merge

sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/opt_sum.cc:
  Auto merged
sql/sp.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_delete.cc:
  Auto merged
sql/sql_help.cc:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_load.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_view.h:
  Auto merged
sql/sql_yacc.yy:
  Auto merged

mysql-test/t/view.test

@@ -1599,3 +1599,120 @@ check table v1,t1;
 drop table t1;
 check table v1;
 drop view v1;
+
+#
+# merge of VIEW with several tables
+#
+create table t1 (a int);
+create table t2 (a int);
+create table t3 (a int);
+insert into t1 values (1), (2), (3);
+insert into t2 values (1), (3);
+insert into t3 values (1), (2), (4);
+# view over tables
+create view v3 (a,b) as select t1.a as a, t2.a as b from t1 left join t2 on (t1.a=t2.a);
+select * from t3 left join v3 on (t3.a = v3.a);
+explain extended select * from t3 left join v3 on (t3.a = v3.a);
+# view over views
+create view v1 (a) as select a from t1;
+create view v2 (a) as select a from t2;
+create view v4 (a,b) as select v1.a as a, v2.a as b from v1 left join v2 on (v1.a=v2.a);
+select * from t3 left join v4 on (t3.a = v4.a);
+explain extended select * from t3 left join v4 on (t3.a = v4.a);
+# PS with view over views
+prepare stmt1 from "select * from t3 left join v4 on (t3.a = v4.a);";
+execute stmt1;
+execute stmt1;
+deallocate prepare stmt1;
+drop view v4,v3,v2,v1;
+drop tables t1,t2,t3;
+
+#
+# updating of join view
+#
+create table t1 (a int, primary key (a), b int);
+create table t2 (a int, primary key (a));
+insert into t1 values (1,100), (2,200);
+insert into t2 values (1), (3);
+# legal view for update
+create view v3 (a,b) as select t1.a as a, t2.a as b from t1, t2;
+update v3 set a= 10 where a=1;
+select * from t1;
+select * from t2;
+# view without primary key
+create view v2 (a,b) as select t1.b as a, t2.a as b from t1, t2;
+-- error 1288
+update v2 set a= 10 where a=200;
+# just view selects
+select * from v3;
+select * from v2;
+# prepare statement with updating join view
+set @a= 10;
+set @b= 100;
+prepare stmt1 from "update v3 set a= ? where a=?";
+execute stmt1 using @a,@b;
+select * from v3;
+set @a= 300;
+set @b= 10;
+execute stmt1 using @a,@b;
+select * from v3;
+deallocate prepare stmt1;
+drop view v3,v2;
+drop tables t1,t2;
+
+#
+# inserting/deleting join view
+#
+create table t1 (a int, primary key (a), b int);
+create table t2 (a int, primary key (a), b int);
+insert into t2 values (1000, 2000);
+create view v3 (a,b) as select t1.a as a, t2.a as b from t1, t2;
+# inserting into join view without field list
+-- error 1365
+insert into v3 values (1,2);
+-- error 1365
+insert into v3 select * from t2;
+# inserting in several tables of join view
+-- error 1364
+insert into v3(a,b) values (1,2);
+-- error 1364
+insert into v3(a,b) select * from t2;
+# correct inserts into join view
+insert into v3(a) values (1);
+insert into v3(b) values (10);
+insert into v3(a) select a from t2;
+insert into v3(b) select b from t2;
+insert into v3(a) values (1) on duplicate key update a=a+10000+VALUES(a);
+select * from t1;
+select * from t2;
+# view without primary key
+create view v2 (a,b) as select t1.b as a, t2.a as b from t1, t2;
+-- error 1288
+insert into v2(a) values (10);
+# just view selects
+select * from v3;
+select * from v2;
+# try delete from join view
+-- error 1366
+delete from v3;
+-- error 1366
+delete v3,t1 from v3,t1;
+# delete from t1 just to reduce result set size
+delete from t1;
+# prepare statement with insert join view
+prepare stmt1 from "insert into v3(a) values (?);";
+set @a= 100;
+execute stmt1 using @a;
+set @a= 300;
+execute stmt1 using @a;
+deallocate prepare stmt1;
+prepare stmt1 from "insert into v3(a) select ?;";
+set @a= 101;
+execute stmt1 using @a;
+set @a= 301;
+execute stmt1 using @a;
+deallocate prepare stmt1;
+select * from v3;
+
+drop view v3,v2;
+drop tables t1,t2;