manual merge fix of bug#42438 in mysql-next-mr-merge

1 files changed, 11 insertions, 3 deletions

diff --git a/mysql-test/t/partition_debug_sync.test b/mysql-test/t/partition_debug_sync.test
index 69bc86a8bb7..9165006f537 100644
--- a/mysql-test/t/partition_debug_sync.test
+++ b/mysql-test/t/partition_debug_sync.test
@@ -15,6 +15,8 @@ SET DEBUG_SYNC= 'RESET';
 --echo # Bug#42438: Crash ha_partition::change_table_ptr
 --echo # Test when remove partitioning is done while drop table is waiting
 --echo # for the table.
+--echo # After MDL was introduced, there is no longer any race, so test is done
+--echo # by adding a small sleep to verify that the delete waits.
 connect(con1, localhost, root,,);
 --echo # Con 1
 SET DEBUG_SYNC= 'RESET';
@@ -28,18 +30,20 @@ ENGINE = MYISAM
  PARTITION p1 VALUES LESS THAN (20),
  PARTITION p2 VALUES LESS THAN (100),
  PARTITION p3 VALUES LESS THAN MAXVALUE ) */;
+SET SESSION debug= "+d,sleep_before_create_table_no_lock";
 SET DEBUG_SYNC= 'alter_table_before_create_table_no_lock SIGNAL removing_partitioning WAIT_FOR waiting_for_alter';
 SET DEBUG_SYNC= 'alter_table_before_main_binlog SIGNAL partitioning_removed';
 --send ALTER TABLE t1 REMOVE PARTITIONING
 connection default;
 --echo # Con default
 SET DEBUG_SYNC= 'now WAIT_FOR removing_partitioning';
-SET DEBUG_SYNC= 'waiting_for_table SIGNAL waiting_for_alter';
+SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL waiting_for_alter';
 SET DEBUG_SYNC= 'rm_table_part2_before_delete_table WAIT_FOR partitioning_removed';
 DROP TABLE IF EXISTS t1;
 --echo # Con 1
 connection con1;
 --reap
+SET SESSION debug= "-d,sleep_before_create_table_no_lock";
 connection default;
 SET DEBUG_SYNC= 'RESET';
 connection con1;
@@ -49,6 +53,8 @@ SET DEBUG_SYNC= 'RESET';
 --echo # Bug#42438: Crash ha_partition::change_table_ptr
 --echo # Test when remove partitioning is failing due to drop table is already
 --echo # in progress.
+--echo # After MDL was introduced, there is no longer any race, so test is done
+--echo # by adding a small sleep to verify that the alter waits.
 CREATE TABLE t2
 (a INTEGER,
  b INTEGER NOT NULL,
@@ -59,15 +65,17 @@ ENGINE = MYISAM
  PARTITION p1 VALUES LESS THAN (20),
  PARTITION p2 VALUES LESS THAN (100),
  PARTITION p3 VALUES LESS THAN MAXVALUE ) */;
-SET DEBUG_SYNC= 'before_lock_tables_takes_lock SIGNAL removing_partitions WAIT_FOR waiting_for_alter';
+SET DEBUG_SYNC= 'open_tables_acquire_upgradable_mdl SIGNAL removing_partitions WAIT_FOR waiting_for_alter';
 SET DEBUG_SYNC= 'alter_table_before_rename_result_table WAIT_FOR delete_done';
 --send ALTER TABLE t2 REMOVE PARTITIONING
 connection default;
 --echo # Con default
+SET SESSION debug= "+d,sleep_before_part2_delete_table";
 SET DEBUG_SYNC= 'now WAIT_FOR removing_partitions';
-SET DEBUG_SYNC= 'waiting_for_table SIGNAL waiting_for_alter';
+SET DEBUG_SYNC= 'rm_table_part2_before_delete_table SIGNAL waiting_for_alter';
 SET DEBUG_SYNC= 'rm_table_part2_before_binlog SIGNAL delete_done';
 DROP TABLE IF EXISTS t2;
+SET SESSION debug= "-d,sleep_before_part2_delete_table";
 --echo # Con 1
 connection con1;
 --error ER_NO_SUCH_TABLE