I suppose, first, a CRTDUPOBJ and then an Alter Table, such as:
ALTER TABLE LISTCONS
ADD ABNSTK CHAR(1) CCSID 37 NOT NULL WITH DEFAULT ;
LABEL ON <<SNIP>>
This adds the field at the end; personally, I rarely use Alter Table
so I don't know if one could actually insert a field (column) at
another relative location.