Index: flag.install
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/flag/Attic/flag.install,v
retrieving revision 1.2.2.32.2.4
diff -u -r1.2.2.32.2.4 flag.install
--- flag.install	26 Oct 2009 21:31:13 -0000	1.2.2.32.2.4
+++ flag.install	26 Oct 2009 21:40:46 -0000
@@ -212,7 +212,7 @@
     ),
     'primary key' => array('fcid'),
     'unique keys' => array(
-      'fid_content_type_content_id_uid' => array('fid', 'content_type', 'content_id', 'uid'),
+      'fid_content_id_uid' => array('fid', 'content_id', 'uid'),
     ),
     'indexes' => array(
       'content_type_content_id' => array('content_type', 'content_id'),
@@ -274,6 +274,7 @@
     'indexes' => array(
       'fid_content_type' => array('fid', 'content_type'),
       'content_type_content_id' => array('content_type', 'content_id'),
+      'count' => array('count'),
     ),
   );
 
@@ -482,6 +483,25 @@
   return $ret;
 }
 
+/**
+ * Refine the indexes.
+ *
+ * The content type inclusion actually slowed down on unique key. And a count
+ * index would be helpful for sorting by counts.
+ */
+function flag_update_6201() {
+  $ret = array();
+
+  // Remove "content type" from one key, see http://drupal.org/node/612602.
+  db_drop_unique_key($ret, 'flag_content', 'fid_content_type_content_id_uid');
+  db_add_unique_key($ret, 'flag_content', 'fid_content_id_uid', array('fid', 'content_id', 'uid'));
+
+  // Add a count index, see http://drupal.org/node/489610.
+  db_add_index($ret, 'flag_counts', 'count', array('count'));
+
+  return $ret;
+}
+
 // This is a replacement for update_sql(). The latter doesn't support placeholders.
 function _flag_update_sql($sql) {
   $args = func_get_args();