From d56e91f44fdebdf39c672f81d649e8037b42672b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9gis=20Hanol?= <regis@hanol.fr>
Date: Wed, 4 Nov 2015 00:42:19 +0100
Subject: [PATCH] PERF: add 'lower(title)' index on topics

---
 .../20151103233815_add_lower_title_index_on_topics.rb    | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 db/migrate/20151103233815_add_lower_title_index_on_topics.rb

diff --git a/db/migrate/20151103233815_add_lower_title_index_on_topics.rb b/db/migrate/20151103233815_add_lower_title_index_on_topics.rb
new file mode 100644
index 00000000000..bdd93fd5339
--- /dev/null
+++ b/db/migrate/20151103233815_add_lower_title_index_on_topics.rb
@@ -0,0 +1,9 @@
+class AddLowerTitleIndexOnTopics < ActiveRecord::Migration
+  def up
+    execute "CREATE INDEX index_topics_on_lower_title ON topics (LOWER(title))"
+  end
+
+  def down
+    execute "DROP INDEX index_topics_on_lower_title"
+  end
+end