From d1b60ab45b661ed58ad3b87c898033c21d3b1a47 Mon Sep 17 00:00:00 2001
From: leunggamciu <gamciuleung@gmail.com>
Date: Fri, 11 Mar 2016 17:49:12 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8Dundefined=20index:extra?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 library/think/db/driver/Mysql.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/library/think/db/driver/Mysql.php b/library/think/db/driver/Mysql.php
index c08c6f59..1c48278c 100644
--- a/library/think/db/driver/Mysql.php
+++ b/library/think/db/driver/Mysql.php
@@ -130,8 +130,10 @@ class Mysql extends Driver
         $pdo    = $this->linkID->query("EXPLAIN " . $sql);
         $result = $pdo->fetch(\PDO::FETCH_ASSOC);
         $result = array_change_key_case($result);
-        if (strpos($result['extra'], 'filesort') || strpos($result['extra'], 'temporary')) {
-            Log::record('SQL:' . $this->queryStr . '[' . $result['extra'] . ']', 'warn');
+        if (isset($result['extra'])) {
+            if (strpos($result['extra'], 'filesort') || strpos($result['extra'], 'temporary')) {
+                Log::record('SQL:' . $this->queryStr . '[' . $result['extra'] . ']', 'warn');
+            }
         }
         return $result;
     }