MySQL尝试捕获存储过程-SQL语法错误1064

Question

I'm trying to create a try-catch type stored procedure in MySQL:

DELIMITER $$
DROP PROCEDURE IF EXISTS `SQL_TRY_CATCH` $$

CREATE PROCEDURE `SQL_TRY_CATCH`()
BEGIN
    DECLARE `_rollback` BOOL DEFAULT 0;
    DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET `_rollback` = 1;
    START TRANSACTION;
    UPDATE `devices` SET 
        `cabinet` = '46',
        `name` = 'Test Device',
        `type` = 'Test Type',
        `u_size` = '27',
        `service_tag` = '35sdf35',
        `port_1` = '10.10.1.1',
        `drac` = '10.10.1.2',
        `notes` = 'Notes 1',
        `hd_info` = 'HD Info 2'
    WHERE `id`='45';
    IF `_rollback` THEN
        ROLLBACK;
    ELSE
        COMMIT;
    END IF;
END $$

DELIMITER ;

But, I get this error below every time I run it:

Error # 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '

DELIMITER $$
DROP PROCEDURE IF EXISTS `SQL_TRY_CATCH` $$

CREATE PROCEDUR

' at line 1

Can someone point me in the right direction of what I'm doing wrong?

Thanks.

Answer 1

you have too many semicolon in your script? Try removing semicolon after SQL_TRY_CATCH() and BEGIN and START TRANSACTION and also add return type for function RETURNS VARCHAR or RETURNS INT or whatever you want

    DELIMITER $$
    DROP FUNCTION IF EXISTS `SQL_TRY_CATCH`$$
    CREATE FUNCTION `SQL_TRY_CATCH`() RETURNS INT
    BEGIN
        DECLARE `_rollback` BOOL DEFAULT 0;
        DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET `_rollback` = 1;
        START TRANSACTION;
        '.$sql.';
        IF `_rollback` THEN
            ROLLBACK;
        ELSE
            COMMIT;
        END IF;
    END$$
    DELIMITER ;

UPDATE

DELIMITER $$
DROP PROCEDURE IF EXISTS `SQL_TRY_CATCH`;$$

CREATE PROCEDURE `SQL_TRY_CATCH`()
BEGIN
    DECLARE `_rollback` BOOL DEFAULT 0;
    DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET `_rollback` = 1;
    START TRANSACTION;
    UPDATE entities SET `slug`='servers' WHERE `slug`='devices';
    IF `_rollback` THEN
        ROLLBACK;
    ELSE
        COMMIT;
    END IF;
END$$

DELIMITER ;