^^&&^^

Edit File: partition_debug_sync.result

DROP TABLE IF EXISTS t1, t2;
SET DEBUG_SYNC= 'RESET';
#
# Bug#42438: Crash ha_partition::change_table_ptr
# Test when remove partitioning is done while drop table is waiting
# for the table.
# After MDL was introduced, there is no longer any race, so test is done
# by adding a small sleep to verify that the delete waits. This happens
# only until ALTER tries to upgrade its MDL lock, which ends up in MDL
# deadlock which is correctly reported.
# Con 1
SET DEBUG_SYNC= 'RESET';
CREATE TABLE t1
(a INTEGER,
b INTEGER NOT NULL,
KEY (b))
ENGINE = MYISAM
/*!50100  PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (2),
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= 'mdl_acquire_lock_wait SIGNAL waiting_for_upgrade';
ALTER TABLE t1 REMOVE PARTITIONING;
# Con default
SET DEBUG_SYNC= 'now WAIT_FOR removing_partitioning';
SET DEBUG_SYNC= 'mdl_acquire_lock_wait SIGNAL waiting_for_alter';
SET DEBUG_SYNC= 'rm_table_no_locks_before_delete_table WAIT_FOR waiting_for_upgrade';
DROP TABLE IF EXISTS t1;
# Con 1
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
SET SESSION debug= "-d,sleep_before_create_table_no_lock";
SET DEBUG_SYNC= 'RESET';
SET DEBUG_SYNC= 'RESET';
#
# Bug#42438: Crash ha_partition::change_table_ptr
# Test when remove partitioning is failing due to drop table is already
# in progress.
# After MDL was introduced, there is no longer any race, so test is done
# by adding a small sleep to verify that the alter waits.
CREATE TABLE t2
(a INTEGER,
b INTEGER NOT NULL,
KEY (b))
ENGINE = MYISAM
/*!50100  PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (2),
PARTITION p1 VALUES LESS THAN (20),
PARTITION p2 VALUES LESS THAN (100),
PARTITION p3 VALUES LESS THAN MAXVALUE ) */;
SET DEBUG_SYNC= 'alter_table_before_open_tables SIGNAL removing_partitions WAIT_FOR waiting_for_alter';
SET DEBUG_SYNC= 'alter_table_before_rename_result_table WAIT_FOR delete_done';
ALTER TABLE t2 REMOVE PARTITIONING;
# Con default
SET SESSION debug= "+d,sleep_before_no_locks_delete_table";
SET DEBUG_SYNC= 'now WAIT_FOR removing_partitions';
SET DEBUG_SYNC= 'rm_table_no_locks_before_delete_table SIGNAL waiting_for_alter';
SET DEBUG_SYNC= 'rm_table_no_locks_before_binlog SIGNAL delete_done';
DROP TABLE IF EXISTS t2;
SET SESSION debug= "-d,sleep_before_no_locks_delete_table";
# Con 1
ERROR 42S02: Table 'test.t2' doesn't exist
SET DEBUG_SYNC= 'RESET';
# Con default
SET DEBUG_SYNC= 'RESET';
End of 5.1 tests
#
# Coverage test for non pruned ha_partition::store_lock()
#
CREATE TABLE t1 (a int) ENGINE = InnoDB;
CREATE TABLE t2 (a int PRIMARY KEY)
ENGINE = InnoDB PARTITION BY HASH (a) PARTITIONS 3;
HANDLER t1 OPEN;
# Con1
LOCK TABLES t1 WRITE, t2 READ;
# Default
SET DEBUG_SYNC="wait_for_lock SIGNAL locking";
INSERT INTO t2 VALUES (1), (2), (3);
# Con1
SET DEBUG_SYNC="now WAIT_FOR locking";
ALTER TABLE t1 ADD COLUMN b int;
# Default
ERROR HY000: Wait on a lock was aborted due to a pending exclusive lock
SELECT 1;
1
1
# Con1
UNLOCK TABLES;
# Default
DROP TABLE t1, t2;