Select list from query in report

Question

Hello everybody,
I want to include a select list from a query in a report's colomn, but the select list should only be displayed conditionally. I wanted to do this with the help of "case when" in the corresponding SQL statement.
The select list itsself works, but when I combine it with "case when" I always get the error message:
ORA-01427: single-row subquery returns more than one row
The select statement is as following:
select
htmldb_item.checkbox(1,rownum) " ",
x.idee,
x.stunden_ilp,
x.stunden_ild,
x.stunden_ilm,
x.stunden_ief,
x.stunden_ir,
x.pe_id,
x.l_art_id,
x.version_id
from (
select
(select case
when (select name from cn_pl_projektidee s01
where s01.idee_id = '2') IS NULL then
(select distinct htmldb_item.select_list_from_query(5,name,'select distinct name from cn_pl_projektidee') name from cn_pl_projektidee s01
where s01.idee_id = t1.idee_id)
else
(select distinct htmldb_item.text(5,name) name from cn_pl_projektidee s01
where  s01.idee_id = t1.idee_id)
END from cn_pl_std_peplanung t1) Idee,
from cn_pl_std_peplanung t1, cn_pl_projektelemente z1, cn_pl_version u1, cn_pl_projektidee s1
where t1.version_id = '&P6_VERSION_WAHL.'
and t1.pe_id ='&P6_HELP_PRODET.' 
and t1.l_art_id ='&P6_L_ART_ID.'
group by t1.pe_id, t1.version_id, t1.idee_id, t1.l_art_id) x
order by x.ideeDoes anybody know what could be the problem or what other solutions I could try??
Greetings!
Patrick

Answer 1

Found 2 ways to solve it:
*1. dynamic action (JQuery)*
$("#f20_1234 option[value=13]").attr('selected', 'selected');
*2. process*
BEGIN
HTP.p('<script type="text/javascript">');
--HTP.p('problem()');
HTP.p('html_SetSelectValue(''f20_903'',188)');
HTP.p('html_SetSelectValue(''f20_903'',189)');
HTP.p('</script>');
END;