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Addendum to the fix for bug #45989

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Need to make sure the tmp join doesn't point to the structure already 
freed by the cleanup() for the "base" join, as this can lead to 
double free, because sometimes both tmp_join and join point to the 
same tmp_table_params.copy_field array.
This commit is contained in:
Georgi Kodinov
2010-02-04 18:51:55 +02:00
parent 8ceefc7d75
commit c9df74c802
1 changed files with 1 additions and 1 deletions
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sql/sql_select.cc
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@ -2319,7 +2319,7 @@ JOIN::destroy()
anywhere else (as we need to keep the join is reusable).
*/
tmp_table_param.cleanup();
tmp_table_param.copy_field= 0;
tmp_table_param.copy_field= tmp_join->tmp_table_param.copy_field= 0;
DBUG_RETURN(tmp_join->destroy());
}
cond_equal= 0;