new optimizer hint syntax new optimizer hint syntax hints MAX_EXECUTION_TIME hints http://dev.mysql.com/doc/refman/5.7/en/optimizer-hints.html MAX_EXECUTION_TIME MAX_EXECUTION_TIME new optimizer hint syntax new optimizer hint syntax new optimizer hint syntax new optimizer hint syntax MAX_EXECUTION_TIME MAX_EXECUTION_TIME MAX_EXECUTION_TIME new optimizer hint syntax MAX_EXECUTION_TIME MAX_EXECUTION_TIME new optimizer hint syntax