Merge 10.2 into 10.3

mysql-test/main/cte_recursive.result

@@ -3606,6 +3606,54 @@ Mandelbrot Set
                 ..............................................................................        
                   ...........................................................................         
                    ........................................................................           
+#
+# MDEV-17871: EXPLAIN for query with not used recursive cte
+#
+create table t1 (a int);
+insert into t1 values (2), (1), (4), (3);
+explain extended
+with recursive cte as
+(select * from t1 where a=1 union select a+1 from cte where a<3)
+select * from cte as t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	4	100.00	
+2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+3	RECURSIVE UNION	<derived2>	ALL	NULL	NULL	NULL	NULL	4	100.00	Using where
+NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	NULL	
+Warnings:
+Note	1003	with recursive cte as (/* select#2 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where `test`.`t1`.`a` = 1 union /* select#3 */ select `cte`.`a` + 1 AS `a+1` from `cte` where `cte`.`a` < 3)/* select#1 */ select `t`.`a` AS `a` from `cte` `t`
+with recursive cte as
+(select * from t1 where a=1 union select a+1 from cte where a<3)
+select * from cte as t;
+a
+1
+2
+3
+explain extended
+with recursive cte as
+(select * from t1 where a=1 union select a+1 from cte where a<3)
+select * from t1 as t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	4	100.00	
+Warnings:
+Note	1003	with recursive cte as (/* select#2 */ select `*` AS `*` from `test`.`t1` where `a` = 1 union /* select#3 */ select `a` + 1 AS `a+1` from `cte` where `a` < 3)/* select#1 */ select `test`.`t`.`a` AS `a` from `test`.`t1` `t`
+with recursive cte as
+(select * from t1 where a=1 union select a+1 from cte where a<3)
+select * from t1 as t;
+a
+2
+1
+4
+3
+create table t2 ( i1 int, i2 int);
+insert into t2 values (1,1),(2,2);
+explain
+with recursive cte as
+( select * from t1 union select s1.* from t1 as s1, cte where s1.i1 = cte.i2 )
+select * from t1 as t;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	4	
+drop table t1,t2;
 # End of 10.2 tests
 #
 # MDEV-14217 [db crash] Recursive CTE when SELECT includes new field

mysql-test/main/cte_recursive.test

@@ -2496,6 +2496,45 @@ SELECT GROUP_CONCAT(
 GROUP BY Iy
 ORDER BY Iy;
 
+--echo #
+--echo # MDEV-17871: EXPLAIN for query with not used recursive cte
+--echo #
+
+create table t1 (a int);
+insert into t1 values (2), (1), (4), (3);
+
+let $rec_cte =
+with recursive cte as
+  (select * from t1 where a=1 union select a+1 from cte where a<3);
+
+eval
+explain extended
+$rec_cte
+select * from cte as t;
+
+eval
+$rec_cte
+select * from cte as t;
+
+eval
+explain extended
+$rec_cte
+select * from t1 as t;
+
+eval
+$rec_cte
+select * from t1 as t;
+
+create table t2 ( i1 int, i2 int);
+insert into t2 values (1,1),(2,2);
+
+explain
+with recursive cte as
+ ( select * from t1 union select s1.* from t1 as s1, cte where s1.i1 = cte.i2 )
+select * from t1 as t;
+
+drop table t1,t2;
+
 --echo # End of 10.2 tests
 
 --echo #

mysql-test/suite/galera/disabled.def

@@ -29,12 +29,12 @@ MW-416 : MDEV-13549 Galera test failures
 MW-388 : MDEV-13549 Galera test failures
 MW-44 : MDEV-15809 Test failure on galera.MW-44
 galera_pc_ignore_sb : MDEV-15811 Test failure on galera_pc_ignore_sb
+galera_drop_database : MDEV-17421 mtr does not restart the server whose parameters were changed
 galera_kill_applier : race condition at the start of the test
 galera_ist_progress: MDEV-15236 galera_ist_progress fails when trying to read transfer status
 pxc-421: Lock timeout exceeded
 galera_sst_mysqldump_with_key : MDEV-16890 Galera test failure
 galera_sst_xtrabackup-v2-options : Failed to read uuid:seqno and wsrep_gtid_domain_id from joiner script
-MW-328C : Timeouts
 galera_gcs_fc_limit : Timeouts
 pool_of_threads: WSREP has not yet prepared node for application use
 galera_var_innodb_disallow_writes : Timeout
@@ -47,7 +47,6 @@ galera_gc_fc_limit : MDEV-17061 Test failure on galera.galera_gc_fc_limit
 galera_as_slave_replication_budle : MDEV-15785 Test case galera_as_slave_replication_bundle caused debug assertion
 galera_wan : MDEV-17259: Test failure on galera.galera_wan
 galera_pc_ignore_sb : MDEV-17357 Test failure on galera.galera_pc_ignore_sb
-galera_drop_database : test
+MW-328A : MDEV-17847 Galera test failure on MW-328[A|B|C]
-galera.MW-328A : MDEV-17847 Galera test failure on MW-328[A|B|C]
+MW-328B : MDEV-17847 Galera test failure on MW-328[A|B|C]
-galera.MW-328B : MDEV-17847 Galera test failure on MW-328[A|B|C]
+MW-328C : MDEV-17847 Galera test failure on MW-328[A|B|C]
-galera.MW-328C : MDEV-17847 Galera test failure on MW-328[A|B|C]

mysql-test/suite/innodb/r/table_flags.result

@@ -192,3 +192,8 @@ ib_logfile0
 ib_logfile1
 ibdata1
 sys_tables.bin
+call mtr.add_suppression("ERROR HY000: Can't create table `test`.`t1`");
+CREATE TABLE t1(f1 INT, f2 VARCHAR(1), KEY k1(f2),
+FULLTEXT KEY(f2),
+FOREIGN KEY (f2) REFERENCES t1(f3))ENGINE=InnoDB;
+ERROR HY000: Can't create table `test`.`t1` (errno: 150 "Foreign key constraint is incorrectly formed")

mysql-test/suite/innodb/t/table_flags.test

@@ -216,3 +216,9 @@ DROP TABLE tr,tc,td,tz,tp;
 --list_files $bugdir
 --remove_files_wildcard $bugdir
 --rmdir $bugdir
+
+call mtr.add_suppression("ERROR HY000: Can't create table `test`.`t1`");
+--error ER_CANT_CREATE_TABLE
+CREATE TABLE t1(f1 INT, f2 VARCHAR(1), KEY k1(f2),
+		FULLTEXT KEY(f2),
+		FOREIGN KEY (f2) REFERENCES t1(f3))ENGINE=InnoDB;

sql/sql_select.cc

@@ -25744,13 +25744,13 @@ int JOIN::save_explain_data_intern(Explain_query *output,
       (1) they are not parts of ON clauses that were eliminated by table 
           elimination.
       (2) they are not merged derived tables
-      (3) they are not unreferenced CTE
+      (3) they are not hanging CTEs (they are needed for execution)
     */
     if (!(tmp_unit->item && tmp_unit->item->eliminated) &&    // (1)
         (!tmp_unit->derived ||
          tmp_unit->derived->is_materialized_derived()) &&     // (2)
-        !(tmp_unit->with_element && 
+        !(tmp_unit->with_element &&
-          !tmp_unit->with_element->is_referenced()))          // (3)
+          (!tmp_unit->derived || !tmp_unit->derived->derived_result))) // (3)
    {
       explain->add_child(tmp_unit->first_select()->select_number);
     }
@@ -25811,11 +25811,12 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
       Save plans for child subqueries, when
       (1) they are not parts of eliminated WHERE/ON clauses.
       (2) they are not VIEWs that were "merged for INSERT".
-      (3) they are not unreferenced CTE.
+      (3) they are not hanging CTEs (they are needed for execution)
     */
     if (!(unit->item && unit->item->eliminated) &&                     // (1)
         !(unit->derived && unit->derived->merged_for_insert) &&        // (2)
-        !(unit->with_element && !unit->with_element->is_referenced())) // (3)  
+        !(unit->with_element &&
+          (!unit->derived || !unit->derived->derived_result)))         // (3)
     {
       if (mysql_explain_union(thd, unit, result))
         DBUG_VOID_RETURN;

sql/sql_union.cc

@@ -1046,8 +1046,11 @@ bool st_select_lex_unit::prepare(TABLE_LIST *derived_arg,
                                               0))
           goto err;
         if (!derived_arg->table)
-          derived_arg->table= derived_arg->derived_result->table=
+        {
-            with_element->rec_result->rec_tables.head();
+          derived_arg->table= with_element->rec_result->rec_tables.head();
+          if (derived_arg->derived_result)
+            derived_arg->derived_result->table= derived_arg->table;
+        }
         with_element->mark_as_with_prepared_anchor();
         is_rec_result_table_created= true;
       }

storage/innobase/fil/fil0crypt.cc

@@ -2562,7 +2562,7 @@ fil_space_verify_crypt_checksum(
 		return (true);
 	}
 
-	uint32 cchecksum1, cchecksum2;
+	uint32_t cchecksum1, cchecksum2;
 
 	/* Calculate checksums */
 	if (page_size.is_compressed()) {
@@ -2645,10 +2645,19 @@ fil_space_verify_crypt_checksum(
 #else /* UNIV_INNOCHECKSUM */
 		ib::error()
 			<< " Page " << space << ":" << offset
-			<< " may be corrupted."
+			<< " may be corrupted.";
-			" Post encryption checksum " << checksum
+		ib::info()
-			<< " stored [" << checksum1 << ":" << checksum2
+			<< "If encrypted:  stored checksum" << checksum
+			<< " calculated checksum [" << cchecksum1 << ":" << cchecksum2
 			<< "] key_version " << key_version;
+		ib::info()
+			<< "If unencrypted: stored checksum [" << checksum1
+			<< ":" << checksum2 << "] calculated crc32 ["
+			<< buf_calc_page_crc32(page, false) << ":"
+			<< buf_calc_page_crc32(page, true) << "] innodb ["
+			<< buf_calc_page_old_checksum(page) << ":"
+			<< buf_calc_page_new_checksum(page) << "] LSN "
+			<< mach_read_from_4(page + FIL_PAGE_LSN);
 #endif
 		encrypted = false;
 	}

storage/innobase/handler/ha_innodb.cc

@@ -12596,7 +12596,8 @@ ha_innobase::create(
 		if (info.drop_before_rollback()) {
 			trx->error_state = DB_SUCCESS;
 			row_drop_table_for_mysql(info.table_name(),
-						 trx, SQLCOM_TRUNCATE, true);
+						 trx, SQLCOM_TRUNCATE, true,
+						 false);
 		}
 		trx_rollback_for_mysql(trx);
 		row_mysql_unlock_data_dictionary(trx);