Issue #2596899 by bburg: Remove unnecessary DISTINCT from node access rebuild...

Issue #2596899 by bburg: Remove unnecessary DISTINCT from node access rebuild query to work around a MySQL bug

modules/node/node.module

@@ -3685,7 +3685,7 @@ function _node_access_rebuild_batch_operation(&$context) {
     // Initiate multistep processing.
     $context['sandbox']['progress'] = 0;
     $context['sandbox']['current_node'] = 0;
-    $context['sandbox']['max'] = db_query('SELECT COUNT(DISTINCT nid) FROM {node}')->fetchField();
+    $context['sandbox']['max'] = db_query('SELECT COUNT(nid) FROM {node}')->fetchField();
   }
 
   // Process the next 20 nodes.