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mariadb/mysql-test/r
Sergey Glukhov 86ef233232 Bug#54488 crash when using explain and prepared statements with subqueries
The crash happens because original join table is replaced with temporary table
at execution stage and later we attempt to use this temporary table in
select_describe. It might happen that
Item_subselect::update_used_tables() method which sets const_item flag
is not called by some reasons (no where/having conditon in subquery for example).
It prevents JOIN::join_tmp creation and breaks original join.
The fix is to call ::update_used_tables() before ::const_item() check.
2010-10-01 14:08:38 +04:00
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