docs: def _delete_sourcesystem_cd(conn: Connection, table: Table, sourcesystem_cd: str) -> int:
          """ Remove all table records with the supplied upload_id
  
          :param conn: sql connection
          :param table: table to modify
          :param sourcesystem_cd: target sourcesystem code
          :return: number of records removed
          """
          return conn.execute(delete(table).where(table.c.sourcesystem_cd == sourcesystem_cd)).rowcount \
              if sourcesystem_cd else 0