change_column

# File activerecord/lib/active_record/migration/compatibility.rb, line 19
        def change_column(table_name, column_name, type, options = {})
          if connection.adapter_name == "PostgreSQL"
            super(table_name, column_name, type, options.except(:default, :null, :comment))
            connection.change_column_default(table_name, column_name, options[:default]) if options.key?(:default)
            connection.change_column_null(table_name, column_name, options[:null], options[:default]) if options.key?(:null)
            connection.change_column_comment(table_name, column_name, options[:comment]) if options.key?(:comment)
          else
            super
          end
        end