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 2599.161.3 Ingo Struewing      2009-07-21
 Bug#20667 - Truncate table fails for a write locked table

 TRUNCATE TABLE was not allowed under LOCK TABLES.

 The patch removes this restriction. mysql_truncate()
 does now handle that case.
This commit is contained in:
Konstantin Osipov
2009-12-11 15:24:23 +03:00
parent a3814e3635
commit 700a361a6a
8 changed files with 470 additions and 35 deletions
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70
mysql-test/r/truncate_coverage.result Normal file
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SET DEBUG_SYNC='RESET';
DROP TABLE IF EXISTS t1;
#
# Bug#20667 - Truncate table fails for a write locked table
#
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1);
#
# connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (2);
#
# connection default
LOCK TABLE t1 WRITE;
SET DEBUG_SYNC='mdl_upgrade_shared_lock_to_exclusive SIGNAL waiting';
TRUNCATE TABLE t1;
#
# connection con1
SET DEBUG_SYNC='now WAIT_FOR waiting';
KILL QUERY @id;
COMMIT;
#
# connection default
ERROR 70100: Query execution was interrupted
UNLOCK TABLES;
DROP TABLE t1;
SET DEBUG_SYNC='RESET';
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1);
#
# connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (2);
#
# connection default
LOCK TABLE t1 WRITE;
SET DEBUG_SYNC='mdl_upgrade_shared_lock_to_exclusive SIGNAL waiting';
TRUNCATE TABLE t1;
#
# connection con1
SET DEBUG_SYNC='now WAIT_FOR waiting';
COMMIT;
#
# connection default
ERROR 42S02: Table 'test.t1' doesn't exist
UNLOCK TABLES;
DROP TABLE t1;
ERROR 42S02: Unknown table 't1'
SET DEBUG_SYNC='RESET';
CREATE TABLE t1 (c1 INT);
INSERT INTO t1 VALUES (1);
#
# connection con1
START TRANSACTION;
INSERT INTO t1 VALUES (2);
#
# connection default
SET DEBUG_SYNC='mdl_acquire_exclusive_locks_wait SIGNAL waiting';
TRUNCATE TABLE t1;
#
# connection con1
SET DEBUG_SYNC='now WAIT_FOR waiting';
KILL QUERY @id;
COMMIT;
#
# connection default
ERROR 70100: Query execution was interrupted
UNLOCK TABLES;
DROP TABLE t1;
SET DEBUG_SYNC='RESET';