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Fix bug in INSERT DELAYED with prepared statements

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The bug was that if you have two TL_WRITE_DELAYED at the same time,
mi_lock_databases() could be done in the wrong order and we could write the wrong header to the MyISAM index file.
This commit is contained in:
monty@mysql.com
2005-01-14 00:09:15 +02:00
parent 7c457a1bd7
commit 249f914c21
3 changed files with 34 additions and 1 deletions
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6
sql/sql_prepare.cc
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@@ -897,8 +897,12 @@ static int mysql_test_insert(Prepared_statement *stmt,
/*
open temporary memory pool for temporary data allocated by derived
tables & preparation procedure
Note that this is done without locks (should not be needed as we will not
access any data here)
If we would use locks, then we have to ensure we are not using
TL_WRITE_DELAYED as having two such locks can cause table corruption.
*/
if (open_and_lock_tables(thd, table_list))
if (open_normal_and_derived_tables(thd, table_list))
{
DBUG_RETURN(-1);
}