From 21b0cc73c426c1bbec36027df37e8fe18a6892ac Mon Sep 17 00:00:00 2001
From: Qiang Xue <qiang.xue@gmail.com>
Date: Sat, 24 Aug 2013 06:24:36 -0400
Subject: [PATCH] fixed uninitialized pro issue.

---
 framework/yii/db/Connection.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/framework/yii/db/Connection.php b/framework/yii/db/Connection.php
index f27698a..a843823 100644
--- a/framework/yii/db/Connection.php
+++ b/framework/yii/db/Connection.php
@@ -523,6 +523,7 @@ class Connection extends Component
 		if (($pos = strpos($this->dsn, ':')) !== false) {
 			return strtolower(substr($this->dsn, 0, $pos));
 		} else {
+			$this->open();
 			return strtolower($this->pdo->getAttribute(PDO::ATTR_DRIVER_NAME));
 		}
 	}