Error message:FRM-12001: Cannot Create the record group(check your query)

Question

Requirement: Need to get employee name and number in the LOV in search criteria.
So I created LOV "full_name" and Record group Query under Employee Name property palette with
select papf.title||' '||papf.last_name||', '||papf.first_name||' '||papf.middle_names emp_full_name
,papf.employee_number
from apps.per_all_people_f papf, apps.per_person_types ppt
where sysdate between papf.effective_start_date and papf.effective_end_date AND papf.person_type_id=ppt.person_type_id AND ppt.system_person_type IN ('EMP', 'OTHER', 'CWK','EMP_APL')
AND PPT.default_flag='Y' and papf.BUSINESS_GROUP_ID=1
order by papf.full_name
I was unable to save and getting error message "FRM-12001: Cannot Create the record group(check your query)".
I cant use PER_ALL_PEOPLE_F.FULL_NAME since full name here is last_name||title||middle_names||firstname.
But my requiremnet is papf.title||' '||papf.last_name||', '||papf.first_name||' '||papf.middle_names emp_full_name .
Can any one of you help me.

Answer 1

First, Magoo wrote:
<pre><font face = "Lucida Console, Courier New, Courier, Fixed" size = "1" color = "navy">create or replace function emp_full_name ( p_title in varchar2,
p_last_name in varchar2,
p_first_name in varchar2,
p_mid_names in varchar2 ) return varchar2 is
begin
for l_rec in ( select decode ( p_title, null, null, p_title || ' ' ) ||
p_last_name || ', ' || p_first_name ||
decode ( p_mid_names, null, null, ' ' || p_mid_names ) full_name
from dual ) loop
return ( l_rec.full_name );
end loop;
end;</font></pre>
Magoo, you don't ever need to use Select from Dual. And the loop is completely unnecessary, since Dual always returns only one record. This would be much simpler:
<pre><font face = "Lucida Console, Courier New, Courier, Fixed" size = "1" color = "navy">create or replace function emp_full_name
( p_title in varchar2,
p_last_name in varchar2,
p_first_name in varchar2,
p_mid_names in varchar2 ) return varchar2 is
begin
Return ( Ltrim( Rtrim ( p_title
||' ' ||p_last_name
||', '||p_first_name
||' ' ||p_middle_names )));
end;</font></pre>
And second:
user606106, you did not mention how you got your record group working. However, you DO have an issue with spaces. If you change this:
<pre><font face = "Lucida Console, Courier New, Courier, Fixed" size = "1" color = "navy">select papf.title||' '||papf.last_name||', '||papf.first_name||' '||papf.middle_names emp_full_name
,papf.employee_number </font></pre>
to this:
<pre><font face = "Lucida Console, Courier New, Courier, Fixed" size = "1" color = "navy">select Ltrim(Rtrim(papf.title||' '||papf.last_name||', '
||papf.first_name||' '||papf.middle_names)) AS emp_full_name,
papf.employee_number</font></pre>
it should work. The Ltrim(Rtrim()) removes leading and trailing spaces from the resulting full name.