You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
127 lines
3.1 KiB
127 lines
3.1 KiB
5 months ago
|
#
|
||
|
|
# Code coverage testing of TRUNCATE TABLE.
|
||
|
|
#
|
||
|
|
# Ingo Struewing, 2009-07-20
|
||
|
|
#
|
||
|
|
|
||
|
|
--source include/have_debug_sync.inc
|
||
|
|
SET DEBUG_SYNC='RESET';
|
||
|
|
|
||
|
|
--let $MYSQLD_DATADIR= `SELECT @@datadir`
|
||
|
|
|
||
|
|
--disable_warnings
|
||
|
|
DROP TABLE IF EXISTS t1;
|
||
|
|
--enable_warnings
|
||
|
|
|
||
|
|
--echo #
|
||
|
|
--echo # Bug#20667 - Truncate table fails for a write locked table
|
||
|
|
--echo #
|
||
|
|
########
|
||
|
|
# Attack wait_while_table_is_used(). Kill query while trying to
|
||
|
|
# upgrade MDL.
|
||
|
|
#
|
||
|
|
CREATE TABLE t1 (c1 INT);
|
||
|
|
INSERT INTO t1 VALUES (1);
|
||
|
|
#
|
||
|
|
# Acquire a shared metadata lock on table by opening HANDLER for it and wait.
|
||
|
|
# TRUNCATE shall block on this metadata lock.
|
||
|
|
# We can't use normal DML as such statements would also block LOCK TABLES.
|
||
|
|
#
|
||
|
|
--echo #
|
||
|
|
--echo # connection con1
|
||
|
|
--connect (con1, localhost, root,,)
|
||
|
|
HANDLER t1 OPEN;
|
||
|
|
#
|
||
|
|
# Get connection id of default connection.
|
||
|
|
# Lock the table and start TRUNCATE, which will block on MDL upgrade.
|
||
|
|
#
|
||
|
|
--echo #
|
||
|
|
--echo # connection default
|
||
|
|
--connection default
|
||
|
|
let $ID= `SELECT @id := CONNECTION_ID()`;
|
||
|
|
LOCK TABLE t1 WRITE;
|
||
|
|
SET DEBUG_SYNC='mdl_upgrade_lock SIGNAL waiting';
|
||
|
|
send TRUNCATE TABLE t1;
|
||
|
|
#
|
||
|
|
# Get the default connection ID into a variable in an invisible statement.
|
||
|
|
# Kill the TRUNCATE query. This shall result in an error return
|
||
|
|
# from wait_while_table_is_used().
|
||
|
|
#
|
||
|
|
--echo #
|
||
|
|
--echo # connection con2
|
||
|
|
--connect (con2, localhost, root,,)
|
||
|
|
SET DEBUG_SYNC='now WAIT_FOR waiting';
|
||
|
|
let $invisible_assignment_in_select = `SELECT @id := $ID`;
|
||
|
|
KILL QUERY @id;
|
||
|
|
--disconnect con2
|
||
|
|
--echo #
|
||
|
|
--echo # connection default
|
||
|
|
--connection default
|
||
|
|
--error ER_QUERY_INTERRUPTED
|
||
|
|
reap;
|
||
|
|
UNLOCK TABLES;
|
||
|
|
--echo #
|
||
|
|
--echo # connection con1
|
||
|
|
--connection con1
|
||
|
|
--echo # Release shared metadata lock by closing HANDLER.
|
||
|
|
HANDLER t1 CLOSE;
|
||
|
|
--disconnect con1
|
||
|
|
--echo #
|
||
|
|
--echo # connection default
|
||
|
|
--connection default
|
||
|
|
DROP TABLE t1;
|
||
|
|
SET DEBUG_SYNC='RESET';
|
||
|
|
########
|
||
|
|
# Attack acquire_exclusive_locks(). Hold a global read lock.
|
||
|
|
# Non-LOCK TABLE case.
|
||
|
|
#
|
||
|
|
CREATE TABLE t1 (c1 INT);
|
||
|
|
INSERT INTO t1 VALUES (1);
|
||
|
|
#
|
||
|
|
# Start a transaction and execute a DML in it. Since 5.4.4 this leaves
|
||
|
|
# a shared meta data lock (MDL) behind. TRUNCATE shall block on it.
|
||
|
|
#
|
||
|
|
--echo #
|
||
|
|
--echo # connection con1
|
||
|
|
--connect (con1, localhost, root,,)
|
||
|
|
START TRANSACTION;
|
||
|
|
INSERT INTO t1 VALUES (2);
|
||
|
|
#
|
||
|
|
# Get connection id of default connection.
|
||
|
|
# Start TRUNCATE, which will block on acquire_exclusive_locks().
|
||
|
|
#
|
||
|
|
--echo #
|
||
|
|
--echo # connection default
|
||
|
|
--connection default
|
||
|
|
let $ID= `SELECT @id := CONNECTION_ID()`;
|
||
|
|
SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL waiting';
|
||
|
|
send TRUNCATE TABLE t1;
|
||
|
|
#
|
||
|
|
# Get the default connection ID into a variable in an invisible statement.
|
||
|
|
# Kill the TRUNCATE query. This shall result in an error return
|
||
|
|
# from wait_while_table_is_used().
|
||
|
|
#
|
||
|
|
--echo #
|
||
|
|
--echo # connection con1
|
||
|
|
--connection con1
|
||
|
|
SET DEBUG_SYNC='now WAIT_FOR waiting';
|
||
|
|
let $invisible_assignment_in_select = `SELECT @id := $ID`;
|
||
|
|
KILL QUERY @id;
|
||
|
|
--echo #
|
||
|
|
--echo # connection default
|
||
|
|
--connection default
|
||
|
|
--error ER_QUERY_INTERRUPTED
|
||
|
|
reap;
|
||
|
|
--echo #
|
||
|
|
--echo # connection con1
|
||
|
|
--connection con1
|
||
|
|
--echo # Release SW lock by committing transaction.
|
||
|
|
COMMIT;
|
||
|
|
--disconnect con1
|
||
|
|
--echo #
|
||
|
|
--echo # connection default
|
||
|
|
--connection default
|
||
|
|
UNLOCK TABLES;
|
||
|
|
DROP TABLE t1;
|
||
|
|
SET DEBUG_SYNC='RESET';
|