增加接口类 规范驱动扩展

library/think/db/ConnectionInterface.php

@@ -0,0 +1,47 @@
+<?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);
+}