Challenging Lexical Reference and SQL Problem

Question

Hi,
I am trying to build a product hierarchy master report but I have a challenging problem at hand. To generate the report I need an SQL statement with lexical references and before parameter form. Basically, my SQL statement looks something like this:
Select &Columns
From &Tables
Where &Criteria
Before Parameter:
In If X='1',
&Columns := A.NAME, B.NAME, C.NAME
&Tables:=A,B,C
&Criteria:= A.CODE=B.CODE, B.CODE=C.CODE
In If X='2',
&Columns := A.NAME, B.NAME, C.NAME, D.NAME
&Tables:=A,B,C,D
&Criteria:= A.CODE=B.CODE, B.CODE=C.CODE,C.CODE=D.CODE
In If X='3',
&Columns := A.NAME, B.NAME, C.NAME, D.NAME, E.NAME
&Tables:=A,B,C,D,E
&Criteria:= A.CODE=B.CODE, B.CODE=C.CODE,C.CODE=D.CODE, C.CODE=E.CODE
I need to build a group left report and group by A,B and up to E if X='3'.
Any idea how can I accomplish this? Any kind of help or advice is urgently needed. Thank you in advance.

Answer 1

Siak,
build a kind of maximum modell. Set the initial values of your Parameters to the maximum (like for columns:
a.name as aname, b.name as bname, ...., e.name as ename)
and build a layout for this. Then in a before report trigger set the paramters you want and fill the not needed with dummy values. For example if X=1 then
:columns := 'a.name as aname, b.name as bname, c.name as cname, ''x'' as dname, ''x'' as ename'
In the layout supress the output of non used fields with a format trigger or use dependent from your X three different layouts. I've not tested it, but it's a chance ...
regards
Rainer