more fk indexes

also fix an old migration that should have ran on all shards

Change-Id: Ib4305c4f1b84ba0cfd525d0f552cfc21d365dc24
Reviewed-on: https://gerrit.instructure.com/37492
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jeremy Stanley <jeremy@instructure.com>
Reviewed-by: Brian Palmer <brianp@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>

db/migrate/20120727145852_add_unique_index_on_notifications.rb

@@ -2,14 +2,12 @@ class AddUniqueIndexOnNotifications < ActiveRecord::Migration
   tag :postdeploy
 
   def self.up
-    return unless Shard.current.default?
     # the excess subquery is necessary to avoid error 1093 on mysql
     Notification.where("id NOT IN (SELECT * FROM (SELECT MIN(id) FROM notifications GROUP BY name) x)").delete_all
     add_index :notifications, [:name], :unique => true, :name => "index_notifications_unique_on_name"
   end
 
   def self.down
-    return unless Shard.current.default?
     remove_index :notifications, :name => "index_notifications_unique_on_name"
   end
 end

db/migrate/20140710153035_add_foreign_key_indexes3.rb

@@ -0,0 +1,14 @@
+class AddForeignKeyIndexes3 < ActiveRecord::Migration
+  tag :postdeploy
+  disable_ddl_transaction!
+
+  def self.up
+    add_index :account_reports, :attachment_id, algorithm: :concurrently
+    add_index :zip_file_imports, :attachment_id, algorithm: :concurrently
+  end
+
+  def self.down
+    remove_index :account_reports, :attachment_id
+    remove_index :zip_file_imports, :attachment_id
+  end
+end