Error Handling In Mysql Stored Procedure Example
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies mysql stored procedure example insert of this site About Us Learn more about Stack Overflow the company mysql stored procedure example multiple parameters Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users ms sql stored procedure example Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a http://dev.mysql.com/doc/en/declare-handler.html minute: Sign up MySQL Stored Procedure Error Handling up vote 10 down vote favorite 5 I believe there is nothing currently available in MySQL that allows access to the SQLSTATE of the last executed statement within a MySQL stored procedure. This means that when a generic SQLException is raised within a stored procedure it is hard/impossible to derive the exact nature of http://stackoverflow.com/questions/7764887/mysql-stored-procedure-error-handling the error. Does anybody have a workaround for deriving the SQLSTATE of an error in a MySQL stored procedure that does not involve declaring a handler for every possible SQLSTATE? For example - imagine that I am trying to return an error_status that goes beyond the generic "SQLException happened somewhere in this BEGIN....END block" in the following: DELIMITER $$ CREATE PROCEDURE `myProcedure`(OUT o_error_status varchar(50)) MY_BLOCK: BEGIN DECLARE EXIT handler for 1062 set o_error_status := "Duplicate entry in table"; DECLARE EXIT handler for 1048 set o_error_status := "Trying to populate a non-null column with null value"; -- declare handlers ad nauseum here.... DECLARE EXIT handler for sqlexception set o_error_status:= "Generic SQLException. You'll just have to figure out the SQLSTATE yourself...." ; -- Procedure logic that might error to follow here... END MY_BLOCK$$ Any tips? PS I am running MySQL 5.1.49 mysql stored-procedures error-handling share|improve this question edited Oct 14 '11 at 10:29 asked Oct 14 '11 at 8:19 Tom Mac 6,74621524 add a comment| 3 Answers 3 active oldest votes up vote 6 down vote accepted GET DIAGNOSTICS is available in 5.6.4 See http://dev.mysql.com/doc/refman/5.6/en/get-diagnostics.html
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 Learn more about http://stackoverflow.com/questions/465727/how-to-raise-an-error-within-a-mysql-function 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 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to raise an error within a MySQL function up vote 40 down vote stored procedure favorite 7 I've created a MySQL function and would like to raise an error if the values passed for the parameters are invalid. What are my options for raising an error within a MySQL function? mysql function exception stored-procedures share|improve this question edited Dec 9 '15 at 14:18 dolmen 3,22921421 asked Jan 21 '09 at 15:22 Dónal 99.3k137411680 add a comment| 6 Answers 6 active oldest votes up vote 38 down sql stored procedure vote MySQL 5.5 introduces signals, which are similar to exceptions in other languages: http://dev.mysql.com/doc/refman/5.5/en/signal.html For example, in the mysql command line client: mysql> SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Custom error'; ERROR 1644 (45000): Custom error share|improve this answer answered Aug 6 '12 at 13:39 Austin Hyde 11.7k1572114 add a comment| up vote 24 down vote It's actually a combination of all three answers. You call a non-existent procedure to raise the error, and then declare an exit handler that catches the error you generated. Here's an example, using SQLSTATE 42000 (procedure does not exist) to throw an error before deletion if the row to be deleted has a foreign key id set: DROP PROCEDURE IF EXISTS decount_test; DELIMITER // CREATE DEFINER = 'root'@'localhost' PROCEDURE decount_test ( p_id bigint ) DETERMINISTIC MODIFIES SQL DATA BEGIN DECLARE EXIT HANDLER FOR SQLSTATE '42000' SELECT 'Invoiced barcodes may not have accounting removed.'; IF (SELECT invoice_id FROM accounted_barcodes WHERE id = p_id ) THEN CALL raise_error; END IF; DELETE FROM accounted_barcodes WHERE id = p_id; END // DELIMITER ; Output: call decount_test(123456); +----------------------------------------------------+ | Invoiced barcodes may not have accounting removed. | +----------------------------------------------------+ | Invoiced barcodes may not have accounting removed. | +----------------------------------------------------+ share|improve this answer edited Feb 13 '12 at 15:22 Ke