mastodon/db/migrate/20171129172043_add_index_on_stream_entries.rb

class AddIndexOnStreamEntries < ActiveRecord::Migration[5.1]
  disable_ddl_transaction!

  def change
    add_index :stream_entries, [:account_id, :activity_type, :id], algorithm: :concurrently
    remove_index :stream_entries, name: :index_stream_entries_on_account_id
  end
end
add index on stream_entries table (#5793) 2017-11-30 11:35:54 +09:00			`class AddIndexOnStreamEntries < ActiveRecord::Migration[5.1]`
Use disable_ddl_transaction! to prevent warnings on migration (#6183) Migration is wrapped by transaction, so manual `commit_db_transaction` without transaction restarting causes "there is no transaction in progress" warnings. We should use `disable_ddl_transaction!` instead, if we can omit transaction completely. 2018-01-05 03:38:29 +09:00			`disable_ddl_transaction!`

add index on stream_entries table (#5793) 2017-11-30 11:35:54 +09:00			`def change`
			`add_index :stream_entries, [:account_id, :activity_type, :id], algorithm: :concurrently`
			`remove_index :stream_entries, name: :index_stream_entries_on_account_id`
			`end`
			`end`