无法通过 Laravel 迁移 mysql/mariaDB 运行

Question

我正在尝试创建一个 mysql 存储函数

        DROP FUNCTION IF EXISTS getDistance;
        
        DELIMITER $$
            CREATE FUNCTION `getDistance`(`lat1` VARCHAR(255), `lng1` VARCHAR(255), `lat2` VARCHAR(255), `lng2` VARCHAR(255)) RETURNS varchar(255) CHARSET utf8
            BEGIN
                DECLARE distance varchar(255);
           
                SELECT (6371 * acos(cos(radians(lat2)) * cos(radians(lat1)) * cos(radians(lng1) - radians(lng2)) + sin(radians(lat2)) * sin(radians(lat1)))) INTO distance;
                 
                if(distance is null) then
                    return null;
                else 
                    return distance;
                end if;
            END
        $$
        DELIMITER ;

如果我通过 phpMyAdmin 执行该函数，工作正常并且函数是在数据库中创建的

但是当我尝试运行 Laravel(v6.x) 迁移以创建存储函数时我收到错误

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateStoredFunction extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
       DB::unprepared('
            DROP FUNCTION IF EXISTS getDistance;
            
            DELIMITER $$
                CREATE FUNCTION `getDistance`(`lat1` VARCHAR(255), `lng1` VARCHAR(255), `lat2` VARCHAR(255), `lng2` VARCHAR(255)) RETURNS varchar(255) CHARSET utf8
                BEGIN
                    DECLARE distance varchar(255);
               
                    SELECT (6371 * acos(cos(radians(lat2)) * cos(radians(lat1)) * cos(radians(lng1) - radians(lng2)) + sin(radians(lat2)) * sin(radians(lat1)))) INTO distance;
                     
                    if(distance is null) then
                        return null;
                    else 
                        return distance;
                    end if;
                END
            $$
            DELIMITER ;
        ');
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        DB::unprepared('DROP FUNCTION IF EXISTS getDistance');
    }
}

错误

Doctrine\DBAL\Driver\PDO\Exception::("SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'DELIMITER $$ CREATE FUNCTION getDistance(lat1 VARCHAR(255), ' at line 1")

Answer 1

DELIMITER 不是有效的 SQL 语句。这只是一个 MySql 客户端命令。所以不要使用它。你得到的错误告诉你。

您可以像这样在 Laravel 中创建一个存储过程，这将使 DELIMITER 过时

试试这个

class CreateStoredFunction extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
       DB::unprepared('
            DROP FUNCTION IF EXISTS getDistance;
            
            
                CREATE FUNCTION `getDistance`(`lat1` VARCHAR(255), `lng1` VARCHAR(255), `lat2` VARCHAR(255), `lng2` VARCHAR(255)) RETURNS varchar(255) CHARSET utf8
                BEGIN
                    DECLARE distance varchar(255);
               
                    SELECT (6371 * acos(cos(radians(lat2)) * cos(radians(lat1)) * cos(radians(lng1) - radians(lng2)) + sin(radians(lat2)) * sin(radians(lat1)))) INTO distance;
                     
                    if(distance is null) then
                        return null;
                    else 
                        return distance;
                    end if;
                END
           
        ');
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        DB::unprepared('DROP FUNCTION IF EXISTS getDistance');
    }
}

无法通过 Laravel 迁移 mysql/mariaDB 运行

Unable to mysql/mariaDB function through Laravel migrations

php

mysql

stored-functions

mariadb

laravel