Conditional Columns in Select Statement for any type of Report

Okay so I had a requirement to conditionally show columns on a report when the data in the column was not null. I played around the "vertical" report mentioned in other posts but it didn't work well for my needs. Also I know that there is a javascript solution for this as demonstarted in Denes Kubicek's app (which was copied from Vikas :) ). Anyways listed below is my approach.... Hope this can help anyone else out as it's just pl/sql returning sql. Also you will need execute on dbms_sql for this to work.
declare
v_count number := 0;
v_row_count number := 0;
v_col_name varchar2(100);
q varchar2(4000) := 'select ';
v_table_name varchar2(100) := :SOME_TABLE_NAME;
v_id varchar2(100) := 'num = '||:SOME_APEX_VALUE;
my_c INTEGER;
fdbk INTEGER;
statement varchar2(2000);
cval_out varchar2(2000);
nval_out number;
begin
select count(*) into v_count from cols
where table_name = v_table_name;
for counter in 1..v_count
loop
select column_name into v_col_name
from cols where table_name = v_table_name
and counter = column_id;
statement := 'select count(*) '||
' from '||v_table_name||
' where '||v_col_name||' is not null and '||v_id;
my_c := dbms_sql.open_cursor;
dbms_sql.parse(my_c,statement,dbms_sql.native);
dbms_sql.define_column(my_c,1,nval_out);
fdbk := dbms_sql.execute(my_c);
LOOP
exit when dbms_sql.fetch_rows(my_c) = 0;
dbms_sql.column_value(my_c,1,nval_out);
end loop;
v_row_count := nval_out;
dbms_sql.close_cursor(my_c);
if v_row_count > 0 then
q:=q||v_col_name||',';
end if;
end loop;
if(substr(q,length(q),1) = ',') then
q:= substr(q,0,length(q)-1);
end if;
q:= q||' from '||v_table_name||' where '||v_id;
end;Hope this helps...
-David
Message was edited by:
rdpatric

Hi Gints,
Thank you for your reply. This is my query and
nvl(TICKET_JOIN.TDQRLV,0) ACC_SHIPPED_QTY,
TICKET_JOIN.TDSOQS QUANTITY_TICKETED are the columns tha's creating issue. If I comment those columns Index is accessed properly.
select
'TKT' SOURCE,
TICKET_JOIN.TKDO01 HIRE_ID,
TICKET_JOIN.TKQ101 TRUCK_ID,
TICKET_JOIN.TKVEHT TRUCK_TYPE,
1 TRUCK_COMM,
nvl(TKCMP1,0) TICKET_NUM,
nvl(TKADTM,0) TICKET_TIME,
--TICKET_JOIN.TDSOQS QUANTITY_TICKETED,
0 CHECKIN_TIME,
--nvl(TICKET_JOIN.TDQRLV,0) ACC_SHIPPED_QTY,
nvl(DDADTM,0) START_TIME
from
(select
TICKET.TKCMP1,
TICKET.TKDO01,
TICKET.TKQ101,
TICKET.TKADTM ,
TICKET.TKVEHT,
TICKET_DETAILS.TDAITM ,
TICKET_DETAILS.TDQRLV ,
TICKET_DETAILS.TDSOQS ,
TICKET.TKCNTF,
TICKET.TKTRDJ,
TICKET.TK58GA8
from
CRPDTA.F5800091 TICKET_DETAILS ,
CRPDTA.F5800090 TICKET
where TICKET.TKCMP1 = TICKET_DETAILS.TDCMP1
and TICKET.TKTRDJ = TICKET_DETAILS.TDTRDJ
and TICKET.TKTRDJ = 107085
and TICKET.TKEV12 <> 'Y'
and TICKET.TK58GA8='ECSEO'
and TICKET.TKCNTF = '11') TICKET_JOIN ,
(select
DDDOCO,
DDCNTF,
DDQTFN,
DDAITM,
DDADTM,
DD58GA8,
DDTRDJ
from
CRPDTA.F5800051 ORDER_DETAILS,
CRPDTA.F5800050 ORDER_HEADER
where
ORDER_HEADER.DHDOCO = ORDER_DETAILS.DDDOCO
and ORDER_HEADER.DHTRDJ = ORDER_DETAILS.DDTRDJ
and ORDER_HEADER.DH58GA8 = ORDER_DETAILS.DD58GA8
and ORDER_HEADER.DHDCTO = ORDER_DETAILS.DDDCTO
/*and
(ORDER_HEADER.DHTRDJ = 107085
OR (ORDER_HEADER.DHTRDJ = 107084 and ORDER_HEADER.DHEV04='Y')
and TRIM(ORDER_HEADER.DH58GA8) = 'ECSEO'
and TRIM(ORDER_DETAILS.DDCNTF) = '11' ) ORDER_VIEW
where TICKET_JOIN.TKTRDJ = ORDER_VIEW.DDTRDJ
and TICKET_JOIN.TDAITM = ORDER_VIEW.DDAITM
and TICKET_JOIN.TKCNTF = ORDER_VIEW.DDCNTF
and TICKET_JOIN.TK58GA8 = ORDER_VIEW.DD58GA8
and NOT EXISTS ( select 1 from CRPDTA.F5800120 TRUCK_ASSIGNMENT
where TATRDJ = 107085
and TACNTF = '11'
and TA58GA8 = 'ECSEO'
and TICKET_JOIN.TKQ101||TICKET_JOIN.TKVEHT = TAQ101||TAVEHT )
Thanks
GM

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Edited by: Shipra Jhunjhunwala on Jul 22, 2009 1:33 PM
Edited by: Shipra Jhunjhunwala on Jul 22, 2009 1:34 PM
Edited by: Shipra Jhunjhunwala on Jul 22, 2009 1:35 PM

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