pool_t*	buf_pool = buf_pool_from_bpage(bpage);
+	ut_ad(mutex_own(&buf_pool->LRU_list_mutex));
+#endif
+	ut_ad(mutex_own(buf_page_get_mutex(bpage)));
+	ut_ad(buf_page_get_io_fix(bpage) == BUF_IO_PIN);
+
+	bpage->io_fix = BUF_IO_NONE;
+}
+
 /********************************************************************//**
 Determine if a buffer block can be relocated in memory.  The block
 can be dirty, but it must not be I/O-fixed or bufferfixed. */
diff --git a/storage/xtradb/include/buf0types.h b/storage/xtradb/include/buf0types.h
index 156093aad01..d140936a886 100644
--- a/storage/xtradb/include/buf0types.h
+++ b/storage/xtradb/include/buf0types.h
@@ -57,7 +57,10 @@ enum buf_flush {
 enum buf_io_fix {
 	BUF_IO_NONE = 0,		/**< no pending I/O */
 	BUF_IO_READ,			/**< read pending */
-	BUF_IO_WRITE			/**< write pending */
+	BUF_IO_WRITE,			/**< write pending */
+	BUF_IO_PIN			/**< disallow relocation of
+					block and its removal of from
+					the flush_list */
 };
 
 /** Parameters of binary buddy system for compressed pages (buf0buddy.h) */
diff --git a/storage/xtradb/include/fil0fil.h b/storage/xtradb/include/fil0fil.h
index 840a9fbb13a..92fdca0db1b 100644
--- a/storage/xtradb/include/fil0fil.h
+++ b/storage/xtradb/include/fil0fil.h
@@ -34,6 +34,7 @@ Created 10/25/1995 Heikki Tuuri
 #include "sync0rw.h"
 #include "ibuf0types.h"
 #endif /* !UNIV_HOTBACKUP */
+#include "trx0types.h"
 
 /** When mysqld is run, the default directory "." is the mysqld datadir,
 but in the MySQL Embedded Server Library and ibbackup it is not the default
@@ -329,18 +330,23 @@ Reads the flushed lsn and arch no fields from a data file at database
 startup. */
 UNIV_INTERN
 void
-fil_read_flushed_lsn_and_arch_log_no(
-/*=================================*/
+fil_read_first_page(
+/*================*/
 	os_file_t	data_file,		/*!< in: open data file */
 	ibool		one_read_already,	/*!< in: TRUE if min and max
 						parameters below already
 						contain sensible data */
+	ulint*		flags,			/*!< out: tablespace flags */
 #ifdef UNIV_LOG_ARCHIVE
-	ulint*		min_arch_log_no,	/*!< in/out: */
-	ulint*		max_arch_log_no,	/*!< in/out: */
+	ulint*		min_arch_log_no,	/*!< out: min of archived
+						log numbers in data files */
+	ulint*		max_arch_log_no,	/*!< out: max of archived
+						log numbers in data files */
 #endif /* UNIV_LOG_ARCHIVE */
-	ib_uint64_t*	min_flushed_lsn,	/*!< in/out: */
-	ib_uint64_t*	max_flushed_lsn);	/*!< in/out: */
+	ib_uint64_t*	min_flushed_lsn,	/*!< out: min of flushed
+						lsn values in data files */
+	ib_uint64_t*	max_flushed_lsn);	/*!< out: max of flushed
+						lsn values in data files */
 /*******************************************************************//**
 Increments the count of pending insert buffer page merges, if space is not
 being deleted.
@@ -474,8 +480,11 @@ fil_open_single_table_tablespace(
 					accessing the first page of the file */
 	ulint		id,		/*!< in: space id */
 	ulint		flags,		/*!< in: tablespace flags */
-	const char*	name);		/*!< in: table name in the
+	const char*	name,		/*!< in: table name in the
 					databasename/tablename format */
+	trx_t*		trx);		/*!< in: transaction. This is only used
+					for IMPORT TABLESPACE, must be NULL
+					otherwise */
 /********************************************************************//**
 It is possible, though very improbable, that the lsn's in the tablespace to be
 imported have risen above the current system lsn, if a lengthy purge, ibuf
diff --git a/storage/xtradb/include/fsp0fsp.h b/storage/xtradb/include/fsp0fsp.h
index 7abd3914eda..d5e235aa870 100644
--- a/storage/xtradb/include/fsp0fsp.h
+++ b/storage/xtradb/include/fsp0fsp.h
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License along with
-this program; if not, write to the Free Software Foundation, Inc., 59 Temple
-Place, Suite 330, Boston, MA 02111-1307 USA
+this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
 
 *****************************************************************************/
 
@@ -34,6 +34,90 @@ Created 12/18/1995 Heikki Tuuri
 #include "page0types.h"
 #include "fsp0types.h"
 
+/* @defgroup fsp_flags InnoDB Tablespace Flag Constants @{ */
+
+/** Number of flag bits used to indicate the tablespace page size */
+#define FSP_FLAGS_WIDTH_PAGE_SSIZE	4
+/** Zero relative shift position of the PAGE_SSIZE field */
+#define FSP_FLAGS_POS_PAGE_SSIZE	6
+/** Bit mask of the PAGE_SSIZE field */
+#define FSP_FLAGS_MASK_PAGE_SSIZE				\
+		((~(~0 << FSP_FLAGS_WIDTH_PAGE_SSIZE))		\
+		<< FSP_FLAGS_POS_PAGE_SSIZE)
+/** Return the value of the PAGE_SSIZE field */
+#define FSP_FLAGS_GET_PAGE_SSIZE(flags)				\
+		((flags & FSP_FLAGS_MASK_PAGE_SSIZE)		\
+		>> FSP_FLAGS_POS_PAGE_SSIZE)
+
+/* @} */
+
+/* @defgroup Tablespace Header Constants (moved from fsp0fsp.c) @{ */
+
+/** Offset of the space header within a file page */
+#define FSP_HEADER_OFFSET	FIL_PAGE_DATA
+
+/* The data structures in files are defined just as byte strings in C */
+typedef	byte	fsp_header_t;
+typedef	byte	xdes_t;
+
+/*			SPACE HEADER
+			============
+
+File space header data structure: this data structure is contained in the
+first page of a space. The space for this header is reserved in every extent
+descriptor page, but used only in the first. */
+
+/*-------------------------------------*/
+#define FSP_SPACE_ID		0	/* space id */
+#define FSP_NOT_USED		4	/* this field contained a value up to
+					which we know that the modifications
+					in the database have been flushed to
+					the file space; not used now */
+#define	FSP_SIZE		8	/* Current size of the space in
+					pages */
+#define	FSP_FREE_LIMIT		12	/* Minimum page number for which the
+					free list has not been initialized:
+					the pages >= this limit are, by
+					definition, free; note that in a
+					single-table tablespace where size
+					< 64 pages, this number is 64, i.e.,
+					we have initialized the space
+					about the first extent, but have not
+					physically allocted those pages to the
+					file */
+#define	FSP_SPACE_FLAGS		16	/* fsp_space_t.flags, similar to
+					dict_table_t::flags */
+#define	FSP_FRAG_N_USED		20	/* number of used pages in the
+					FSP_FREE_FRAG list */
+#define	FSP_FREE		24	/* list of free extents */
+#define	FSP_FREE_FRAG		(24 + FLST_BASE_NODE_SIZE)
+					/* list of partially free extents not
+					belonging to any segment */
+#define	FSP_FULL_FRAG		(24 + 2 * FLST_BASE_NODE_SIZE)
+					/* list of full extents not belonging
+					to any segment */
+#define FSP_SEG_ID		(24 + 3 * FLST_BASE_NODE_SIZE)
+					/* 8 bytes which give the first unused
+					segment id */
+#define FSP_SEG_INODES_FULL	(32 + 3 * FLST_BASE_NODE_SIZE)
+					/* list of pages containing segment
+					headers, where all the segment inode
+					slots are reserved */
+#define FSP_SEG_INODES_FREE	(32 + 4 * FLST_BASE_NODE_SIZE)
+					/* list of pages containing segment
+					headers, where not all the segment
+					header slots are reserved */
+/*-------------------------------------*/
+/* File space header size */
+#define	FSP_HEADER_SIZE		(32 + 5 * FLST_BASE_NODE_SIZE)
+
+#define	FSP_FREE_ADD		4	/* this many free extents are added
+					to the free list from above
+					FSP_FREE_LIMIT at a time */
+/* @} */
+
+/* @} */
+
 /**********************************************************************//**
 Initializes the file space system. */
 UNIV_INTERN
@@ -352,6 +436,18 @@ fseg_print(
 	mtr_t*		mtr);	/*!< in: mtr */
 #endif /* UNIV_BTR_PRINT */
 
+/********************************************************************//**
+Extract the page size from tablespace flags.
+This feature, storing the page_ssize into the tablespace flags, is added
+to InnoDB 5.6.4.  This is here only to protect against a crash if a newer
+database is opened with this code branch.
+@return	page size of the tablespace in bytes */
+UNIV_INLINE
+ulint
+fsp_flags_get_page_size(
+/*====================*/
+	ulint	flags);	/*!< in: tablespace flags */
+
 #ifndef UNIV_NONINL
 #include "fsp0fsp.ic"
 #endif
diff --git a/storage/xtradb/include/fsp0fsp.ic b/storage/xtradb/include/fsp0fsp.ic
index 434c370b527..c92111a9d89 100644
--- a/storage/xtradb/include/fsp0fsp.ic
+++ b/storage/xtradb/include/fsp0fsp.ic
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -11,8 +11,8 @@ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License along with
-this program; if not, write to the Free Software Foundation, Inc., 59 Temple
-Place, Suite 330, Boston, MA 02111-1307 USA
+this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
 
 *****************************************************************************/
 
@@ -43,3 +43,31 @@ fsp_descr_page(
 
 	return(UNIV_UNLIKELY((page_no & (zip_size - 1)) == FSP_XDES_OFFSET));
 }
+/********************************************************************//**
+Extract the page size from tablespace flags.
+This feature, storing the page_ssize into the tablespace flags, is added
+to InnoDB 5.6.4.  This is here only to protect against a crash if a newer
+database is opened with this code branch.
+@return	page size of the tablespace in bytes */
+UNIV_INLINE
+ulint
+fsp_flags_get_page_size(
+/*====================*/
+	ulint	flags)	/*!< in: tablespace flags */
+{
+	ulint	page_size = 0;
+	ulint	ssize = FSP_FLAGS_GET_PAGE_SSIZE(flags);
+
+	/* Convert from a 'log2 minus 9' to a page size in bytes. */
+	if (UNIV_UNLIKELY(ssize)) {
+		page_size = (512 << ssize);
+
+		ut_ad(page_size <= UNIV_PAGE_SIZE);
+	} else {
+		/* If the page size was not stored, then it is the
+		original 16k. */
+		page_size = UNIV_PAGE_SIZE;
+	}
+
+	return(page_size);
+}
diff --git a/storage/xtradb/include/ha0ha.h b/storage/xtradb/include/ha0ha.h
index 3299000bf3c..8bba564d153 100644
--- a/storage/xtradb/include/ha0ha.h
+++ b/storage/xtradb/include/ha0ha.h
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -31,13 +31,14 @@ Created 8/18/1994 Heikki Tuuri
 #include "hash0hash.h"
 #include "page0types.h"
 #include "buf0types.h"
+#include "rem0types.h"
 
 /*************************************************************//**
 Looks for an element in a hash table.
 @return pointer to the data of the first hash table node in chain
 having the fold number, NULL if not found */
 UNIV_INLINE
-void*
+const rec_t*
 ha_search_and_get_data(
 /*===================*/
 	hash_table_t*	table,	/*!< in: hash table */
@@ -51,11 +52,11 @@ ha_search_and_update_if_found_func(
 /*===============================*/
 	hash_table_t*	table,	/*!< in/out: hash table */
 	ulint		fold,	/*!< in: folded value of the searched data */
-	void*		data,	/*!< in: pointer to the data */
+	const rec_t*	data,	/*!< in: pointer to the data */
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	buf_block_t*	new_block,/*!< in: block containing new_data */
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-	void*		new_data);/*!< in: new pointer to the data */
+	const rec_t*	new_data);/*!< in: new pointer to the data */
 
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 /** Looks for an element when we know the pointer to the data and
@@ -113,14 +114,6 @@ chosen to be a slightly bigger prime number.
 # define ha_create(n_c,n_m,level) ha_create_func(n_c,n_m)
 #endif /* UNIV_SYNC_DEBUG */
 
-/*************************************************************//**
-Empties a hash table and frees the memory heaps. */
-UNIV_INTERN
-void
-ha_clear(
-/*=====*/
-	hash_table_t*	table);	/*!< in, own: hash table */
-
 /*************************************************************//**
 Inserts an entry into a hash table. If an entry with the same fold number
 is found, its node is updated to point to the new data, and no new node
@@ -138,7 +131,7 @@ ha_insert_for_fold_func(
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	buf_block_t*	block,	/*!< in: buffer block containing the data */
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-	void*		data);	/*!< in: data, must not be NULL */
+	const rec_t*	data);	/*!< in: data, must not be NULL */
 
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 /**
@@ -174,7 +167,7 @@ ha_search_and_delete_if_found(
 /*==========================*/
 	hash_table_t*	table,	/*!< in: hash table */
 	ulint		fold,	/*!< in: folded value of the searched data */
-	void*		data);	/*!< in: pointer to the data */
+	const rec_t*	data);	/*!< in: pointer to the data */
 #ifndef UNIV_HOTBACKUP
 /*****************************************************************//**
 Removes from the chain determined by fold all nodes whose data pointer
@@ -217,7 +210,7 @@ struct ha_node_struct {
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	buf_block_t*	block;	/*!< buffer block containing the data, or NULL */
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-	void*		data;	/*!< pointer to the data */
+	const rec_t*	data;	/*!< pointer to the data */
 	ulint		fold;	/*!< fold value for the data */
 };
 
diff --git a/storage/xtradb/include/ha0ha.ic b/storage/xtradb/include/ha0ha.ic
index 734403c4cd9..f224776c134 100644
--- a/storage/xtradb/include/ha0ha.ic
+++ b/storage/xtradb/include/ha0ha.ic
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 1994, 2009, Innobase Oy. All Rights Reserved.
+Copyright (c) 1994, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -25,6 +25,7 @@ Created 8/18/1994 Heikki Tuuri
 
 #include "ut0rnd.h"
 #include "mem0mem.h"
+#include "btr0types.h"
 
 /***********************************************************//**
 Deletes a hash node. */
@@ -39,10 +40,10 @@ ha_delete_hash_node(
 Gets a hash node data.
 @return	pointer to the data */
 UNIV_INLINE
-void*
+const rec_t*
 ha_node_get_data(
 /*=============*/
-	ha_node_t*	node)	/*!< in: hash chain node */
+	const ha_node_t*	node)	/*!< in: hash chain node */
 {
 	return(node->data);
 }
@@ -57,7 +58,7 @@ ha_node_set_data_func(
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	buf_block_t*	block,	/*!< in: buffer block containing the data */
 #endif /* UNIV_AHI_DEBUG || UNIV_DEBUG */
-	void*		data)	/*!< in: pointer to the data */
+	const rec_t*	data)	/*!< in: pointer to the data */
 {
 #if defined UNIV_AHI_DEBUG || defined UNIV_DEBUG
 	node->block = block;
@@ -105,41 +106,12 @@ ha_chain_get_first(
 	       hash_get_nth_cell(table, hash_calc_hash(fold, table))->node);
 }
 
-/*************************************************************//**
-Looks for an element in a hash table.
-@return pointer to the first hash table node in chain having the fold
-number, NULL if not found */
-UNIV_INLINE
-ha_node_t*
-ha_search(
-/*======*/
-	hash_table_t*	table,	/*!< in: hash table */
-	ulint		fold)	/*!< in: folded value of the searched data */
-{
-	ha_node_t*	node;
-
-	ASSERT_HASH_MUTEX_OWN(table, fold);
-
-	node = ha_chain_get_first(table, fold);
-
-	while (node) {
-		if (node->fold == fold) {
-
-			return(node);
-		}
-
-		node = ha_chain_get_next(node);
-	}
-
-	return(NULL);
-}
-
 /*************************************************************//**
 Looks for an element in a hash table.
 @return pointer to the data of the first hash table node in chain
 having the fold number, NULL if not found */
 UNIV_INLINE
-void*
+const rec_t*
 ha_search_and_get_data(
 /*===================*/
 	hash_table_t*	table,	/*!< in: hash table */
@@ -148,6 +120,10 @@ ha_search_and_get_data(
 	ha_node_t*	node;
 
 	ASSERT_HASH_MUTEX_OWN(table, fold);
+#ifdef UNIV_SYNC_DEBUG
+//	ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_SHARED));
+#endif /* UNIV_SYNC_DEBUG */
+	ut_ad(btr_search_enabled);
 
 	node = ha_chain_get_first(table, fold);
 
@@ -172,12 +148,14 @@ ha_search_with_data(
 /*================*/
 	hash_table_t*	table,	/*!< in: hash table */
 	ulint		fold,	/*!< in: folded value of the searched data */
-	void*		data)	/*!< in: pointer to the data */
+	const rec_t*	data)	/*!< in: pointer to the data */
 {
 	ha_node_t*	node;
 
 	ASSERT_HASH_MUTEX_OWN(table, fold);
 
+	ut_ad(btr_search_enabled);
+
 	node = ha_chain_get_first(table, fold);
 
 	while (node) {
@@ -202,11 +180,15 @@ ha_search_and_delete_if_found(
 /*==========================*/
 	hash_table_t*	table,	/*!< in: hash table */
 	ulint		fold,	/*!< in: folded value of the searched data */
-	void*		data)	/*!< in: pointer to the data */
+	const rec_t*	data)	/*!< in: pointer to the data */
 {
 	ha_node_t*	node;
 
 	ASSERT_HASH_MUTEX_OWN(table, fold);
+#ifdef UNIV_SYNC_DEBUG
+//	ut_ad(rw_lock_own(&btr_search_latch, RW_LOCK_EX));
+#endif /* UNIV_SYNC_DEBUG */
+	ut_ad(btr_search_enabled);
 
 	node = ha_search_with_data(table, fold, data);
 
diff --git a/storage/xtradb/include/page0page.h b/storage/xtradb/include/page0page.h
index c1c659e2b70..1b9f9c84225 100644
--- a/storage/xtradb/include/page0page.h
+++ b/storage/xtradb/include/page0page.h
@@ -893,6 +893,7 @@ page_parse_create(
 	ulint		comp,	/*!< in: nonzero=compact page format */
 	buf_block_t*	block,	/*!< in: block or NULL */
 	mtr_t*		mtr);	/*!< in: mtr or NULL */
+#ifndef UNIV_HOTBACKUP
 /************************************************************//**
 Prints record contents including the data relevant only in
 the index page context. */
@@ -902,6 +903,7 @@ page_rec_print(
 /*===========*/
 	const rec_t*	rec,	/*!< in: physical record */
 	const ulint*	offsets);/*!< in: record descriptor */
+# ifdef UNIV_BTR_PRINT
 /***************************************************************//**
 This is used to print the contents of the directory for
 debugging purposes. */
@@ -941,6 +943,8 @@ page_print(
 				in directory */
 	ulint		rn);	/*!< in: print rn first and last records
 				in directory */
+# endif /* UNIV_BTR_PRINT */
+#endif /* !UNIV_HOTBACKUP */
 /***************************************************************//**
 The following is used to validate a record on a page. This function
 differs from rec_validate as it can also check the n_owned field and
diff --git a/storage/xtradb/include/row0upd.ic b/storage/xtradb/include/row0upd.ic
index 11db82f64da..10646241125 100644
--- a/storage/xtradb/include/row0upd.ic
+++ b/storage/xtradb/include/row0upd.ic
@@ -28,7 +28,6 @@ Created 12/27/1996 Heikki Tuuri
 # include "trx0trx.h"
 # include "trx0undo.h"
 # include "row0row.h"
-# include "btr0sea.h"
 #endif /* !UNIV_HOTBACKUP */
 #include "page0zip.h"
 
diff --git a/storage/xtradb/include/srv0srv.h b/storage/xtradb/include/srv0srv.h
index 6f985eacdf3..b660f7ea104 100644
--- a/storage/xtradb/include/srv0srv.h
+++ b/storage/xtradb/include/srv0srv.h
@@ -243,7 +243,7 @@ extern long long	srv_ibuf_max_size;
 extern ulong	srv_ibuf_active_contract;
 extern ulong	srv_ibuf_accel_rate;
 extern ulint	srv_checkpoint_age_target;
-extern ulint	srv_flush_neighbor_pages;
+extern ulong	srv_flush_neighbor_pages;
 extern ulint	srv_deprecated_enable_unsafe_group_commit;
 extern ulong	srv_read_ahead;
 extern ulong	srv_adaptive_flushing_method;
@@ -288,6 +288,9 @@ extern	ibool	srv_print_lock_waits;
 extern	ibool	srv_print_buf_io;
 extern	ibool	srv_print_log_io;
 extern	ibool	srv_print_latch_waits;
+
+extern	ulong	srv_flush_checkpoint_debug;
+
 #else /* UNIV_DEBUG */
 # define srv_print_thread_releases	FALSE
 # define srv_print_lock_waits		FALSE
diff --git a/storage/xtradb/include/sync0rw.h b/storage/xtradb/include/sync0rw.h
index 6420bc5d3bf..971099c91f5 100644
--- a/storage/xtradb/include/sync0rw.h
+++ b/storage/xtradb/include/sync0rw.h
@@ -543,7 +543,7 @@ mutex. */
 UNIV_INTERN
 void
 rw_lock_debug_mutex_enter(void);
-/*==========================*/
+/*===========================*/
 /******************************************************************//**
 Releases the debug mutex. */
 UNIV_INTERN
@@ -634,7 +634,8 @@ struct rw_lock_struct {
 };
 
 #ifdef UNIV_SYNC_DEBUG
-/** The structure for storing debug info of an rw-lock */
+/** The structure for storing debug info of an rw-lock.  All access to this
+structure must be protected by rw_lock_debug_mutex_enter(). */
 struct	rw_lock_debug_struct {
 
 	os_thread_id_t thread_id;  /*!< The thread id of the thread which
diff --git a/storage/xtradb/include/sync0rw.ic b/storage/xtradb/include/sync0rw.ic
index a6dfa603c59..3eaa6172631 100644
--- a/storage/xtradb/include/sync0rw.ic
+++ b/storage/xtradb/include/sync0rw.ic
@@ -406,6 +406,7 @@ rw_lock_s_lock_func(
 
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(!rw_lock_own(lock, RW_LOCK_SHARED)); /* see NOTE above */
+	ut_ad(!rw_lock_own(lock, RW_LOCK_EX));
 #endif /* UNIV_SYNC_DEBUG */
 
 	/* TODO: study performance of UNIV_LIKELY branch prediction hints. */
diff --git a/storage/xtradb/include/sync0sync.h b/storage/xtradb/include/sync0sync.h
index 6440a670f14..f9434ed54be 100644
--- a/storage/xtradb/include/sync0sync.h
+++ b/storage/xtradb/include/sync0sync.h
@@ -674,7 +674,6 @@ or row lock! */
 #define SYNC_LOG_FLUSH_ORDER	156
 #define SYNC_RECV		168
 #define	SYNC_WORK_QUEUE		162
-#define	SYNC_SEARCH_SYS_CONF	161	/* for assigning btr_search_enabled */
 #define	SYNC_SEARCH_SYS		160	/* NOTE that if we have a memory
 					heap that can be extended to the
 					buffer pool, its logical level is
diff --git a/storage/xtradb/include/trx0trx.h b/storage/xtradb/include/trx0trx.h
index a03f7aceafa..eded5c303fa 100644
--- a/storage/xtradb/include/trx0trx.h
+++ b/storage/xtradb/include/trx0trx.h
@@ -494,6 +494,7 @@ struct trx_struct{
 					this is set to 1 then registered should
 					also be set to 1. This is used in the
 					XA code */
+	unsigned	called_commit_ordered:1;/* 1 if innobase_commit_ordered has run. */
 	/*------------------------------*/
 	ulint		isolation_level;/* TRX_ISO_REPEATABLE_READ, ... */
 	ulint		check_foreigns;	/* normally TRUE, but if the user
diff --git a/storage/xtradb/include/univ.i b/storage/xtradb/include/univ.i
index 0287ea40509..1a48d68d0d7 100644
--- a/storage/xtradb/include/univ.i
+++ b/storage/xtradb/include/univ.i
@@ -54,7 +54,7 @@ Created 1/20/1994 Heikki Tuuri
 #define INNODB_VERSION_BUGFIX	8
 
 #ifndef PERCONA_INNODB_VERSION
-#define PERCONA_INNODB_VERSION 20.1
+#define PERCONA_INNODB_VERSION 24.1
 #endif
 
 /* The following is the InnoDB version as shown in
diff --git a/storage/xtradb/log/log0log.c b/storage/xtradb/log/log0log.c
index d9676707cfd..af0c801a4ec 100644
--- a/storage/xtradb/log/log0log.c
+++ b/storage/xtradb/log/log0log.c
@@ -1693,10 +1693,13 @@ log_preflush_pool_modified_pages(
 		recv_apply_hashed_log_recs(TRUE);
 	}
 
+ retry:
 	n_pages = buf_flush_list(ULINT_MAX, new_oldest);
 
-	if (sync) {
-		buf_flush_wait_batch_end(NULL, BUF_FLUSH_LIST);
+	if (sync && n_pages != 0) {
+		//buf_flush_wait_batch_end(NULL, BUF_FLUSH_LIST);
+		os_thread_sleep(100000);
+		goto retry;
 	}
 
 	if (n_pages == ULINT_UNDEFINED) {
@@ -2020,6 +2023,13 @@ log_checkpoint(
 {
 	ib_uint64_t	oldest_lsn;
 
+#ifdef UNIV_DEBUG
+	if (srv_flush_checkpoint_debug == 1) {
+
+		return TRUE;
+	}
+#endif
+
 	if (recv_recovery_is_on()) {
 		recv_apply_hashed_log_recs(TRUE);
 	}
@@ -2124,7 +2134,11 @@ log_make_checkpoint_at(
 					physical write will always be made to
 					log files */
 {
-	/* Preflush pages synchronously */
+#ifdef UNIV_DEBUG
+	if (srv_flush_checkpoint_debug == 1)
+		return;
+#endif
+/* Preflush pages synchronously */
 
 	while (!log_preflush_pool_modified_pages(lsn, TRUE));
 
@@ -2216,7 +2230,13 @@ log_checkpoint_margin(void)
 	ibool		checkpoint_sync;
 	ibool		do_checkpoint;
 	ibool		success;
-loop:
+
+#ifdef UNIV_DEBUG
+	if (srv_flush_checkpoint_debug == 1)
+		return;
+#endif
+
+ loop:
 	sync = FALSE;
 	checkpoint_sync = FALSE;
 	do_checkpoint = FALSE;
@@ -2239,13 +2259,15 @@ loop:
 		/* A flush is urgent: we have to do a synchronous preflush */
 
 		sync = TRUE;
-		advance = 2 * (age - log->max_modified_age_sync);
+		advance = age - log->max_modified_age_sync;
 	} else if (age > log_max_modified_age_async()) {
 
 		/* A flush is not urgent: we do an asynchronous preflush */
 		advance = age - log_max_modified_age_async();
+		log->check_flush_or_checkpoint = FALSE;
 	} else {
 		advance = 0;
+		log->check_flush_or_checkpoint = FALSE;
 	}
 
 	checkpoint_age = log->lsn - log->last_checkpoint_lsn;
@@ -2262,9 +2284,9 @@ loop:
 
 		do_checkpoint = TRUE;
 
-		log->check_flush_or_checkpoint = FALSE;
+		//log->check_flush_or_checkpoint = FALSE;
 	} else {
-		log->check_flush_or_checkpoint = FALSE;
+		//log->check_flush_or_checkpoint = FALSE;
 	}
 
 	mutex_exit(&(log->mutex));
@@ -2272,6 +2294,7 @@ loop:
 	if (advance) {
 		ib_uint64_t	new_oldest = oldest_lsn + advance;
 
+retry:
 		success = log_preflush_pool_modified_pages(new_oldest, sync);
 
 		/* If the flush succeeded, this thread has done its part
@@ -2286,7 +2309,7 @@ loop:
 			log->check_flush_or_checkpoint = TRUE;
 
 			mutex_exit(&(log->mutex));
-			goto loop;
+			goto retry;
 		}
 	}
 
@@ -3164,7 +3187,11 @@ void
 log_check_margins(void)
 /*===================*/
 {
-loop:
+#ifdef UNIV_DEBUG
+	if (srv_flush_checkpoint_debug == 1)
+		return;
+#endif
+ loop:
 	log_flush_margin();
 
 	log_checkpoint_margin();
diff --git a/storage/xtradb/page/page0page.c b/storage/xtradb/page/page0page.c
index 17f6c6bbc36..4858929082a 100644
--- a/storage/xtradb/page/page0page.c
+++ b/storage/xtradb/page/page0page.c
@@ -215,12 +215,6 @@ page_set_max_trx_id(
 {
 	page_t*		page		= buf_block_get_frame(block);
 #ifndef UNIV_HOTBACKUP
-	const ibool	is_hashed	= block->is_hashed;
-
-	if (is_hashed) {
-		rw_lock_x_lock(btr_search_get_latch(block->index->id));
-	}
-
 	ut_ad(!mtr || mtr_memo_contains(mtr, block, MTR_MEMO_PAGE_X_FIX));
 #endif /* !UNIV_HOTBACKUP */
 
@@ -241,12 +235,6 @@ page_set_max_trx_id(
 	} else {
 		mach_write_to_8(page + (PAGE_HEADER + PAGE_MAX_TRX_ID), trx_id);
 	}
-
-#ifndef UNIV_HOTBACKUP
-	if (is_hashed) {
-		rw_lock_x_unlock(btr_search_get_latch(block->index->id));
-	}
-#endif /* !UNIV_HOTBACKUP */
 }
 
 /************************************************************//**
@@ -1603,13 +1591,14 @@ page_rec_print(
 			" n_owned: %lu; heap_no: %lu; next rec: %lu\n",
 			(ulong) rec_get_n_owned_old(rec),
 			(ulong) rec_get_heap_no_old(rec),
-			(ulong) rec_get_next_offs(rec, TRUE));
+			(ulong) rec_get_next_offs(rec, FALSE));
 	}
 
 	page_rec_check(rec);
 	rec_validate(rec, offsets);
 }
 
+# ifdef UNIV_BTR_PRINT
 /***************************************************************//**
 This is used to print the contents of the directory for
 debugging purposes. */
@@ -1770,6 +1759,7 @@ page_print(
 	page_dir_print(page, dn);
 	page_print_list(block, index, rn);
 }
+# endif /* UNIV_BTR_PRINT */
 #endif /* !UNIV_HOTBACKUP */
 
 /***************************************************************//**
diff --git a/storage/xtradb/page/page0zip.c b/storage/xtradb/page/page0zip.c
index fc9f30ed94e..d4b0dd8339d 100644
--- a/storage/xtradb/page/page0zip.c
+++ b/storage/xtradb/page/page0zip.c
@@ -4456,7 +4456,7 @@ page_zip_reorganize(
 
 #ifndef UNIV_HOTBACKUP
 	temp_block = buf_block_alloc(buf_pool);
-	btr_search_drop_page_hash_index(block, index);
+	btr_search_drop_page_hash_index(block);
 	block->check_index_page_at_flush = TRUE;
 #else /* !UNIV_HOTBACKUP */
 	ut_ad(block == back_block1);
diff --git a/storage/xtradb/row/row0ins.c b/storage/xtradb/row/row0ins.c
index 9bda27e4b1f..adc75bd5760 100644
--- a/storage/xtradb/row/row0ins.c
+++ b/storage/xtradb/row/row0ins.c
@@ -437,11 +437,9 @@ row_ins_cascade_calc_update_vec(
 	dict_table_t*	table		= foreign->foreign_table;
 	dict_index_t*	index		= foreign->foreign_index;
 	upd_t*		update;
-	upd_field_t*	ufield;
 	dict_table_t*	parent_table;
 	dict_index_t*	parent_index;
 	upd_t*		parent_update;
-	upd_field_t*	parent_ufield;
 	ulint		n_fields_updated;
 	ulint		parent_field_no;
 	ulint		i;
@@ -477,13 +475,15 @@ row_ins_cascade_calc_update_vec(
 			dict_index_get_nth_col_no(parent_index, i));
 
 		for (j = 0; j < parent_update->n_fields; j++) {
-			parent_ufield = parent_update->fields + j;
+			const upd_field_t*	parent_ufield
+				= &parent_update->fields[j];
 
 			if (parent_ufield->field_no == parent_field_no) {
 
 				ulint			min_size;
 				const dict_col_t*	col;
 				ulint			ufield_len;
+				upd_field_t*		ufield;
 
 				col = dict_index_get_nth_col(index, i);
 
@@ -985,10 +985,9 @@ row_ins_foreign_check_on_constraint(
 		goto nonstandard_exit_func;
 	}
 
-	if ((node->is_delete
-	     && (foreign->type & DICT_FOREIGN_ON_DELETE_SET_NULL))
-	    || (!node->is_delete
-		&& (foreign->type & DICT_FOREIGN_ON_UPDATE_SET_NULL))) {
+	if (node->is_delete
+	    ? (foreign->type & DICT_FOREIGN_ON_DELETE_SET_NULL)
+	    : (foreign->type & DICT_FOREIGN_ON_UPDATE_SET_NULL)) {
 
 		/* Build the appropriate update vector which sets
 		foreign->n_fields first fields in rec to SQL NULL */
@@ -997,6 +996,8 @@ row_ins_foreign_check_on_constraint(
 
 		update->info_bits = 0;
 		update->n_fields = foreign->n_fields;
+		UNIV_MEM_INVALID(update->fields,
+				 update->n_fields * sizeof *update->fields);
 
 		for (i = 0; i < foreign->n_fields; i++) {
 			upd_field_t*	ufield = &update->fields[i];
@@ -1665,7 +1666,7 @@ row_ins_scan_sec_index_for_duplicate(
 	ulint		n_fields_cmp;
 	btr_pcur_t	pcur;
 	ulint		err		= DB_SUCCESS;
-	unsigned	allow_duplicates;
+	ulint		allow_duplicates;
 	mtr_t		mtr;
 	mem_heap_t*	heap		= NULL;
 	ulint		offsets_[REC_OFFS_NORMAL_SIZE];
@@ -1696,7 +1697,7 @@ row_ins_scan_sec_index_for_duplicate(
 
 	btr_pcur_open(index, entry, PAGE_CUR_GE, BTR_SEARCH_LEAF, &pcur, &mtr);
 
-	allow_duplicates = thr_get_trx(thr)->duplicates & TRX_DUP_IGNORE;
+	allow_duplicates = thr_get_trx(thr)->duplicates;
 
 	/* Scan index records and check if there is a duplicate */
 
@@ -1830,7 +1831,7 @@ row_ins_duplicate_error_in_clust(
 			sure that in roll-forward we get the same duplicate
 			errors as in original execution */
 
-			if (trx->duplicates & TRX_DUP_IGNORE) {
+			if (trx->duplicates) {
 
 				/* If the SQL-query will update or replace
 				duplicate key we will take X-lock for
@@ -1874,7 +1875,7 @@ row_ins_duplicate_error_in_clust(
 			offsets = rec_get_offsets(rec, cursor->index, offsets,
 						  ULINT_UNDEFINED, &heap);
 
-			if (trx->duplicates & TRX_DUP_IGNORE) {
+			if (trx->duplicates) {
 
 				/* If the SQL-query will update or replace
 				duplicate key we will take X-lock for
diff --git a/storage/xtradb/row/row0mysql.c b/storage/xtradb/row/row0mysql.c
index ac424ded6cb..63252ed01b3 100644
--- a/storage/xtradb/row/row0mysql.c
+++ b/storage/xtradb/row/row0mysql.c
@@ -1,6 +1,6 @@
 /*****************************************************************************
 
-Copyright (c) 2000, 2010, Innobase Oy. All Rights Reserved.
+Copyright (c) 2000, 2011, Oracle and/or its affiliates. All Rights Reserved.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -291,21 +291,21 @@ row_mysql_pad_col(
 		/* space=0x0020 */
 		pad_end = pad + len;
 		ut_a(!(len % 2));
-		do {
+		while (pad < pad_end) {
 			*pad++ = 0x00;
 			*pad++ = 0x20;
-		} while (pad < pad_end);
+		};
 		break;
 	case 4:
 		/* space=0x00000020 */
 		pad_end = pad + len;
 		ut_a(!(len % 4));
-		do {
+		while (pad < pad_end) {
 			*pad++ = 0x00;
 			*pad++ = 0x00;
 			*pad++ = 0x00;
 			*pad++ = 0x20;
-		} while (pad < pad_end);
+		}
 		break;
 	}
 }
@@ -2736,7 +2736,7 @@ row_import_tablespace_for_mysql(
 	success = fil_open_single_table_tablespace(
 		TRUE, table->space,
 		table->flags == DICT_TF_COMPACT ? 0 : table->flags,
-		table->name);
+		table->name, trx);
 	if (success) {
 		table->ibd_file_missing = FALSE;
 		table->tablespace_discarded = FALSE;
@@ -4119,6 +4119,7 @@ end:
 			trx->error_state = DB_SUCCESS;
 			trx_general_rollback_for_mysql(trx, NULL);
 			trx->error_state = DB_SUCCESS;
+			err = DB_ERROR;
 			goto funct_exit;
 		}
 
diff --git a/storage/xtradb/row/row0sel.c b/storage/xtradb/row/row0sel.c
index c7308ccb765..07608389d9a 100644
--- a/storage/xtradb/row/row0sel.c
+++ b/storage/xtradb/row/row0sel.c
@@ -3263,16 +3263,15 @@ row_sel_pop_cached_row_for_mysql(
 }
 
 /********************************************************************//**
-Pushes a row for MySQL to the fetch cache.
-@return TRUE on success, FALSE if the record contains incomplete BLOBs */
-UNIV_INLINE __attribute__((warn_unused_result))
-ibool
-row_sel_push_cache_row_for_mysql(
-/*=============================*/
-	byte*		mysql_rec,	/*!< in/out: MySQL record */
+Get the last fetch cache buffer from the queue.
+@return pointer to buffer. */
+UNIV_INLINE
+byte*
+row_sel_fetch_last_buf(
+/*===================*/
 	row_prebuilt_t*	prebuilt)	/*!< in/out: prebuilt struct */
 {
-	ut_ad(prebuilt->n_fetch_cached < MYSQL_FETCH_CACHE_SIZE);
+        ut_a(prebuilt->n_fetch_cached < MYSQL_FETCH_CACHE_SIZE);
 	ut_a(!prebuilt->templ_contains_blob);
 
 	if (UNIV_UNLIKELY(prebuilt->fetch_cache[0] == NULL)) {
@@ -3301,15 +3300,28 @@ row_sel_push_cache_row_for_mysql(
 	UNIV_MEM_INVALID(prebuilt->fetch_cache[prebuilt->n_fetch_cached],
 			 prebuilt->mysql_row_len);
 
-	memcpy(prebuilt->fetch_cache[prebuilt->n_fetch_cached],
-	       mysql_rec, prebuilt->mysql_row_len);
+	return(prebuilt->fetch_cache[prebuilt->n_fetch_cached]);
+}
 
-	if (++prebuilt->n_fetch_cached < MYSQL_FETCH_CACHE_SIZE) {
-		return(FALSE);
+/********************************************************************//**
+Pushes a row for MySQL to the fetch cache. */
+UNIV_INLINE 
+void
+row_sel_push_cache_row_for_mysql(
+/*=============================*/
+	byte*		mysql_rec,	/*!< in/out: MySQL record */
+	row_prebuilt_t*	prebuilt)	/*!< in/out: prebuilt struct */
+{
+	/* For non ICP code path the row should already exist in the
+	next fetch cache slot. */
+
+	if (prebuilt->idx_cond != NULL) {
+		byte*	dest = row_sel_fetch_last_buf(prebuilt);
+
+		ut_memcpy(dest, mysql_rec, prebuilt->mysql_row_len);
 	}
 
-	row_sel_pop_cached_row_for_mysql(mysql_rec, prebuilt);
-	return(TRUE);
+        ++prebuilt->n_fetch_cached;
 }
 
 /*********************************************************************//**
@@ -3459,6 +3471,7 @@ row_search_idx_cond_check(
 	}
 
 	ut_error;
+	return(ICP_ABORTED_BY_USER); /* Keep compiler happy */
 }
 
 /********************************************************************//**
@@ -4735,9 +4748,16 @@ requires_clust_rec:
 		not cache rows because there the cursor is a scrollable
 		cursor. */
 
+                ut_a(prebuilt->n_fetch_cached < MYSQL_FETCH_CACHE_SIZE);
+
+                /* We only convert from InnoDB row format to MySQL row
+                format when ICP is disabled. */
+
 		if (!prebuilt->idx_cond
-		    && !row_sel_store_mysql_rec(buf, prebuilt, result_rec,
-						result_rec != rec, offsets)) {
+		    && !row_sel_store_mysql_rec(
+                            row_sel_fetch_last_buf(prebuilt),
+                            prebuilt, result_rec,
+			    result_rec != rec, offsets)) {
 			/* Only fresh inserts may contain incomplete
 			externally stored columns. Pretend that such
 			records do not exist. Such records may only be
@@ -4746,8 +4766,12 @@ requires_clust_rec:
 			transaction. Rollback happens at a lower
 			level, not here. */
 			goto next_rec;
-		} else if (row_sel_push_cache_row_for_mysql(buf, prebuilt)) {
-			goto next_rec;
+		}
+
+                row_sel_push_cache_row_for_mysql(buf, prebuilt);
+
+                if (prebuilt->n_fetch_cached < MYSQL_FETCH_CACHE_SIZE) {
+                        goto next_rec;
 		}
 	} else {
 		if (UNIV_UNLIKELY
diff --git a/storage/xtradb/srv/srv0srv.c b/storage/xtradb/srv/srv0srv.c
index 0c07d75b39a..3476743a692 100644
--- a/storage/xtradb/srv/srv0srv.c
+++ b/storage/xtradb/srv/srv0srv.c
@@ -446,7 +446,7 @@ UNIV_INTERN ulong	srv_ibuf_accel_rate = 100;
 #define PCT_IBUF_IO(pct) ((ulint) (srv_io_capacity * srv_ibuf_accel_rate * ((double) pct / 10000.0)))
 
 UNIV_INTERN ulint	srv_checkpoint_age_target = 0;
-UNIV_INTERN ulint	srv_flush_neighbor_pages = 1; /* 0:disable 1:enable */
+UNIV_INTERN ulong	srv_flush_neighbor_pages = 1; /* 0:disable 1:area 2:contiguous */
 
 UNIV_INTERN ulint	srv_deprecated_enable_unsafe_group_commit = 0;
 UNIV_INTERN ulong	srv_read_ahead = 3; /* 1: random  2: linear  3: Both */
@@ -471,6 +471,9 @@ UNIV_INTERN ibool	srv_print_lock_waits		= FALSE;
 UNIV_INTERN ibool	srv_print_buf_io		= FALSE;
 UNIV_INTERN ibool	srv_print_log_io		= FALSE;
 UNIV_INTERN ibool	srv_print_latch_waits		= FALSE;
+
+UNIV_INTERN ulong	srv_flush_checkpoint_debug = 0;
+
 #endif /* UNIV_DEBUG */
 
 UNIV_INTERN ulint		srv_n_rows_inserted		= 0;
@@ -1253,7 +1256,7 @@ retry:
 static void
 srv_conc_exit_innodb_timer_based(trx_t* trx)
 {
-        (void) os_atomic_increment_lint(&srv_conc_n_threads, -1);
+	(void) os_atomic_increment_lint(&srv_conc_n_threads, -1);
 	trx->declared_to_be_inside_innodb = FALSE;
 	trx->n_tickets_to_enter_innodb = 0;
 	return;
@@ -1475,7 +1478,7 @@ srv_conc_force_enter_innodb(
 	ut_ad(srv_conc_n_threads >= 0);
 #ifdef HAVE_ATOMIC_BUILTINS
 	if (srv_thread_concurrency_timer_based) {
-                (void) os_atomic_increment_lint(&srv_conc_n_threads, 1);
+		(void) os_atomic_increment_lint(&srv_conc_n_threads, 1);
 		trx->declared_to_be_inside_innodb = TRUE;
 		trx->n_tickets_to_enter_innodb = 1;
 		return;
@@ -3625,11 +3628,18 @@ retry_flush_batch:
 			  PCT_IO(10), IB_ULONGLONG_MAX);
 	}
 
-	srv_main_thread_op_info = "making checkpoint";
+#ifdef UNIV_DEBUG
+	if (srv_flush_checkpoint_debug != 1) {
+#endif
 
-	/* Make a new checkpoint about once in 10 seconds */
+		srv_main_thread_op_info = "making checkpoint";
 
-	log_checkpoint(TRUE, FALSE, TRUE);
+		/* Make a new checkpoint about once in 10 seconds */
+
+		log_checkpoint(TRUE, FALSE, TRUE);
+#ifdef UNIV_DEBUG
+	}
+#endif
 
 	srv_main_thread_op_info = "reserving kernel mutex";
 
@@ -3708,6 +3718,10 @@ background_loop:
 	}
 	mutex_exit(&kernel_mutex);
 
+#ifdef UNIV_DEBUG
+	if (srv_flush_checkpoint_debug == 1)
+		goto skip_flush;
+#endif
 flush_loop:
 	srv_main_thread_op_info = "flushing buffer pool pages";
 	srv_main_flush_loops++;
@@ -3748,6 +3762,9 @@ flush_loop:
 		goto flush_loop;
 	}
 
+#ifdef UNIV_DEBUG
+skip_flush:
+#endif
 	srv_main_thread_op_info = "reserving kernel mutex";
 
 	mutex_enter(&kernel_mutex);
diff --git a/storage/xtradb/srv/srv0start.c b/storage/xtradb/srv/srv0start.c
index 4083eb75b83..99916610c21 100644
--- a/storage/xtradb/srv/srv0start.c
+++ b/storage/xtradb/srv/srv0start.c
@@ -735,6 +735,7 @@ open_or_create_data_files(
 	ibool	one_created	= FALSE;
 	ulint	size;
 	ulint	size_high;
+	ulint	flags;
 	ulint	rounded_size_pages;
 	char	name[10000];
 
@@ -917,12 +918,31 @@ open_or_create_data_files(
 				return(DB_ERROR);
 			}
 skip_size_check:
-			fil_read_flushed_lsn_and_arch_log_no(
-				files[i], one_opened,
+			fil_read_first_page(
+				files[i], one_opened, &flags,
 #ifdef UNIV_LOG_ARCHIVE
 				min_arch_log_no, max_arch_log_no,
 #endif /* UNIV_LOG_ARCHIVE */
 				min_flushed_lsn, max_flushed_lsn);
+
+			if (UNIV_PAGE_SIZE
+			    != fsp_flags_get_page_size(flags)) {
+
+				ut_print_timestamp(stderr);
+				fprintf(stderr,
+					" InnoDB: Error: data file %s"
+					" uses page size %lu,\n",
+					name,
+					fsp_flags_get_page_size(flags));
+				ut_print_timestamp(stderr);
+				fprintf(stderr,
+					" InnoDB: but the only supported"
+					" page size in this release is=%lu\n",
+					(ulong) UNIV_PAGE_SIZE);
+
+				return(DB_ERROR);
+			}
+
 			one_opened = TRUE;
 		} else {
 			/* We created the data file and now write it full of
@@ -1060,8 +1080,8 @@ skip_size_check:
 					(ulong) TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * 9);
 			}
 
-			fil_read_flushed_lsn_and_arch_log_no(
-				files[i], one_opened,
+			fil_read_first_page(
+				files[i], one_opened, &flags,
 #ifdef UNIV_LOG_ARCHIVE
 				min_arch_log_no, max_arch_log_no,
 #endif /* UNIV_LOG_ARCHIVE */
diff --git a/storage/xtradb/sync/sync0rw.c b/storage/xtradb/sync/sync0rw.c
index e561ae319a5..8884812d84d 100644
--- a/storage/xtradb/sync/sync0rw.c
+++ b/storage/xtradb/sync/sync0rw.c
@@ -623,6 +623,9 @@ rw_lock_x_lock_func(
 	ibool	spinning = FALSE;
 
 	ut_ad(rw_lock_validate(lock));
+#ifdef UNIV_SYNC_DEBUG
+	ut_ad(!rw_lock_own(lock, RW_LOCK_SHARED));
+#endif /* UNIV_SYNC_DEBUG */
 
 	i = 0;
 
@@ -710,7 +713,7 @@ mutex. */
 UNIV_INTERN
 void
 rw_lock_debug_mutex_enter(void)
-/*==========================*/
+/*===========================*/
 {
 loop:
 	if (0 == mutex_enter_nowait(&rw_lock_debug_mutex)) {
@@ -937,11 +940,13 @@ rw_lock_list_print_info(
 				putc('\n', file);
 			}
 
+			rw_lock_debug_mutex_enter();
 			info = UT_LIST_GET_FIRST(lock->debug_list);
 			while (info != NULL) {
 				rw_lock_debug_print(file, info);
 				info = UT_LIST_GET_NEXT(list, info);
 			}
+			rw_lock_debug_mutex_exit();
 		}
 #ifndef INNODB_RW_LOCKS_USE_ATOMICS
 		mutex_exit(&(lock->mutex));
@@ -985,11 +990,13 @@ rw_lock_print(
 			putc('\n', stderr);
 		}
 
+		rw_lock_debug_mutex_enter();
 		info = UT_LIST_GET_FIRST(lock->debug_list);
 		while (info != NULL) {
 			rw_lock_debug_print(stderr, info);
 			info = UT_LIST_GET_NEXT(list, info);
 		}
+		rw_lock_debug_mutex_exit();
 	}
 }
 
diff --git a/storage/xtradb/sync/sync0sync.c b/storage/xtradb/sync/sync0sync.c
index b38e2183b0f..d2c4617d65c 100644
--- a/storage/xtradb/sync/sync0sync.c
+++ b/storage/xtradb/sync/sync0sync.c
@@ -1222,7 +1222,6 @@ sync_thread_add_level(
 	case SYNC_OUTER_ANY_LATCH:
 	case SYNC_FILE_FORMAT_TAG:
 	case SYNC_DOUBLEWRITE:
-	case SYNC_SEARCH_SYS_CONF:
 	case SYNC_TRX_LOCK_HEAP:
 	case SYNC_KERNEL:
 	case SYNC_IBUF_BITMAP_MUTEX:
diff --git a/win/packaging/heidisql.cmake b/win/packaging/heidisql.cmake
index 94a287cba08..f826c9a6633 100644
--- a/win/packaging/heidisql.cmake
+++ b/win/packaging/heidisql.cmake
@@ -1,4 +1,4 @@
-SET(HEIDISQL_BASE_NAME "HeidiSQL_6.0_Portable")
+SET(HEIDISQL_BASE_NAME "HeidiSQL_7.0_Portable")
 SET(HEIDISQL_ZIP "${HEIDISQL_BASE_NAME}.zip")
 SET(HEIDISQL_URL "http://heidisql.googlecode.com/files/${HEIDISQL_ZIP}")
 SET(HEIDISQL_DOWNLOAD_DIR ${THIRD_PARTY_DOWNLOAD_LOCATION}/${HEIDISQL_BASE_NAME})