# See http://doc.gitlab.com/ce/development/migration_style_guide.html# for more information on how to write migrations for GitLab.class<%= migration_class_name %> < ActiveRecord::Migration include Gitlab::Database::MigrationHelpers DOWNTIME =false
# When using the methods "add_concurrent_index", "remove_concurrent_index" or# "add_column_with_default" you must disable the use of transactions# as these methods can not run in an existing transaction.# When using "add_concurrent_index" or "remove_concurrent_index" methods make sure# that either of them is the _only_ method called in the migration,# any other changes should go in a separate migration.# This ensures that upon failure _only_ the index creation or removing fails# and can be retried or reverted easily.