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#
# Bug #43867 ALTER TABLE on a partitioned table
# causes unnecessary deadlocks
#
CREATE TABLE t1 (a int) PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (1),
PARTITION p1 VALUES LESS THAN (2));
INSERT INTO t1 VALUES (0),(1);
# Connection 2
BEGIN;
SELECT * FROM t1;
a
0
1
# Connection 1
ALTER TABLE t1 DROP PARTITION p3;
ERROR HY000: Error in list of partitions to DROP
# Connection 2
# This failed with deadlock and should not do so.
SELECT * FROM t1;
a
0
1
# Connection 1
DROP TABLE t1;
#
# Bug #46654 False deadlock on concurrent DML/DDL
# with partitions, inconsistent behavior
#
DROP TABLE IF EXISTS tbl_with_partitions;
CREATE TABLE tbl_with_partitions ( i INT )
PARTITION BY HASH(i);
INSERT INTO tbl_with_partitions VALUES (1);
# Connection 3
LOCK TABLE tbl_with_partitions READ;
# Connection 1
# Access table with disabled autocommit
SET AUTOCOMMIT = 0;
SELECT * FROM tbl_with_partitions;
i
1
# Connection 2
# Alter table, abort after prepare
set session debug="+d,abort_copy_table";
ALTER TABLE tbl_with_partitions ADD COLUMN f INT, ALGORITHM=COPY;
ERROR HY000: Lock wait timeout exceeded; try restarting transaction
# Connection 1
# Try accessing the table after Alter aborted.
# This used to give ER_LOCK_DEADLOCK.
SELECT * FROM tbl_with_partitions;
i
1
# Connection 3
UNLOCK TABLES;
# Connection 1
# Cleanup
DROP TABLE tbl_with_partitions;
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