From ac0a9721efaa38203407b619400f01840ef7ad5c Mon Sep 17 00:00:00 2001
From: thinkphp <thinkphp@qq.com>
Date: Mon, 7 May 2018 22:29:32 +0800
Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9B=E6=9F=A5=E8=AF=A2?=
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---
 library/think/db/Builder.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/think/db/Builder.php b/library/think/db/Builder.php
index 825d54b2..a841dba2 100644
--- a/library/think/db/Builder.php
+++ b/library/think/db/Builder.php
@@ -268,7 +268,7 @@ abstract class Builder
             $str = [];
             foreach ($val as $field => $value) {
                 if ($value instanceof Expression) {
-                    $str[] = ' ' . $key . ' ( ' . $value->getValue() . ' )';
+                    $str[] = ' ' . $key . ' ( ' . $field . ' ' . $value->getValue() . ' )';
                     continue;
                 }
                 if ($value instanceof \Closure) {