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for InnoDB tables" Don't use thr_lock.c locks for InnoDB tables. Below is list of changes that were needed to implement this: - HANDLER OPEN acquireis MDL_SHARED_READ instead of MDL_SHARED - HANDLER READ calls external_lock() even if SE is not going to be locked by THR_LOCK - InnoDB lock wait timeouts are now honored which are much shorter by default than server lock wait timeouts (1 year vs 50 seconds) - with @@autocommit= 1 LOCK TABLES disables autocommit implicitely, though user still sees @@autocommt= 1 - the above starts implicit transaction - transactions started by LOCK TABLES are now rolled back on disconnect (previously everything was committed due to autocommit) - transactions started by LOCK TABLES are now rolled back by ROLLBACK (previously everything was committed due to autocommit) - it is now impossible to change BINLOG_FORMAT under LOCK TABLES (at least to statement) due to running transaction - LOCK TABLES WRITE is additionally handled by MDL - ...in contrast LOCK TABLES READ protection against DML is pure InnoDB - combining transactional and non-transactional tables under LOCK TABLES may cause rolled back changes in transactional table and "committed" changes in non-transactional table - user may disable innodb_table_locks, which will cause LOCK TABLES to be noop basically Removed tests for BUG#45143 and BUG#55930 which cover InnoDB + THR_LOCK. To operate properly these tests require code flow to go through THR_LOCK debug sync points, which is not the case after this patch. These tests are removed by WL#6671 as well. An alternative is to port them to different storage engine.
108 lines
2.7 KiB
Text
108 lines
2.7 KiB
Text
#
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# Code coverage testing of TRUNCATE TABLE.
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#
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# Ingo Struewing, 2009-07-20
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#
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--source include/have_debug_sync.inc
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SET DEBUG_SYNC='RESET';
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--let $MYSQLD_DATADIR= `SELECT @@datadir`
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--disable_warnings
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DROP TABLE IF EXISTS t1;
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--enable_warnings
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--echo #
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--echo # Bug#20667 - Truncate table fails for a write locked table
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--echo #
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########
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# Attack acquire_exclusive_locks(). Hold a global read lock.
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# Non-LOCK TABLE case.
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#
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CREATE TABLE t1 (c1 INT);
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INSERT INTO t1 VALUES (1);
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#
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# Start a transaction and execute a DML in it. Since 5.4.4 this leaves
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# a shared meta data lock (MDL) behind. TRUNCATE shall block on it.
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#
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--connect (con1, localhost, root,,)
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START TRANSACTION;
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INSERT INTO t1 VALUES (2);
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#
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# Get connection id of default connection.
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# Start TRUNCATE, which will block on acquire_exclusive_locks().
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#
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--connection default
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let $ID= `SELECT @id := CONNECTION_ID()`;
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SET DEBUG_SYNC='mdl_acquire_lock_wait SIGNAL waiting';
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send TRUNCATE TABLE t1;
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#
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# Get the default connection ID into a variable in an invisible statement.
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# Kill the TRUNCATE query. This shall result in an error return
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# from wait_while_table_is_used().
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#
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--connection con1
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SET DEBUG_SYNC='now WAIT_FOR waiting';
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let $invisible_assignment_in_select = `SELECT @id := $ID`;
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KILL QUERY @id;
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--connection default
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--error ER_QUERY_INTERRUPTED
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reap;
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--connection con1
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--echo # Release SW lock by committing transaction.
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COMMIT;
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--disconnect con1
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--connection default
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UNLOCK TABLES;
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DROP TABLE t1;
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SET DEBUG_SYNC='RESET';
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--echo #
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--echo # Bug#57659 Segfault in Query_cache::invalidate_data for TRUNCATE TABLE
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--echo #
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--echo # Note that this test case only reproduces the problem
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--echo # when it is run with valgrind.
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--disable_warnings
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DROP TABLE IF EXISTS t1, m1;
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--enable_warnings
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CREATE TABLE t1(a INT) engine=memory;
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CREATE TABLE m1(a INT) engine=merge UNION(t1);
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connect(con2, localhost, root);
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connect(con1, localhost, root);
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SET DEBUG_SYNC= 'open_tables_after_open_and_process_table SIGNAL opened WAIT_FOR dropped';
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--echo # Sending:
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--send TRUNCATE TABLE m1
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connection con2;
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SET DEBUG_SYNC= 'now WAIT_FOR opened';
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--echo # Sending:
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--send FLUSH TABLES
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connection default;
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--echo # Waiting for FLUSH TABLES to be blocked.
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let $wait_condition= SELECT COUNT(*)=1 FROM information_schema.processlist
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WHERE state= 'Waiting for table flush' AND info= 'FLUSH TABLES';
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--source include/wait_condition.inc
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SET DEBUG_SYNC= 'now SIGNAL dropped';
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connection con1;
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--echo # Reaping: TRUNCATE TABLE m1
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--error ER_WRONG_MRG_TABLE
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--reap
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disconnect con1;
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--source include/wait_until_disconnected.inc
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connection con2;
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--echo # Reaping: FLUSH TABLES
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--reap
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disconnect con2;
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--source include/wait_until_disconnected.inc
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connection default;
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SET DEBUG_SYNC= 'RESET';
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DROP TABLE m1, t1;
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