php - 如何在 Laravel 中加入 "SET SQL_BIG_SELECTS=1"语句

Question

当我尝试使用 6 个连接执行数据库查询时，我收到以下错误消息:

SQLSTATE[42000]: Syntax error or access violation: 1104 The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okay

 $results = DB::table('table_1')
->join('table_2', 'table_1.id', '=', 'table_2.id')

...

我的问题是: 如何在 Laravel 查询中设置“SET SQL_BIG_SELECTS=1”？

Answer 1

我找到了一个解决方案:)

in app/config/database.php

更改以下内容:

'mysql' => [
        'driver'    => 'mysql',
        'host'      => env('DB_HOST', 'localhost'),
        'database'  => env('DB_DATABASE', 'forge'),
        'username'  => env('DB_USERNAME', 'forge'),
        'password'  => env('DB_PASSWORD', ''),
        'charset'   => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix'    => '',
        'strict'    => false,
    ],

收件人:

'mysql' => [
        'driver'    => 'mysql',
        'host'      => env('DB_HOST', 'localhost'),
        'database'  => env('DB_DATABASE', 'forge'),
        'username'  => env('DB_USERNAME', 'forge'),
        'password'  => env('DB_PASSWORD', ''),
        'charset'   => 'utf8',
        'collation' => 'utf8_unicode_ci',
        'prefix'    => '',
        'options'   => array(
            PDO::MYSQL_ATTR_INIT_COMMAND => 'SET SESSION SQL_BIG_SELECTS=1',
        ),
        'strict'    => false,
    ],

我添加了“选项”数组并定义了 SQL_BIG_SELECTS

就是这样，我们可以按照我们需要的任何方式配置 PDO!

希望这对其他人有用;)