I'm trying to create a SQL Trigger, but i receive always an error message, i want to check on update and insert operation if value called status is not higher than 1 and not lower than 0.
CREATE TRIGGER tr_ins_cert_login
BEFORE UPDATE ON cert_login
FOR EACH ROW
BEGIN
DECLARE errorMessage VARCHAR(255);
SET errorMessage('Invalid Status Value.');
IF new.status <> 0 AND new.status <> 1 THEN
SET MESSAGE_TEXT = errorMessage;
END IF;
END
When i try to run the commands it returns error.
I'm using MySql.
The 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 '' at line 5
Any hint?
Message_text should be part of signal sqlstate following syntaxes on my box
drop trigger if exists t;
delimiter $$
CREATE TRIGGER t
BEFORE UPDATE ON cert_login
FOR EACH ROW
BEGIN
DECLARE errorMessage VARCHAR(255);
SET errorMessage = ('Invalid Status Value.');
IF new.status <> 0 AND new.status <> 1 THEN
SIGNAL SQLSTATE '01000'
SET MESSAGE_TEXT = errorMessage;
END IF;
END $$
delimiter ;
and https://www.db-fiddle.com/f/913nweKrHqXL5SViuuqAZE/0
ps your first set statement is invalid you missed the =
Related
I'm attempting to create a trigger to abort writing a new record for a library database if the book in question has already been loaned out. Here's what I have so far:
CREATE TRIGGER OnlyOneBorrowerAtATime
BEFORE INSERT ON Transaction
FOR EACH ROW
BEGIN
IF (EXISTS ( SELECT * FROM Transaction
WHERE NEW.bookId = Transaction.bookId AND Transaction.transType = 'Loaned'))
THEN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = 'Book has not been returned';
END IF;
END;
I get the following error back from MariaDB:
SQL Error (1064): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '' at line 9
MariaDB version is 10.5.9.
Add a DELIMITER to your query like
DELIMITER $$
CREATE TRIGGER OnlyOneBorrowerAtATime
BEFORE INSERT ON Transaction
FOR EACH ROW
BEGIN
IF (EXISTS ( SELECT * FROM Transaction
WHERE NEW.bookId = Transaction.bookId AND Transaction.transType = 'Loaned'))
THEN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = 'Book has not been returned';
END IF;
END$$
DELIMITER ;
When running this:
DELIMITER $$
CREATE TRIGGER tr_test BEFORE UPDATE ON test
FOR EACH ROW
BEGIN
DECLARE EXIT HANDLER FOR SQLSTATE '45000';
DECLARE EXIT HANDLER FOR SQLSTATE '23000';
IF(older_record(NEW.last_action_timestamp, OLD.last_action_timestamp)) THEN
SET #rowhash = (SELECT MD5(NEW));
INSERT INTO test_db.test_table SELECT NEW.*, #rowhash;
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'old record';
END IF
END
$$
DELIMITER ;
I get the following Error Message :
You have an error in your SQL syntax; check the manual that corresponds to your >MariaDB server version for the right syntax to use near ';
DECLARE EXIT HANDLER FOR SQLSTATE '23000';
IF(older_record(NEW.l' at line 4
A DECLARE statement must be followed by a "statement" -- see https://dev.mysql.com/doc/refman/5.6/en/declare-handler.html
Perhaps all you want is
BEGIN END;
Apparently an "empty statement" is not allowed?
With the following sql code:
CREATE TRIGGER yirmi_test BEFORE UPDATE ON `orders`
FOR EACH ROW
IF ((OLD.`product_price_currency` != "") AND (NEW.`product_price_currency` = "")) THEN
signal sqlstate '45000' set message_text = 'Erasing currency';
END IF;
I get the following 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 '' at line 4
I think you are fine. Just wrap with the following begin and end delimiter block. It passed a 1064 test for me:
DELIMITER $$
CREATE TRIGGER yirmi_test BEFORE UPDATE ON `orders`
FOR EACH ROW
IF ((OLD.`product_price_currency` != "") AND (NEW.`product_price_currency` = "")) THEN
signal sqlstate '45000' set message_text = 'Erasing currency';
END IF;
$$
DELIMITER ;
Read the bottom of This concerning delimiters. It is trivial, but it can waste hours.
I am trying this trigger but it keeps giving me this error:
Trigger
DELIMITER $$
CREATE
TRIGGER entries_limit_trigger
BEFORE INSERT ON Feed
FOR EACH ROW
BEGIN
Set #counts=(SELECT count(*) from Feed);
IF (#counts > 10000)
THEN
PRINT 'INSERTED SUCCESS';
END IF;
END
$$
DELIMITER ;
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 ''INSERTED SUCCESS'; END IF; END' at line 9
If you want the trigger to exit with a message you can do:
CREATE
TRIGGER entries_limit_trigger
BEFORE INSERT ON Feed
FOR EACH ROW
BEGIN
Set #counts=(SELECT count(*) from Feed);
IF #counts > 10000 THEN
set #msg = "Reached the limit";
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = #msg;
END IF;
END;
sqlfiddle demo
To make it exit with a message, just add another insert to the fiddle.
My proposed trigger:
#START TRIGGER
delimiter //
DECLARE msg VARCHAR(255);
CREATE TRIGGER passStandard_check BEFORE INSERT ON Module
FOR EACH ROW
BEGIN
IF NEW.passStandard < 0 || NEW.passStandard > 1 THEN
set msg = concat('Trigger Error: Pass Standard: ', cast(NEW.passStandard as char));
signal sqlstate '45000' set message_text = msg;
END
//
delimiter ;
#END TRIGGER
But I get the following error:
Error Code: 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 'DECLARE msg VARCHAR(255); CREATE TRIGGER passStandard_check BEFORE INSERT ON Mod' at line 1
Adding in END IF does not make any difference.
passStandard is set to an INT NOT NULL.
Edit
I've moved the DECLARE statement after the BEGIN:
#START TRIGGER
delimiter //
CREATE TRIGGER passStandard_check BEFORE INSERT ON Module
FOR EACH ROW
BEGIN
DECLARE msg VARCHAR(255);
IF NEW.passStandard < 0 || NEW.passStandard > 1 THEN
set msg = concat('Trigger Error: Pass Standard: ', cast(NEW.passStandard as char));
signal sqlstate '45000' set message_text = msg;
END IF;
END
//
delimiter ;
#END TRIGGER
But I still get this error:
Error Code: 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 'sqlstate '45000' set message_text = msg; END IF; END' at line 7
You need to declare your variable "msg" inside your procedure and use END IF
#START TRIGGER
delimiter //
CREATE TRIGGER passStandard_check BEFORE INSERT ON Module
FOR EACH ROW
BEGIN
DECLARE msg VARCHAR(255); /* << PUT THIS HERE */
IF NEW.passStandard < 0 || NEW.passStandard > 1 THEN
set msg = concat('Trigger Error: Pass Standard: ', cast(NEW.passStandard as char));
signal sqlstate '45000' set message_text = msg;
END IF; /* << YOU WILL NEED THIS TOO (DONT FORGET THE SEMICOLON :D) */
END//
delimiter ;
#END TRIGGER
I noticed that I was getting MySQL warnings when adding triggers with IF/ELSE logic in them if I wasn't adding parentheses to the IF statements. Not sure why, but I added the brackets and the warnings went away. Try something like:
IF ((NEW.passStandard < 0) || (NEW.passStandard > 1)) THEN
set msg = concat('Trigger Error: Pass Standard: ', cast(NEW.passStandard as char));
signal sqlstate '45000' set message_text = msg;
END IF;
Try breaking it up to several queries. Or run it in phpmyadmin which handles semi colon separated multi queries.
Might be this:
DECLARE is permitted only inside a BEGIN ... END compound statement and must be at its start, before any other statements.
http://dev.mysql.com/doc/refman/5.0/en/declare.html
i got it working. pls find below the working code.
delimiter //
CREATE TRIGGER test_check1 BEFORE INSERT ON employee
FOR EACH ROW
BEGIN
DECLARE msg VARCHAR(255);
IF (NEW.sync_id = '0') THEN
SET NEW.name = 'Collect Money';
signal sqlstate '45000' set message_text = msg;
END IF;
END//
delimiter ;