I am trying to set up a TRIGGER to clear empty strings before INSERT. Not rocket science but I can't find the error in my syntax!
Here is the TRIGGER itself
USE `ga_abtest_logging`;
DELIMITER $$
CREATE TRIGGER avoid_empty
BEFORE INSERT ON daily_analytics
FOR EACH ROW
BEGIN
IF profileID = ''
THEN SET profileID = NULL
END IF;
END$$
Here is what workbench is showing:
On hover over the END IF it reads syntax error, unexpected END, expecting ';'
Could I have a problem with the settings on my DB? I have gone through the MySQL docs and I think the trigger looks right! Does anyone see anything obviously wrong?
You should make a few changes:
Use the NEW. prefix when referencing a column value
Add a semi-colon at the end of the line where you set the value
For example:
DELIMITER $$
CREATE TRIGGER tr_b_ins_daily_analytics BEFORE INSERT ON daily_analytics FOR EACH ROW BEGIN
IF (NEW.profileID = '')
THEN
SET NEW.profileID = NULL;
END IF;
END $$
DELIMITER ;
The code below should work.
DELIMITER $$
CREATE TRIGGER avoid_empty
BEFORE INSERT ON daily_analytics
FOR EACH ROW
BEGIN
IF NEW.profileID = ''
THEN SET NEW.profileID = NULL;
END IF;
END;$$
DELIMITER ;
Related
I have a problem with trigger.. I would like to change a value to false if new returnBike is not null.
CREATE TRIGGER returnBikeTrigger
AFTER UPDATE ON Rent
FOR EACH ROW
IF (NEW.returnBike <> null) THEN
UPDATE Bike SET isRented = false
WHERE id = (select Bike from Rent); -- but there is Error (missing semicolon)
END IF;
Any advice?
I would be inclined to just do:
DELIMITER $$
CREATE TRIGGER returnBikeTrigger
AFTER UPDATE ON Rent
FOR EACH ROW
BEGIN
UPDATE Bike
SET isRented = false
WHERE id = new.Bike AND NEW.returnBike IS NOT NULL;
END; $$
DELIMITER ;
DELIMITER $$
CREATE TRIGGER returnBikeTrigger
AFTER UPDATE ON Rent
FOR EACH ROW
BEGIN
IF (NEW.returnBike IS NOT NULL) THEN
UPDATE BikeSET isRented = false
WHERE id = new.Bike;
END IF;
END; $$
DELIMITER ;
so to remove problem with syntax semicolon added delimiter and $$ after end;
Anyway thanks to give me some advice with if, comparing!
i have written a trigger in mysqlworkbench that should update the product stock after a new line had been added to the order table(my code is in dutch so thats why im explaining this) But it doesn't work, when i try to apply it mysqlworkbench says its sql code contains errors.
Here's the trigger:
CREATE DEFINER = CURRENT_USER TRIGGER `winkel`.`bestelregel_AFTER_INSERT` AFTER INSERT ON `bestelregel` FOR EACH ROW
BEGIN
if Product.productnr = NEW.productnr
then
Update Product
Set Hoeveelheid = (Hoeveelheid - NEW.aantal)
Where productnr = NEW.productnr;
end if;
END
What is Product in the if statement? That is, no doubt, generating a syntax error, because it is unrecognized.
I think you intend for the body to be simply:
Update Product p.
Set Hoeveelheid = (Hoeveelheid - NEW.aantal)
Where p.productnr = NEW.productnr;
The if irrelevant.
I would expect the full version to look something like:
DELIMITER $$
CREATE DEFINER = CURRENT_USER TRIGGER `winkel`.`bestelregel_AFTER_INSERT`
AFTER INSERT ON `bestelregel` FOR EACH ROW
BEGIN
UPDATE Product p
SET Hoeveelheid = (Hoeveelheid - NEW.aantal)
WHERE p.productnr = NEW.productnr;
END $$
DELIMITER ;
You have delimiter trouble. You need
DELIMITER $$
CREATE ..... TRIGGER ...
BEGIN
END$$
DELIMITER ;
Following is the trigger I've written :
CREATE TRIGGER `test_BINS` BEFORE INSERT ON `phpfox_user` FOR EACH ROW
IF new.`full_name` = '' THEN SET new.`full_name` = NULL; END IF; END;
Following is the screen shot of the same:
Following is the image of error message that came :
Please somebody help me in adding this trigger.
DELIMITER $$
CREATE TRIGGER test_BINS BEFORE INSERT ON phpfox_user
FOR EACH ROW BEGIN
IF (NEW.full_name = '') THEN
SET NEW.full_name = NULL;
END IF;
END$$
DELIMITER ;
but if you want to add it using pma-interface, just place there this definition:
BEGIN
IF (NEW.full_name = '') THEN
SET NEW.full_name = NULL;
END IF;
END
The message is clear here. Whatever is present in the line 1 of your first image is not needed, as the information is already provided above.
Technically, your code tries to create a trigger inside another trigger. Remove the line 1 and it will be fine.
This should be the query:
FOR EACH ROW IF :new.full_name = '' THEN :new.full_name := NULL; END IF; END;
I am trying to create a trigger to insert a new row conditionally based on an insert on another table...I can't seem to nail the syntax.
Here is what I have thus far:
DELIMETER $$
CREATE TRIGGER overPricedCar
AFTER INSERT ON cars
FOR EACH ROW
BEGIN
IF (new.sellPrice > '80000' )THEN
INSERT INTO listings VALUES(new.carName,'GOLD','0',' ');
END IF;
END$$
DELIMETER ;
For some reason I keep getting an error, they syntax seems to be OK, I'm not sure where I may have gone wrong.
EDIT
After correcting the typo, the trigger 'works'.
I have added a comment to be output when the trigger happens.
I have tested it, and the output message gets printed to the screen but the trigger does not actually complete the inserts:
DELIMITER $$
CREATE TRIGGER overPricedCar
BEFORE INSERT ON cars
FOR EACH ROW
BEGIN
IF (new.sellPrice > '80000' )THEN
INSERT INTO listings VALUES(new.carName,'GOLD','0',' ');
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = "New Gold car!"; // this line throws it off
END IF;
END$$
DELIMITER ;
Where can I place the messages I want to be printed to the screen when this trigger runs?
Typo:
DELIMETER
^--- should be an I: DELIMITER
I hav a table with several fields. One field is "date_assigned" and the other is "assigned". "date_assigned" has a datatype of timestamp and can be null. "assigned" has a datatype of tinyint and the values are either 0 (default; 'not assigned') or 1 ('assigned').
I would like to create a trigger that would automatically update the "assigned" value to 1 when "date_assigned" is updated with a value (is not null).
I've used triggers before, but have not used them in conjunction with checking if a value is null. I'm unclear on the syntax, so any help would be appreciated. So far, I've tried:
DELIMITER $$
CREATE
TRIGGER `<database>`.`<trigger_name>` AFTER UPDATE
ON `<database>`.`<table>`
FOR EACH ROW BEGIN
IF(NEW.date_assigned IS NOT NULL) THEN
UPDATE <table> SET assigned = '1';
END$$
DELIMITER ;
I just get Error Code: 1064. I looked upo the code, and it appears that it's a syntax error. So what syntax mistake am I making, and is this even the correct 'grammar'?
Try putting BEGIN in a new line as follows.
DELIMITER $$
CREATE
TRIGGER `<database>`.`<trigger_name>` AFTER UPDATE
ON `<database>`.`<table>`
FOR EACH ROW
BEGIN
IF(NEW.date_assigned IS NOT NULL) THEN
UPDATE <table> SET assigned = '1';
END; //Change here also.
$$
DELIMITER ;
This is because of default delimiter in MySQL set to ;. So, the first line should look like DELIMITER $$;
DELIMITER $$;
CREATE TRIGGER `<database>`.`<trigger_name>`
AFTER UPDATE ON `<database>`.`<table>`
FOR EACH ROW BEGIN
IF(NEW.date_assigned IS NOT NULL) THEN
UPDATE <table> SET assigned = '1';
END$$
DELIMITER ;