Trigger for comparing login name in mysql 5.1

Question

Right now it is giving me a 1064 error at the elseif. This is my first time creating a trigger in 5.1. I am not sure the version i used before, but I was successful using that one.

DROP TRIGGER IF EXISTS greentrucks.iCustomer;
DELIMITER GO
CREATE TRIGGER greentrucks.iCustomer AFTER INSERT
ON customer 
For each ROW BEGIN 

DECLARE count int;
SET @count = FOUND_ROWS();
If @count = 0
THEN LEAVE

ELSEIF EXISTS ( SELECT *
            FROM INSERTED i
            WHERE  EXISTS (
            SELECT p.email
            FROM greentrucks.customer p
            WHERE i.email = p.email))

THEN BEGIN
    RAISERROR('That Email is already in use!',16,1);
    IF @@Trancount >0
        ROlLBACK TRANSACTION;
END IF
END IF
END
GO
DELIMITER ;

Answer 1

LEAVE needs a label. See the LEAVE documentation and the sample in the LOOP documentation. Also, you need to terminate your LEAVE statement with a semicolon.

MySQL doesn't appear to have any official examples for LEAVE within a trigger. This blog post puts the label right before the BEGIN. Based on that, try something like this:

DROP TRIGGER IF EXISTS greentrucks.iCustomer;
DELIMITER GO
CREATE TRIGGER greentrucks.iCustomer AFTER INSERT
ON customer 
For each ROW
my_label: BEGIN

DECLARE count int;
SET @count = FOUND_ROWS();
If @count = 0
THEN LEAVE my_label;

... and the rest of your code