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5.x版本一键协程方案，mysql数据操作错误

### 问题描述
错误信息：

```
PHP Fatal error:  Uncaught think\db\exception\PDOException: SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active.  Consider using PDOStatement::fetchAll().  Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute. in /www/wwwroot/php-gapi/vendor/topthink/think-orm/src/db/PDOConnection.php:797
Stack trace:
#0 /www/wwwroot/php-gapi/vendor/topthink/think-orm/src/db/PDOConnection.php(856): think\db\PDOConnection->getPDOStatement()
#1 /www/wwwroot/php-gapi/vendor/topthink/think-orm/src/db/PDOConnection.php(819): think\db\PDOConnection->queryPDOStatement()
#2 /www/wwwroot/php-gapi/vendor/topthink/think-orm/src/db/PDOConnection.php(1098): think\db\PDOConnection->pdoExecute()
#3 /www/wwwroot/php-gapi/vendor/topthink/think-orm/src/db/BaseQuery.php(1098): think\db\PDOConnection->update()
```
### Swoole版本，PHP版本，以及操作系统版本信息
swoole 5.0.3 php 8.1.0

### 相关代码
```php
<?php

declare (strict_types=1);

namespace app\command;

use Swoole\Runtime;
use Swoole\WebSocket\Frame;
use think\console\Command;
use think\console\Input;
use think\console\Output;
use function Co\run;

class Websocket extends Command
{
 const WS_CONFIG_PARAMS = [
        'reactor_num' => 10, //设置启动的 Reactor 线程数,建议设置为 CPU 核数的 1-4 倍
        'worker_num' => 10, //设置启动的 Worker 进程数
        'max_request' => 10000, //设置 worker 进程的最大任务数
        'max_connection' => 1000000, //服务器程序，最大允许的连接数。最大允许维持多少个 TCP 连接
        'task_worker_num' => 5,//开启的task进程数
        'log_file' => './runtime/socket/websocket.log',
        'log_date_format' => '%Y-%m-%d %H:%M:%S',
        'log_rotation' => 'SWOOLE_LOG_ROTATION_DAILY',
    ];
    protected function configure()
    {
        // 给命令起一个名字
        $this->setName('game')
            ->setDescription('Start game  websocket server');
    }
    protected function execute(Input $input, Output $output)
    {
        $ws = new \swoole\websocket\server("0.0.0.0", 8100);
        $ws->set(self::WS_CONFIG_PARAMS);
        echo date("Y-m-d H:i:s") . 'websocket start' . PHP_EOL;
        Runtime::enableCoroutine();
        run(function () use($ws){
            // 监听open连接打开事件
        $ws->on('Open', function (\swoole\websocket\server $ws, \swoole\http\request $request) {
            echo "connection open: {$request->fd}" . PHP_EOL;
            $ws->push($request->fd, "连接成功");
        });
        // 监听message消息事件
        $ws->on('Message', function (\swoole\websocket\server $ws, Frame $frame) {
                //same code
                app('app\controller\Index')->save($frame->data);
        });
        //其他监听消息事件以及task

});
        $ws->start();
    }
}
```
### 你期待的结果是什么？实际看到的错误信息又是什么？
`app\controller\Index 文件中DB::name('user')->where(['id'=>3])->select();`这种正常数据库CURD能够正常操作，根据报错提示信息，调整了thinkphp数据库连接配置 `\PDO::MYSQL_ATTR_USE_BUFFERED_QUERY => true`,仍然无法解决

发布于10月前 · 48 次浏览 · 来自提问