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Fix upstream optimizer bug on OR condition (Bug #75248) #38

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yoshinorim commented

http://bugs.mysql.com/bug.php?id=75248 affects more in RocksDB than InnoDB because of costly range scan. MariaDB already fixed the problem and we already identified one line diff to fix the problem. We need to decide 1. waiting until Oracle fixes the bug and cloning into WebScaleSQL or 2. fixing WebScaleSQL directly

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