Index: modules/node/node.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.install,v
retrieving revision 1.51
diff -u -r1.51 node.install
--- modules/node/node.install	14 May 2010 04:37:53 -0000	1.51
+++ modules/node/node.install	31 May 2010 05:03:23 -0000
@@ -113,6 +113,7 @@
       'uid'                 => array('uid'),
       'tnid'                => array('tnid'),
       'translate'           => array('translate'),
+      'language'            => array('language'),
     ),
     'unique keys' => array(
       'vid' => array('vid'),
@@ -674,6 +675,13 @@
 }
 
 /**
+ * Add an index on {node}.language.
+ */
+function node_update_7011() {
+  db_add_index('node', 'language', array('language'));
+}
+
+/**
  * @} End of "defgroup updates-6.x-to-7.x"
  * The next series of updates should start at 8000.
  */