How to throw an error in MySql procedure?

2022-12-11 19:11:34

http://*.com/questions/4862911/how-to-throw-an-error-in-mysql-procedure

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 -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

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asked Feb 1 '11 at 13:06

How to throw an error in MySql procedure?

Arman

1,89652952

also read this chapter docstoc.com/docs/687360/Error-Handling-In-Stored-Procedure – Haim Evgi Feb 1 '11 at 13:11

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2 Answers

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up vote7down voteaccepted

Yes, there is: use the SIGNAL keyword.

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edited Sep 2 '14 at 16:52

Air

3,75212446

answered Feb 1 '11 at 13:20

Halasy

861

Thank you! DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET err= 1 exactly that what I need!!! – Arman Feb 2 '11 at 11:11

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up vote5down 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');

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2 Answers

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