MYSQL- 存储过程示例

　　最近需要用到MYSQL，没耐心从头到尾，慢慢了解了，需要什么直接百度，直接了解，从实战中学习。

　　看一下MYSQL存储过程的示例：

CREATE PROCEDURE plogin
(
    p_username char(15),
    p_password char(32),
    p_ip char(18),
    p_logintime datetime
)
LABEL_PROC:
BEGIN    

    DECLARE v_uid mediumint(8);
    DECLARE v_realpassword char(32);
    DECLARE v_nickname varchar(30);
    DECLARE v_oltime smallint(6);      

    SELECT u.uid, u.password, f.nickname, u.oltime INTO v_uid, v_realpassword, v_nickname, v_oltime
    FROM cdb_members u INNER JOIN cdb_memberfields f ON f.uid = u.uid WHERE u.username = p_username;   

    IF (v_uid IS NULL) THEN
        SELECT 2 AS ErrorCode;
        LEAVE LABEL_PROC;
    END IF;

    IF (p_password <> v_realpassword) THEN
        SELECT 3 AS ErrorCode;
        LEAVE LABEL_PROC;
    END IF;

    UPDATE ipsp_userexpands SET lastloginip = p_ip, lastlogintime = p_logintime WHERE uid = v_uid;

    SELECT 0 AS ErrorCode, v_uid AS uid, v_nickname AS nickname, v_oltime AS oltime;

END LABEL_PROC //

　　调用示例是 call plogin('参数1‘,'参数2','参数3','参数4');