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79 lines
2.3 KiB
79 lines
2.3 KiB
5 months ago
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--source include/force_myisam_default.inc
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--source include/have_myisam.inc
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--echo
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--echo Bug#26141 mixing table types in trigger causes full
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--echo table lock on innodb table
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--echo
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--echo Ensure we do not open and lock tables for the triggers we do not
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--echo fire.
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--echo
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# Note, for InnoDB to allow concurrent UPDATE and INSERT the
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# table must have a unique key.
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create table t1 (c int primary key) engine=innodb;
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create table t2 (c int) engine=myisam;
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create table t3 (c int) engine=myisam;
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insert into t1 (c) values (1);
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delimiter |;
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create trigger trg_bug26141_ai after insert on t1
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for each row
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begin
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insert into t2 (c) values (1);
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# We need the 'sync' lock to synchronously wait in connection 2 till
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# the moment when the trigger acquired all the locks.
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select release_lock("lock_bug26141_sync") into @a;
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# 1000 is time in seconds of lock wait timeout -- this is a way
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# to cause a manageable sleep up to 1000 seconds
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select get_lock("lock_bug26141_wait", 1000) into @a;
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end|
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create trigger trg_bug26141_au after update on t1
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for each row
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begin
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insert into t3 (c) values (1);
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end|
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delimiter ;|
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# Establish an alternative connection.
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--connect (connection_aux,localhost,root,,test,,)
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--connect (connection_update,localhost,root,,test,,)
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connection connection_aux;
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# Lock the wait lock, it must not be locked, so specify zero timeout.
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select get_lock("lock_bug26141_wait", 0);
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#
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connection default;
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#
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# Run the trigger synchronously
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#
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select get_lock("lock_bug26141_sync", /* must not be priorly locked */ 0);
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# Will acquire the table level locks, perform the insert into t2,
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# release the sync lock and block on the wait lock.
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send insert into t1 (c) values (2);
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connection connection_update;
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# Wait for the trigger to acquire its locks and unlock the sync lock.
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select get_lock("lock_bug26141_sync", 1000);
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#
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# This must continue: after the fix for the bug, we do not
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# open tables for t2, and with c=4 innobase allows the update
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# to run concurrently with insert.
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update t1 set c=3 where c=1;
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select release_lock("lock_bug26141_sync");
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connection connection_aux;
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select release_lock("lock_bug26141_wait");
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connection default;
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reap;
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select * from t1;
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select * from t2;
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select * from t3;
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# Drops the trigger as well.
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drop table t1, t2, t3;
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disconnect connection_update;
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disconnect connection_aux;
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