diff --git a/library/think/db/driver/Mysql.php b/library/think/db/driver/Mysql.php
index 471e44f2..861335f3 100644
--- a/library/think/db/driver/Mysql.php
+++ b/library/think/db/driver/Mysql.php
@@ -57,6 +57,7 @@ class Mysql extends Driver
         $result = $this->query($sql);
         $info   = [];
         if ($result) {
+            $result = array_change_key_case($result);
             foreach ($result as $key => $val) {
                 $info[$val['field']] = [
                     'name'    => $val['field'],