class ActiveRecord::SchemaDumper

def index_parts(index)
  index_parts = [
    index.columns.inspect,
    "name: #{index.name.inspect}",
  ]
  index_parts << "unique: true" if index.unique
  index_parts << "length: #{format_index_parts(index.lengths)}" if index.lengths.present?
  index_parts << "order: #{format_index_parts(index.orders)}" if index.orders.present?
  index_parts << "opclass: #{format_index_parts(index.opclasses)}" if index.opclasses.present?
  index_parts << "where: #{index.where.inspect}" if index.where
  index_parts << "using: #{index.using.inspect}" if !@connection.default_index_type?(index)
  index_parts << "type: #{index.type.inspect}" if index.type
  index_parts << "comment: #{index.comment.inspect}" if index.comment
  index_parts
end