MySQL: Trigger in wrong schema [closed]

问题

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Closed 5 years ago.

delimiter //
CREATE TRIGGER `range` BEFORE INSERT ON touristCompany.hotels
FOR EACH ROW 
    BEGIN
        IF NEW.star >5 THEN
            SET NEW.star = 5;
        ELSEIF NEW.star < 1 THEN
            SET NEW.star = 1;
        END IF;

    END;//
delimiter ;

回答1:

You need to create the trigger within the same schema/database where the insert operation is happening. From your trigger definition it's obvious that trigger operation will be under touristCompany database. Make sure you are creating the trigger under same database.

Modify your trigger definition like below

delimiter //
CREATE TRIGGER `touristCompany`.`range` 
BEFORE INSERT ON `touristCompany`.`hotels`
FOR EACH ROW 
    BEGIN
        IF NEW.star > 5 THEN
            SET NEW.star = 5;
        ELSEIF NEW.star < 1 THEN
            SET NEW.star = 1;
        END IF;

    END;//
delimiter ;

(OR) Select the database before creating trigger

USE `touristCompany`;

delimiter //
CREATE TRIGGER `range` ...
<rest of code here>

来源：https://stackoverflow.com/questions/26735010/mysql-trigger-in-wrong-schema