改进parseKey

Author: liu21st

src/db/builder/Mysql.php

@@ -109,6 +109,10 @@ protected function parseRegexp(Query $query, $key, $exp, $value, $field)
      */
     public function parseKey(Query $query, $key)
     {
+        if (is_int($key)) {
+            return $key;
+        }
+
         $key = trim($key);
 
         if (strpos($key, '->') && false === strpos($key, '(')) {