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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
# rubocop:disable RemoveIndex
class AddIndexToParentId < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
DOWNTIME = false
disable_ddl_transaction!
def up
add_concurrent_index(:namespaces, [:parent_id, :id], unique: true)
end
def down
remove_index :namespaces, [:parent_id, :id] if index_exists? :namespaces, [:parent_id, :id]
end
end
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