#
# Bug#49907: ALTER TABLE ... TRUNCATE PARTITION
#            does not wait for locks on the table
#
CREATE TABLE t1 (a INT)
ENGINE = InnoDB
PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (15),
PARTITION pMax VALUES LESS THAN MAXVALUE);
INSERT INTO t1 VALUES (1), (11), (21), (33);
BEGIN;
DELETE FROM t1 WHERE a = 11;
SELECT * FROM t1;
a
1
21
33
# con1 (send)
ALTER TABLE t1 TRUNCATE PARTITION pMax;
# con default
SELECT * FROM t1;
a
1
21
33
# Commit will allow the TRUNCATE to finish
COMMIT;
# con1 (reap)
# con1 (disconnect)
# default connection
SELECT * FROM t1;
a
1
DROP TABLE t1;
#
# Bug#50561: ALTER PARTITIONS does not have adequate lock, breaks with
#            concurrent I_S query
#
# This test is modified after WL#9814. The test case now cannot show
# the partitions that are altered after I_S query execution is started.
# That is because, the I_S system view execution sees snapshot (MVCC) of
# DD metadata at the time the I_S system view select started processing.
#
# The test is updated to verify a case when a partition is removed after
# I_S query starts executing. It is expected that I_S query report a
# error and continue processing more rows.
#
create table t1 (a int)
engine = innodb stats_persistent=0
partition by range (a)
(partition p0 values less than MAXVALUE);
insert into t1 values (1), (11), (21), (33);
SELECT * FROM t1;
a
1
11
21
33
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci STATS_PERSISTENT=0
/*!50100 PARTITION BY RANGE (`a`)
(PARTITION p0 VALUES LESS THAN MAXVALUE ENGINE = InnoDB) */
t1#P#p0.ibd
SET DEBUG_SYNC='before_open_in_IS_query SIGNAL parked WAIT_FOR open';
SELECT TABLE_SCHEMA, TABLE_NAME, PARTITION_NAME, PARTITION_ORDINAL_POSITION,
PARTITION_DESCRIPTION, TABLE_ROWS
FROM INFORMATION_SCHEMA.PARTITIONS
WHERE TABLE_NAME = 't1' AND TABLE_SCHEMA = 'test';
SET DEBUG_SYNC = 'now WAIT_FOR parked';
SET DEBUG_SYNC = 'alter_table_inplace_before_commit SIGNAL open WAIT_FOR alter';
ALTER TABLE t1 REORGANIZE PARTITION p0 INTO
(PARTITION p1 VALUES LESS THAN (10),
PARTITION p10 VALUES LESS THAN MAXVALUE);
SET DEBUG_SYNC = 'now SIGNAL alter';
TABLE_SCHEMA	TABLE_NAME	PARTITION_NAME	PARTITION_ORDINAL_POSITION	PARTITION_DESCRIPTION	TABLE_ROWS
test	t1	p0	1	MAXVALUE	NULL
Warnings:
Warning	1735	Unknown partition 'p0' in table 't1'
t1#P#p1.ibd
t1#P#p10.ibd
SHOW CREATE TABLE t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `a` int(11) DEFAULT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci STATS_PERSISTENT=0
/*!50100 PARTITION BY RANGE (`a`)
(PARTITION p1 VALUES LESS THAN (10) ENGINE = InnoDB,
 PARTITION p10 VALUES LESS THAN MAXVALUE ENGINE = InnoDB) */
SELECT * FROM t1;
a
1
11
21
33
drop table t1;
SET DEBUG_SYNC = 'RESET';