AWS Redshift - Add IDENTITY column to existing table

In AWS Redshift, when attempting to add an IDENTITY column to an existing table using the command

ALTER TABLE table_name ADD COLUMN id bigint IDENTITY(1,1);

I get the following error

ERROR: ALTER TABLE ADD COLUMN does not support columns with type IDENTITY

Which obviously implies that this simply isn't allowed in Redshift. Will I need to drop and recreate the table? Or is there some workaround solution to get this done in Redshift?