觸發比較登錄名在MySQL 5.1

Question

現在它給我一個1064錯誤在elseif。這是我第一次在5.1中創建觸發器。我不確定我以前使用過的版本，但我成功地使用了該版本。

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需要標籤。請參閱LEAVE documentation和sample in the LOOP documentation。此外，您需要用分號終止您的LEAVE聲明。

MySQL在觸發器中似乎沒有任何LEAVE的官方示例。 This blog post將標籤放在BEGIN之前。基於此，請嘗試如下所示：

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