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unknown authored
(COUNT(*) = 1) not working in SELECT inside prepared statement. Note: the warning was introduced in 5.0 and 5.1, 4.1 is OK with the original fix. The problem was that in 5.0 and 5.1 clear() for group functions may access hybrid_type member, and this member is initialized in fix_fields(). So we should not call clear() from item cleanup() methods, as cleanup() may be called for unfixed items. sql/item_sum.cc: Do not call clear() from item cleanup() methods, as cleanup() may be called for unfixed items, and clear() assumes the item was fixed. sql/item_sum.h: Do not call clear() from item cleanup() methods, as cleanup() may be called for unfixed items, and clear() assumes the item was fixed.
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