diff --git a/lib/tablelib.php b/lib/tablelib.php
index 8409b5972c8..33e268824c9 100644
--- a/lib/tablelib.php
+++ b/lib/tablelib.php
@@ -2048,6 +2048,8 @@ class table_sql extends flexible_table {
     }
 
     /**
+     * Build the table from the fetched data.
+     *
      * Take the data returned from the db_query and go through all the rows
      * processing each col using either col_{columnname} method or other_cols
      * method or if other_cols returns NULL then put the data straight into the
@@ -2056,18 +2058,13 @@ class table_sql extends flexible_table {
      * After calling this function, don't forget to call close_recordset.
      */
     public function build_table() {
-
-        if ($this->rawdata instanceof \Traversable && !$this->rawdata->valid()) {
-            return;
-        }
         if (!$this->rawdata) {
             return;
         }
 
         foreach ($this->rawdata as $row) {
             $formattedrow = $this->format_row($row);
-            $this->add_data_keyed($formattedrow,
-                $this->get_row_class($row));
+            $this->add_data_keyed($formattedrow, $this->get_row_class($row));
         }
     }