Index: includes/database/select.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/database/select.inc,v
retrieving revision 1.4
diff -u -p -r1.4 select.inc
--- includes/database/select.inc	15 Sep 2008 05:00:48 -0000	1.4
+++ includes/database/select.inc	7 Oct 2008 19:01:20 -0000
@@ -633,6 +633,9 @@ class SelectQuery extends Query implemen
     foreach ($this->expressions as $alias => $expression) {
       $fields[] = $expression['expression'] . ' AS ' . $expression['alias'];
     }
+    if (empty($fields)) {
+      $fields[] = '*';
+    }
     $query .= implode(', ', $fields);
 
     // FROM - We presume all queries have a FROM, as any query that doesn't won't need the query builder anyway.