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Sergey Petrunya authored
- If an UPDATE 1) modifies the key it is using, and 2) has ORDER BY ... LIMIT which matches the key it is using, Then we should use "Using buffer", not "Using filesort".
07a52afd
- If an UPDATE 1) modifies the key it is using, and 2) has ORDER BY ... LIMIT which matches the key it is using, Then we should use "Using buffer", not "Using filesort".