Using MySQL55 on MySQLWorkbench 6.2 for Windows,
DROP TRIGGER IF EXISTS `maxBBLimit`;
CREATE TRIGGER `maxBBLimit`
AFTER UPDATE ON locationobject
FOR EACH ROW
IF locationobject.boxLowY > 1000 THEN CALL RaiseException();
END IF;
Assuming that locationobject has a unsigned int variable called boxLowY that only allows values between 0 and 1000, and if it is above this range, it calls RaiseException().
My workspace refuses to compile because of these errors:
17:43:40 CREATE TRIGGER `maxBBLimit` AFTER UPDATE ON locationobject FOR EACH ROW IF locationobject.boxLowY > 1000 THEN CALL RaiseException() 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 '' at line 4 0.000 sec
^ This one has a red squiggle under ) after RaiseException(
17:43:40 ; END IF 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 '; END IF' at line 1 0.000 sec
^ This one has a red squiggle under END in the END IF statement;
Anyone have any suggestions how to get this code to compile?
Triggers definitions should be surrounded by delimiter statements.
In addition, you refer to the table for the trigger using new. And, you want a before update trigger. If you fail after the update, the bad value will still go into the database. And, you normally use signal to return an error. So, if I haven't missed anything:
DELIMITER $$
DROP TRIGGER IF EXISTS `maxBBLimit` $$
CREATE TRIGGER `maxBBLimit`
AFTER UPDATE ON locationobject
FOR EACH ROW
IF new.boxLowY > 1000 THEN
SIGNAL SQLSTATE '4500' SET MESSAGE_TEXT = 'boxLowY out of range';
END IF$$
DELIMITER ;
Related
This is my first time trying to create a MySql trigger but I'm running into syntax errors that I can't identify. I am trying to have the trigger insert a calculated value when a row is updated. Below is my code, but I keep getting syntax errors when I try to execute it, and I cannot see where the error is. Can someone please look, what am I doing wrong?
DROP TRIGGER ins_cop_dhw;
CREATE TRIGGER ins_cop_dhw BEFORE INSERT ON `2017010001_data`
FOR EACH ROW
BEGIN
IF (NEW.`_007E` = 1 AND `_00A2` > 0) THEN
SET NEW.`_00B7` = NEW.`_0096` / NEW.`_00A2`;
END IF;
IF (NEW.`_007D` = 1 AND `_00A2` > 0) THEN
SET NEW.`_00B8` = (NEW.`_0096` / NEW.`_00A2`);
END IF;
END;
Here is the error I get in MySQL Workbench, but it's not much help. :/
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 '' at line 5
MySQL Workbench highlights the end of line 6 as the start of the syntax error.
As said by #Akina I was missing the delimiter statements. Here is fixed code.
delimiter //
DROP TRIGGER ins_cop_dhw;
CREATE TRIGGER ins_cop_dhw BEFORE INSERT ON `2017010001_data`
FOR EACH ROW
BEGIN
IF (NEW.`_007E` = 1 AND NEW.`_00A2` > 0) THEN
SET NEW.`_00B7` = NEW.`_0096` / NEW.`_00A2`;
END IF;
IF (NEW.`_007D` = 1 AND NEW.`_00A2` > 0) THEN
SET NEW.`_00B8` = (NEW.`_0096` / NEW.`_00A2`);
END IF;
END//
delimiter ;
As per the advice of #Akina I read the Create Procedure documentation from the dev.mysql.com site and the below quote highlighted the importance of using delimiter
The example uses the mysql client delimiter command to change the statement delimiter from ; to // while the procedure is being defined. This enables the ; delimiter used in the procedure body to be passed through to the server rather than being interpreted by mysql itself. See Section 25.1, “Defining Stored Programs”.
I want to add a trigger in my database in phpmyadmin to rollback an insertion into the table if a particular attribute is greater than 100.
Here is my code that I wrote in the window for define in the "Add Trigger" window:
BEGIN
ROLLBACK IF NEW.max_allowed > 100
END;
I am getting this error:
MySQL said: #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 'IF NEW.max_allowed > 100 END' at line 2
Can someone please suggest what I'm missing?
ROLLBACK can't be used together with IF in the same statement.
Check the documentation.
I suggest this code for your trigger:
BEGIN
IF NEW.max_allowed > 100 THEN
ROLLBACK;
END IF;
END;
i'm trying to create a trigger on my database but i'm getting this error "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 " but i can't understand why. This is the query:
CREATE TRIGGER cancella_associativa AFTER DELETE ON libro
FOR EACH ROW
BEGIN
DELETE FROM annuncio_autore
WHERE libro.`idLibro` = annuncio_autore.`idAnnuncio`;
END
Using phpMyAdmin, thanks in advance.
The ; after the line that contains WHERE ends your (incomplete) CREATE TRIGGER query. You need to change the delimiter:
delimiter //
CREATE TRIGGER ... //
delimiter ;
For more information see MySQL manual.
When I try and run my table/trigger creation script, I get the following error:
ERROR 1064 (42000) at line 19: 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 'SET NEW.fines_remaining = NEW.total_fines;
END IF;
END' at line 5
The following is the CREATE TRIGGER code which is causing the error:
DELIMITER //
CREATE TRIGGER fines_trigger BEFORE INSERT ON student
FOR EACH ROW
BEGIN
IF TUPLE.fines_remaining > TUPLE.total_fines
SET NEW.fines_remaining = NEW.total_fines;
END IF;
END; //
DELIMITER ;
I can't figure out why this is happening, I feel like the syntax is fine, but it's obviously not since there's some error being thrown.
EDIT: Immediately after posting this I notice that I still have these TUPLE 'variables' that I was using before I figured out about 'OLD' and 'NEW'. I'm changing them and will update momentarily.
You are missing then after the if condition
DELIMITER //
CREATE TRIGGER fines_trigger BEFORE INSERT ON student
FOR EACH ROW
BEGIN
IF new.fines_remaining > old.total_fines then
SET NEW.fines_remaining = NEW.total_fines;
END IF;
END; //
DELIMITER ;
Also I have changed TUPLE with new and old in the above trigger, you may need to adjust the logic as per your need.
DELIMITER ||
CREATE TRIGGER `monthly_insert` BEFORE INSERT ON `history_monthly`
FOR EACH ROW
BEGIN
NEW.`uid` = CONCAT(OLD.`year`, OLD.`month`, OLD.`charactersId`);
END;
||
DELIMITER ;
And it returns an 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 '.`uid` = CONCAT(OLD.`year`, OLD.`month`, OLD.`charactersId`);
END' at line 4
It's my first time with triggers and I was doing my best to try to find soultion but I failed ;<
You need to add the word SET in this line:
SET NEW.`uid` = CONCAT(OLD.`year`, OLD.`month`, OLD.`charactersId`);
Also, as the commenter pointed out, there is no OLD value in a BEFORE INSERT trigger.