Loading json string data as super from Glue job in to Redshift

We're inserting a json string, in the Glue catalogue as string, from a Glue job in to Redshift using write_dynamic_frame_from_jdbc_conf.

We'd like to use the super data type to query the nested json data and I was wondering how it would be possible from the glue job to set the column as super or alter the varchar column once its in Redshift?