Question

我面临一个奇怪的问题。我在php中使用mysqli extension并在mysql中调用一个存储函数，它在表中插入了一些值，我将user_id字段留空，因为它是自动递增的，但插入查询失败说明我不知道t有一个user_id的默认值，它已经是一个自动增量字段。我发布了存储的函数。

-- --------------------------------------------------------------------------------
-- Routine DDL
-- Note: comments before and after the routine body will not be stored by the server
-- --------------------------------------------------------------------------------
DELIMITER $$

CREATE FUNCTION `ideaforum`.`login_handler` (
login                  ENUM('facebook','twitter','google','local'),
firstname              VARCHAR(40),
middlename             VARCHAR(40),
lastname               VARCHAR(40),
gender                 ENUM('male','female'),
emailid                VARCHAR(50),
remoteid               VARCHAR(70)
)
RETURNS INT

BEGIN
    DECLARE user_exists INT DEFAULT NULL;

    DECLARE CONTINUE HANDLER FOR SQLSTATE '02000'
    SET user_exists = FALSE;

    SELECT user_id FROM user WHERE email=emailid 
    INTO user_exists;

    IF user_exists = FALSE THEN
        INSERT INTO user
            (login_type,first_name,middle_name,last_name,gender,email,remote_id)
        VALUES
            (login,firstname,middlename,lastname,gender,emailid,remoteid);

        INSERT INTO contact
            (contact_type,contact_details)
        VALUES("email",emailid);

        SELECT user_id FROM user WHERE email = emailid INTO user_exists;
        RETURN(user_exists);
    ELSE
        RETURN(user_exists);
    END IF;

END

Answer 1

错误可能是由第二个插入查询引起的。在select之后移动它并将其更改为：

INSERT INTO contact (
    user_id, contact_type, contact_details
) VALUES (
    user_exists, "email", emailid
);

（或类似的东西，基于您的确切表结构。）

Mysql请求自动递增的主键字段的默认值

1 个答案: