Raise Application Error In Mysql
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Mysql Raise Error In Trigger
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Mysql Trigger Error Handling
of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Throw an error in a MySQL trigger up vote 89 down vote favorite 16 If I https://dev.mysql.com/doc/refman/5.5/en/signal.html have a trigger before the update on a table, how can I throw an error that prevents the update on that table? mysql database triggers share|improve this question edited Mar 11 at 8:26 un-lucky 11.9k41341 asked Aug 1 '08 at 12:12 maclema 9,26963041 add a comment| 6 Answers 6 active oldest votes up vote 34 down vote accepted Here is one hack that may work. It isn't clean, but it looks http://stackoverflow.com/questions/24/throw-an-error-in-a-mysql-trigger like it might work: Essentially, you just try to update a column that doesn't exist. share|improve this answer edited Dec 24 '12 at 21:24 weddingcakes 4521612 answered Aug 1 '08 at 13:02 Justin 1,55222956 Hi can you make a practical example on how to write the trigger in the link?I have two columns (idUser and idGuest) that must be mutually exclusive in the table orders, but i'm fairly new to triggers and i'm finding difficulties in writing it!Thx. –Nicola Peluchetti Mar 12 '11 at 14:44 add a comment| up vote 79 down vote As of MySQL 5.5, you can use the SIGNAL syntax to throw an exception: signal sqlstate '45000' set message_text = 'My Error Message'; State 45000 is a generic state representing "unhandled user-defined exception". Here is a more complete example of the approach: delimiter // use test// create table trigger_test ( id int not null )// drop trigger if exists trg_trigger_test_ins // create trigger trg_trigger_test_ins before insert on trigger_test for each row begin declare msg varchar(128); if new.id < 0 then set msg = concat('MyTriggerError: Trying to insert a negative value in trigger_test: ', cast(new.id as char)); signal sqlstate '45000' set message_text = msg; end if; end // delimiter ; -- run the following as seperate statements:
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us http://stackoverflow.com/questions/4862911/how-to-throw-an-error-in-mysql-procedure Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to throw an error in MySql procedure? up error in vote 10 down vote favorite What is the mechanism to force the MySQL to throw an error within the stored procedure? I have a procedure which call s another function: PREPARE my_cmd FROM @jobcommand; EXECUTE my_cmd; DEALLOCATE PREPARE my_cmd; the job command is: jobq.exec("Select 1;wfdlk# to simulatte an error"); then: CREATE PROCEDURE jobq.`exec`(jobID VARCHAR(128),cmd TEXT) BEGIN DECLARE result INT DEFAULT 0; SELECT sys_exec( CONCAT('echo ',cmd,' | base64 error in mysql -d > ', '/tmp/jobq.',jobID,'.sh ; bash /tmp/jobq.',jobID,'.sh &> /tmp/jobq.',jobID)) INTO result; IF result>0 THEN # call raise_mysql_error(result); END IF; END; My jobq.exec is always succeeding. Are there way to rise an error? How to implement raise_mysql_error function?? BTW I am using MySQL 5.5.8 thanks Arman. mysql stored-procedures throw stored-functions share|improve this question asked Feb 1 '11 at 13:06 Arman 1,90662954 1 related : stackoverflow.com/questions/465727/… –Haim Evgi Feb 1 '11 at 13:09 also read this chapter docstoc.com/docs/687360/Error-Handling-In-Stored-Procedure –Haim Evgi Feb 1 '11 at 13:11 add a comment| 2 Answers 2 active oldest votes up vote 8 down vote accepted Yes, there is: use the SIGNAL keyword. share|improve this answer edited Sep 2 '14 at 16:52 Air 3,85912446 answered Feb 1 '11 at 13:20 Halasy 961 2 Thank you! DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET err= 1 exactly that what I need!!! –Arman Feb 2 '11 at 11:11 add a comment| up vote 6 down vote You may use following stored procedure to emulate error-throwing: CREATE PROCEDURE `raise`(`errno` BIGINT UNSIGNED, `message` VARCHAR(256)) BEGIN SIGNAL SQLSTATE 'ERR0R' SET MESSAGE_TEXT = `message`, MYSQL_ERRNO = `errno`; END Example: CALL `raise`(1356, 'My Error Message'); share|improve this answer answered May 20 '13 at 7