Simplify getSQLForSelect more

lib/Doctrine/DBAL/Query/QueryBuilder.php

@@ -1095,9 +1095,15 @@ class QueryBuilder
             . ($this->sqlParts['having'] !== null ? ' HAVING ' . ((string) $this->sqlParts['having']) : '')
             . ($this->sqlParts['orderBy'] ? ' ORDER BY ' . implode(', ', $this->sqlParts['orderBy']) : '');
 
-        return ($this->maxResults === null && $this->firstResult == null)
-            ? $query
-            : $this->connection->getDatabasePlatform()->modifyLimitQuery($query, $this->maxResults, $this->firstResult);
+        if ($this->isLimitQuery()) {
+            return $this->connection->getDatabasePlatform()->modifyLimitQuery(
+                $query,
+                $this->maxResults,
+                $this->firstResult
+            );
+        }
+
+        return $query;
     }
 
     private function getFromClauses()
@@ -1129,6 +1135,11 @@ class QueryBuilder
         }
     }
 
+    private function isLimitQuery()
+    {
+        return $this->maxResults !== null || $this->firstResult != null;
+    }
+
     /**
      * Converts this instance into an INSERT string in SQL.
      *