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 ;
Related
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 ;
I created a simple trigger as below:
CREATE TRIGGER `trigger_update_rche_prep` BEFORE UPDATE ON `rche_prep`
FOR EACH ROW
SET NEW.case_number = 'ABC';
Which is working, when I want to add the BEGIN...END syntax to it, like below:
CREATE TRIGGER `trigger_update_rche_prep` BEFORE UPDATE ON `rche_prep`
FOR EACH ROW
BEGIN
SET NEW.case_number = 'ABC';
END;
It fails, I have no idea why this will happen, can anyone help?
Try this:
DELIMITER //
CREATE TRIGGER `trigger_update_rche_prep` BEFORE UPDATE ON `rche_prep`
FOR EACH ROW
BEGIN
SET NEW.case_number = 'ABC';
END;//
DELIMITER ;
I am using version 5.0 of mysql.
I'm trying to create a trigger to check if one entry(name of Food) exists in the other table.
I´ve done this:
delimiter //
CREATE TRIGGER verifyExists BEFORE INSERT ON Sold
FOR EACH ROW
BEGIN
IF NEW.nameF not in (
select A.nameF
From Available D
where (NEW.nameF = A.nameF and NEW.nameR = A.nameR)
)
END IF;
END;
//
delimiter ;
this doesen't work, why?
You have a couple of errors:
delimiter //
CREATE TRIGGER verifyExists BEFORE INSERT ON Sold
FOR EACH ROW
BEGIN
IF NEW.nameF not in (
select A.nameF
From Available A -- CHANGED THE ALIAS TO A
where (NEW.nameF = A.nameF and NEW.nameR = A.nameR)
) THEN -- MISSING THEN
CALL `Insert not allowed`;
END IF;
END;
//
delimiter ;
sqlfiddle demo
If you could use SIGNAL, it is the best way, but since it was only introduced in mysql 5.5, you will have to do it by other route. One way is to call a non existant function, like showed above. From this answer
I am attempting to create a trigger to update quantities between 2 separate databases. This query runs successfully, but when I show triggers in mysql, it brings up an empty set. Any help would be much appreciated.
delimiter $$ CREATE TRIGGER `quantity_to_clb` AFTER UPDATE ON product
FOR EACH ROW BEGIN UPDATE cl_boutique.product AS clb
LEFT JOIN cherrylane.product AS cl
ON clb.model = cl.code SET clb.quantity = cl.available
WHERE clb.model = cl.code
END $$
delimiter ;
That's because your code has two synax errors:
delimiter $$ --delimiter statements need to be on separate lines
CREATE TRIGGER `quantity_to_clb` AFTER UPDATE ON product
FOR EACH ROW BEGIN
UPDATE cl_boutique.product AS clb
LEFT JOIN cherrylane.product AS cl
ON clb.model = cl.code SET clb.quantity = cl.available
WHERE clb.model = cl.code; -- ; was needed here
END $$
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 ;