From 427bf4b2df3e355911d6749bea05d624fc89ad71 Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Thu, 12 Apr 2018 16:52:16 +0800
Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9B?=
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---
 library/think/db/Query.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/library/think/db/Query.php b/library/think/db/Query.php
index 5b1c9003..327d2b4c 100644
--- a/library/think/db/Query.php
+++ b/library/think/db/Query.php
@@ -775,6 +775,9 @@ class Query
         }
 
         if (is_string($field)) {
+            if (preg_match('/[\<\'\"\(]/', $field)) {
+                return $this->fieldRaw($field);
+            }
             $field = array_map('trim', explode(',', $field));
         }
         if (true === $field) {