1CREATE TABLE t1 (id INT); 2DELIMITER $$; 3CREATE PROCEDURE proc1 (OUT cnt INT) COMMENT 'comment1' BEGIN SELECT COUNT(*) INTO cnt FROM t1; END$$ 4DELIMITER ;$$ 5CALL proc1(@cnt); 6SELECT @cnt; 7INSERT INTO t1 VALUES (1), (2), (3); 8CALL proc1(@cnt); 9SELECT @cnt; 10 11DELIMITER $$; 12--error ER_SP_ALREADY_EXISTS 13CREATE PROCEDURE proc1 (OUT cnt INT) COMMENT 'comment2' 14 BEGIN SELECT COUNT(*) INTO cnt FROM t1; END$$ 15SELECT comment FROM mysql.proc WHERE name='proc1'$$ 16 17CREATE PROCEDURE IF NOT EXISTS proc1 (OUT cnt INT) COMMENT 'comment3' 18 BEGIN SELECT COUNT(*) INTO cnt FROM t1; END$$ 19SELECT comment FROM mysql.proc WHERE name='proc1'$$ 20 21--error ER_WRONG_USAGE 22CREATE OR REPLACE PROCEDURE IF NOT EXISTS proc1 (OUT cnt INT) COMMENT 'comment4' 23 BEGIN SELECT COUNT(*) INTO cnt FROM t1; END$$ 24SELECT comment FROM mysql.proc WHERE name='proc1'$$ 25 26CREATE OR REPLACE PROCEDURE proc1 (OUT cnt INT) COMMENT 'comment5' 27 BEGIN SELECT COUNT(*) INTO cnt FROM t1; END$$ 28SELECT comment FROM mysql.proc WHERE name='proc1'$$ 29 30DELIMITER ;$$ 31DROP PROCEDURE proc1; 32DELIMITER $$; 33CREATE PROCEDURE IF NOT EXISTS proc1 (OUT cnt INT) BEGIN SELECT COUNT(*) INTO cnt FROM t1; END$$ 34DELIMITER ;$$ 35INSERT INTO t1 VALUES (1), (2), (3); 36CALL proc1(@cnt); 37SELECT @cnt; 38 39DROP TABLE IF EXISTS t1; 40DROP PROCEDURE IF EXISTS proc1; 41DROP PROCEDURE IF EXISTS proc1; 42