基于百万数据集的登录存储过程

 1 BEGIN
 2     #Routine body goes here...
 3 
 4     set @gid = 0;
 5     set @user_name=‘‘;
 6     set @_result = ‘login success‘;
 7     SELECT id,user_name into @gid,@user_name from user_sys WHERE user_name=_user_name and user_pwd=_user_pwd limit 1;
 8 
 9     if @gid=0 THEN  #登录不成功
10         set @_result = ‘login error‘;
11     end if;
12         SELECT * from (SELECT @_result as _result) a,(SELECT @gid,@user_name) b;  #不管正确还是错误，都有结果返回
13 
14 END