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Null-merge the following changeset from mysql-trunk-merge:
========================================================= revision-id: joro@sun.com-20100118155046-v6hvlyfmitcyep8p committer: Georgi Kodinov <joro@sun.com> branch nick: B45989-5.1-bugteam timestamp: Mon 2010-01-18 17:50:46 +0200 message: Bug #45989 take 2 : memory leak after explain encounters an error in the query. Fixes a leak after materializing a GROUP BY subquery to a temp table when the subquery has a blob column in the SELECT list. Fixed by correctly destructing temporary buffers after doing the conversion. =========================================================
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