Question

如果我运行以下代码，但用"SELECT * FROM User LIMIT 1"替换'CALL'，我会找回一个用户。如果我切换到调用存储过程，我会一直收到此错误：

panic: Error 1312: PROCEDURE MobiFit_Dev.User_ByEmail can't return a result set in the given context [recovered]
    panic: Error 1312: PROCEDURE MobiFit_Dev.User_ByEmail can't return a result set in the given context

如何拨打我的SP？

这是我的SP：

DELIMITER $$

USE `MobiFit_Dev`$$

DROP PROCEDURE IF EXISTS `User_ByEmail`$$

CREATE DEFINER=`root`@`localhost` PROCEDURE `User_ByEmail`(pEmail VARCHAR(250))
BEGIN
    SELECT 
        * 
    FROM
        `User` 
    WHERE `Email` = pEmail ;
END$$

DELIMITER ;

包裹实体

import (
    "database/sql"
    "fmt"
    "github.com/go-sql-driver/mysql"
    "mobifit/db"
    // "time"
)

const (
    Male   = "Male"
    Female = "Female"
)

type User struct {
    Id             sql.NullInt64
    Email          sql.NullString
    HashedPassword sql.NullString
    RoleId         sql.NullInt64
    FirstName      sql.NullString
    LastName       sql.NullString
    Gender         sql.NullString
    DateOfBirth    mysql.NullTime
    Height         sql.NullFloat64
    CurrentWeight  sql.NullFloat64
    CreatedAt      mysql.NullTime
    ConfirmedAt    mysql.NullTime
    LastActivityAt mysql.NullTime
    DeletedAt      mysql.NullTime
}

func UserByEmail(email string) *User {
    db := db.DB()
    u := new(User)
    rows, err := db.Query("CALL User_ByEmail(?)", email) << A SELECT *... works but this doesn't

    if err != nil {
        panic(err)
    }
    fmt.Println(rows.Columns())

    for rows.Next() {
        if err := rows.Scan(
            &u.Id,
            &u.Email,
            &u.HashedPassword,
            &u.RoleId,
            &u.FirstName,
            &u.LastName,
            &u.Gender,
            &u.DateOfBirth,
            &u.Height,
            &u.CurrentWeight,
            &u.CreatedAt,
            &u.ConfirmedAt,
            &u.LastActivityAt,
            &u.DeletedAt); err != nil {
            panic(err)
        }
    }

    if err := rows.Err(); err != nil {
        panic(err)
    }
    fmt.Println(u)
    return u
}

Answer 1

使用MySQL，您当前无法调用存储过程，也不能立即执行多个语句。

http://go-database-sql.org/surprises.html

Answer 2

尝试使用单个qoutes。

喜欢这个

CALL User_ByEmail('?');

当输入参数的类型为VARCHAR时，您应该始终在值周围使用单引号。

Go MySQL存储过程无法返回结果集

2 个答案: