Add indexes on various timestamps to speed up the activity view.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2981 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20091025163651_add_activity_indexes.rb

@@ -0,0 +1,25 @@
+class AddActivityIndexes < ActiveRecord::Migration
+  def self.up
+    add_index :journals, :created_on
+    add_index :changesets, :committed_on
+    add_index :wiki_content_versions, :updated_on
+    add_index :messages, :created_on
+    add_index :issues, :created_on
+    add_index :news, :created_on
+    add_index :attachments, :created_on
+    add_index :documents, :created_on
+    add_index :time_entries, :created_on
+  end
+
+  def self.down
+    remove_index :journals, :created_on
+    remove_index :changesets, :committed_on
+    remove_index :wiki_content_versions, :updated_on
+    remove_index :messages, :created_on
+    remove_index :issues, :created_on
+    remove_index :news, :created_on
+    remove_index :attachments, :created_on
+    remove_index :documents, :created_on
+    remove_index :time_entries, :created_on
+  end
+end