bzr commit into mysql-5.5-next-mr branch (alik:2961) Bug#45989

[Alexander Nozdrin]

#At file:///mnt/raid/alik/MySQL/bzr/00.merges/mysql-next-mr-merge.2/ based on revid:alik@stripped

 2961 Alexander Nozdrin	2010-01-27 [merge]
      Null-merge the following changeset from mysql-trunk-merge:
      =========================================================
      revision-id: joro@stripped
      committer: Georgi Kodinov <joro@stripped>
      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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