Mysql Return Error From Stored Procedure
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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 mysql sqlstate minute: Sign up How to raise an error within a MySQL function up vote 41 down vote 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 mysql raise error in trigger '15 at 14:18 dolmen 3,23921521 asked Jan 21 '09 at 15:22 Dónal 99.7k137411681 add a comment| 6 Answers 6 active oldest votes up vote 40 down 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 11.8k1572114 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_
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Mysql Stored Procedure Return Error Message
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this tutorial, you will learn how to use SIGNAL and RESIGNAL statements to raise error conditions inside stored procedures.MySQL SIGNAL statementYou use the SIGNAL statement to return an error or warning condition to the caller from a stored http://www.mysqltutorial.org/mysql-signal-resignal/ program e.g., stored procedure, stored function, trigger or event. The SIGNAL statement provides you with control over which information for returning such as value and messageSQLSTATE.The following illustrates syntax of the SIGNAL statement: SIGNAL SQLSTATE | condition_name; SET condition_information_item_name_1 = value_1, condition_information_item_name_1 = value_2, etc;123SIGNAL SQLSTATE | condition_name;SET condition_information_item_name_1 = value_1,condition_information_item_name_1 = value_2, etc;Following the SIGNAL keyword is a SQLSTATE value or a condition name declared by stored procedure the DECLARE CONDITION statement. Notice that the SIGNAL statement must always specify a SQLSTATE value or a named condition that defined with an SQLSTATE value.To provide the caller with information, you use the SET clause. If you want to return multiple condition information item names with values, you need to separate each name/value pair by a comma.The condition_information_item_name can be MESSAGE_TEXT, MYSQL_ERRORNO, CURSOR_NAME , etc.The following stored mysql stored procedure procedure adds an order line item into an existing sales order. It issues an error message if the order number does not exist. DELIMITER $$ CREATE PROCEDURE AddOrderItem( in orderNo int, in productCode varchar(45), in qty int, in price double, in lineNo int ) BEGIN DECLARE C INT; SELECT COUNT(orderNumber) INTO C FROM orders WHERE orderNumber = orderNo; -- check if orderNumber exists IF(C != 1) THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Order No not found in orders table'; END IF; -- more code below -- ... END1234567891011121314151617181920212223DELIMITER $$CREATE PROCEDURE AddOrderItem( in orderNo int, in productCode varchar(45), in qty int, in price double, in lineNo int )BEGIN DECLARE C INT; SELECT COUNT(orderNumber) INTO C FROM orders WHERE orderNumber = orderNo; -- check if orderNumber exists IF(C != 1) THEN SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Order No not found in orders table'; END IF; -- more code below -- ...ENDFirst, it counts the orders with the input order number that we pass to the stored procedure.Second, if the number of order is not 1, it raises an error with SQLSTATE 45000 along with an error message saying that order numb