Igor Babaev caf110fa52 MDEV-21883 Server crashes when joining a subselect with 32 tables and GROUP BY ...

This bug could cause a crash for any query that used a derived table/view/CTE
whose specification was a SELECT with a GROUP BY clause and a FROM list
containing 32 or more table references.
The problem appeared only in the cases when the splitting optimization
could be applied to such derived table/view/CTE.

2020-03-23 19:21:57 -07:00

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