From 03144e1c0f2ba41a7570850b69d5029bc2619fd2 Mon Sep 17 00:00:00 2001
From: Michael Kozono <mkozono@gmail.com>
Date: Wed, 3 May 2017 12:00:52 -0700
Subject: [PATCH] Index redirect_routes path for LIKE

---
 ...032_index_redirect_routes_path_for_like.rb | 29 +++++++++++++++++++
 db/schema.rb                                  |  1 +
 lib/tasks/migrate/setup_postgresql.rake       |  1 +
 3 files changed, 31 insertions(+)
 create mode 100644 db/migrate/20170503185032_index_redirect_routes_path_for_like.rb

diff --git a/db/migrate/20170503185032_index_redirect_routes_path_for_like.rb b/db/migrate/20170503185032_index_redirect_routes_path_for_like.rb
new file mode 100644
index 00000000000..5b8b6c828be
--- /dev/null
+++ b/db/migrate/20170503185032_index_redirect_routes_path_for_like.rb
@@ -0,0 +1,29 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class IndexRedirectRoutesPathForLike < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  INDEX_NAME = 'index_redirect_routes_on_path_text_pattern_ops'
+
+  disable_ddl_transaction!
+
+  def up
+    return unless Gitlab::Database.postgresql?
+
+    unless index_exists?(:redirect_routes, :path, name: INDEX_NAME)
+      execute("CREATE INDEX CONCURRENTLY #{INDEX_NAME} ON redirect_routes (path varchar_pattern_ops);")
+    end
+  end
+
+  def down
+    return unless Gitlab::Database.postgresql?
+
+    if index_exists?(:redirect_routes, :path, name: INDEX_NAME)
+      execute("DROP INDEX CONCURRENTLY #{INDEX_NAME};")
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 45c3b9a4c91..8d3f4b4bd36 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1049,6 +1049,7 @@ ActiveRecord::Schema.define(version: 20170504102911) do
   end
 
   add_index "redirect_routes", ["path"], name: "index_redirect_routes_on_path", unique: true, using: :btree
+  add_index "redirect_routes", ["path"], name: "index_redirect_routes_on_path_text_pattern_ops", using: :btree, opclasses: {"path"=>"varchar_pattern_ops"}
   add_index "redirect_routes", ["source_type", "source_id"], name: "index_redirect_routes_on_source_type_and_source_id", using: :btree
 
   create_table "releases", force: :cascade do |t|
diff --git a/lib/tasks/migrate/setup_postgresql.rake b/lib/tasks/migrate/setup_postgresql.rake
index 8938bc515f5..1e00b47303d 100644
--- a/lib/tasks/migrate/setup_postgresql.rake
+++ b/lib/tasks/migrate/setup_postgresql.rake
@@ -11,4 +11,5 @@ task setup_postgresql: :environment do
   AddUsersLowerUsernameEmailIndexes.new.up
   AddLowerPathIndexToRoutes.new.up
   IndexRoutesPathForLike.new.up
+  IndexRedirectRoutesPathForLike.new.up
 end