You can find the creation order of columns in a table called T1 with the following query:

SELECT column_name
FROM SYSTAB JOIN SYSTABCOL
   WHERE table_name = 't1'
ORDER BY column_id

For a detailed explanation of how to define stored procedures for deletes, see Tutorial: Using scripted upload.

The following example creates a table called t1 and a publication called p1. The publication specifies WITH SCRIPTED UPLOAD and registers the stored procedure t1_delete as the delete procedure. In the definition of the t1_delete stored procedure, the result set includes all columns listed in the CREATE PUBLICATION statement but in the order in which the columns were declared in the CREATE TABLE statement.

CREATE TABLE t1(
   //The column ordering is taken from here
   pk integer primary key,
   c1 char( 30),
   c2,   float,
   c3 double );

CREATE PROCEDURE t1_delete ()
RESULT( pk integer, c1 char(30), c3 double )
begin
   ...
end

CREATE PUBLICATION p1 WITH SCRIPTED UPLOAD(
   // Order of columns here is ignored       
   TABLE t1( c3, pk, c1 ) USING ( 
     PROCEDURE t1_delete FOR UPLOAD DELETE 
   )
)