BENCHMARK(count,expr) BENCHMARK() é¢æ°ã¯ãå¼ expr ã count ã®åæ°ã ãç¹°ãè¿ãå®è¡ãã¾ãã MySQL ã«ããå¼ã®å¦çé度ãè¨æ¸¬ããéã«ä½¿ç¨ãããå ´åãããã¾ãã NULL ãè² ã®ç¹°è¿ãåæ°ãªã©ã®ä¸é©åãªå¼æ°ã®å ´åãçµæå¤ã¯ 0 ã¾ã㯠NULL ã§ãã ãã®ä½¿ç¨ç®çã¯ãmysql ã¯ã©ã¤ã¢ã³ãå
ãããã¯ã¨ãªã¼ã®å®è¡æéãã¬ãã¼ããããã¨ã§ãã mysql> SELECT BENCHMARK(1000000,AES_ENCRYPT('hello','goodbye')); +---------------------------------------------------+ | BENCHMARK(1000000,AES_ENCRYPT('hello','goodbye')) | +-----------------------------
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