<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\db;

interface ConnectionInterface
{
    /**
     * 解析pdo连接的dsn信息
     * @access public
     * @param array $config 连接信息
     * @return string
     */
    public function parseDsn($config);

    /**
     * 取得数据表的字段信息
     * @access public
     * @param string $tableName
     * @return array
     */
    public function getFields($tableName);

    /**
     * 取得数据库的表信息
     * @access public
     * @param string $dbName
     * @return array
     */
    public function getTables($dbName);

    /**
     * SQL性能分析
     * @access protected
     * @param string $sql
     * @return array
     */
    public function getExplain($sql);
}