76 lines
1.5 KiB
SQL
76 lines
1.5 KiB
SQL
CREATE TABLE IF NOT EXISTS print_relative (run INT, stmt INT, elapsed BIGINT);
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delimiter //
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CREATE PROCEDURE benchmark ()
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BEGIN
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DECLARE done INT DEFAULT FALSE;
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DECLARE v_ts BIGINT;
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DECLARE v_repeat INT DEFAULT 10000;
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DECLARE r, c INT;
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DECLARE a INT;
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DECLARE cur1 CURSOR FOR
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SELECT 1 AS a FROM dual;
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DECLARE cur2 CURSOR FOR
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SELECT 1 AS a FROM dual UNION SELECT 2 FROM dual UNION SELECT 3 FROM dual;
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DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
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SET r = 0;
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REPEAT
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SET v_ts = ROUND(UNIX_TIMESTAMP(CURTIME(4)) * 1000);
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SET c = 0;
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REPEAT
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OPEN cur1;
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read_loop: LOOP
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FETCH cur1 INTO a;
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IF done THEN
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LEAVE read_loop;
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END IF;
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END LOOP;
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CLOSE cur1;
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SET c = c + 1;
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UNTIL c >= v_repeat END REPEAT;
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INSERT INTO print_relative VALUES (r, 1, ROUND(UNIX_TIMESTAMP(CURTIME(4)) * 1000) - v_ts);
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SET v_ts = ROUND(UNIX_TIMESTAMP(CURTIME(4)) * 1000);
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SET c = 0;
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REPEAT
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OPEN cur2;
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read_loop: LOOP
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FETCH cur2 INTO a;
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IF done THEN
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LEAVE read_loop;
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END IF;
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END LOOP;
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CLOSE cur2;
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SET c = c + 1;
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UNTIL c >= v_repeat END REPEAT;
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INSERT INTO print_relative VALUES (r, 2, ROUND(UNIX_TIMESTAMP(CURTIME(4)) * 1000) - v_ts);
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SET r = r + 1;
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UNTIL r >= 5 END REPEAT;
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END//
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delimiter ;
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CALL benchmark();
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SELECT
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run,
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stmt,
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CAST(elapsed / MIN(elapsed) OVER() AS DECIMAL(20, 4)) ratio
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FROM print_relative;
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DROP PROCEDURE benchmark;
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DROP TABLE print_relative; |