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Fix for bug bug#23651 "Server crashes when trigger which uses

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stored function invoked from different connections".

Invocation of trigger which was using stored function from different
connections caused server crashes (for non-debug server this happened
in highly concurrent environment, but debug server failed on assertion
in relatively simple scenario).

Item_func_sp was not safe to use in triggers (in other words for
re-execution from different threads) as artificial TABLE object
pointed by Item_func_sp::dummy_table referenced incorrect THD
object. To fix the problem we force re-initialization of this
object for each re-execution of statement.
This commit is contained in:
dlenev@mockturtle.local
2006-11-13 11:10:49 +03:00
parent 8bc5a89178
commit dd1a4f5742
3 changed files with 36 additions and 0 deletions
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15
mysql-test/r/trigger.result
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@@ -1241,4 +1241,19 @@ i j
2 2
13 13
drop table t1;
drop table if exists t1;
drop function if exists f1;
create table t1 (i int);
create function f1() returns int return 10;
create trigger t1_bi before insert on t1 for each row set @a:= f1() + 10;
insert into t1 values ();
select @a;
@a
20
insert into t1 values ();
select @a;
@a
20
drop table t1;
drop function f1;
End of 5.0 tests