e_msg_c_as_register_req-注册存储过程

TOP:BEGIN
    #Routine body goes here...

IF EXISTS
(
SELECT * FROM `global_account`
WHERE `plantform_id` = in_plantform_id
    AND `plantform_sub_id` = in_plantform_sub_id
    AND `account` = in_account
) THEN
        SELECT -1 AS RET;
        LEAVE TOP;
END IF;

INSERT INTO `global_account` SET
`plantform_id` = in_plantform_id,
`plantform_sub_id` = in_plantform_sub_id,
`account` = in_account,
`password` = in_password,
`register_time` = NOW()
;

SELECT 0 AS RET, LAST_INSERT_ID() AS user_id;

END

将这个存储过程解释一下

IF EXISTS()其实看select能不能有数据，如果有数据就是true否则就是false

 LEAVE TOP;就是从存储过程返回，这个TOP是自己加上去的，默认是没有的

SELECT 0 AS RET, LAST_INSERT_ID() AS user_id;结果集，RET就是返回结果，一般MySQL0是表示成功，LAST_INSERT_ID()表示上一条insert插入的id，将这两个值作为存储过程的返回值。

BEGIN
    #Routine body goes here...
DECLARE var_user_id INT DEFAULT NULL;
DECLARE var_password VARCHAR(255) DEFAULT "";

SELECT `user_id`, `password` INTO var_user_id, var_password FROM `global_account`
WHERE `plantform_id` = in_plantform_id
    AND `plantform_sub_id` = in_plantform_sub_id
    AND `account` = in_account
  #AND `password` = in_password
;

IF ISNULL(var_user_id) THEN #没有这个用户时
    INSERT INTO `global_account`
    SET `plantform_id` = in_plantform_id,
            `plantform_sub_id` = in_plantform_sub_id,
            `account` = in_account,
            `password` = in_password,
            `register_time` = NOW()
    ;

    SELECT 0 AS RET, LAST_INSERT_ID() AS user_id;
ELSE
    IF var_password = in_password THEN
        SELECT 0 AS RET, var_user_id AS user_id;
    ELSE
        SELECT -1 AS RET;
    END IF;
END IF;

END