日期:2014-05-16 浏览次数:20654 次
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1. 为了测试触发器和存储过程,首先建立一张简单的表:
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CREATE TABLE `airuser` (
? `userId` int(11) NOT NULL AUTO_INCREMENT,
? `username` varchar(128) NOT NULL,
? PRIMARY KEY (`userId`)
)ENGINE=InnoDB DEFAULT CHARSET=utf8
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2. 为该表的插入操作,创建一张记录表:
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CREATE TABLE `airuser_record` (
? `id` int(11) NOT NULL AUTO_INCREMENT,
? `username` varchar(45) DEFAULT NULL,
? `edittime` timestamp NULL DEFAULT NULL,
? `edittype` varchar(45) DEFAULT NULL,
? PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
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3. 编写一个插入操作的触发器:
DROP TRIGGER insert_trigger;
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delimiter |
CREATE TRIGGER insert_trigger BEFORE INSERT ON airuser
FOR EACH ROW BEGIN
INSERT INTO airuser_record SET username = NEW.username, edittime=now(), edittype='insert';
END;
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SHOW TRIGGERS;
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4. 为批量插入编写存储过程:
DROP procedure createUsers;
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delimiter |
create procedure createUsers(IN count int)
begin
declare i int;
set i=0;
while i<count do
insert into airuser set username=concat('user_',i);
set i=i+1;
end while;
end;
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show procedure status;
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5. 调用存储过程,验证存储过程是工作的,并验证在插入记录前,触发器能正确被触发:
call createUsers(10);
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6. 最后通过插入记录表再次验证:
SELECT * FROM mars_jpa.airuser_record;