Add index of account and reblog to statuses (#5785)

db/migrate/20171122120436_add_index_account_and_reblog_of_id_to_statuses.rb

+class AddIndexAccountAndReblogOfIdToStatuses < ActiveRecord::Migration[5.1]
+  def change
+    commit_db_transaction
+    add_index :statuses, [:account_id, :reblog_of_id], algorithm: :concurrently
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20171119172437) do
+ActiveRecord::Schema.define(version: 20171122120436) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -397,6 +397,7 @@ ActiveRecord::Schema.define(version: 20171119172437) do
     t.bigint "application_id"
     t.bigint "in_reply_to_account_id"
     t.index ["account_id", "id"], name: "index_statuses_on_account_id_id"
+    t.index ["account_id", "reblog_of_id"], name: "index_statuses_on_account_id_and_reblog_of_id"
     t.index ["conversation_id"], name: "index_statuses_on_conversation_id"
     t.index ["in_reply_to_id"], name: "index_statuses_on_in_reply_to_id"
     t.index ["reblog_of_id"], name: "index_statuses_on_reblog_of_id"