Maximum length of query string for functions return a SELECT

Question

Hi all,
I have a report that gets it's SELECT statement from a function, instead of being coded into the region. All was well but I suspect now I'm blowing some kind of limit as I'm getting an error :
     ORA-06502: PL/SQL: numeric or value error
     Error      ERR-1101 Unable to process function body returning query.
However if I run the procedure out of ApEx and grab the SELECT statement then it works fine. The length of the query is 8636 bytes (yup, it's a beauty!).
Does anyone know if there is a hard limit to the size of the string that can be returned?
I'm using ApEx 3.1.
Thanks,
Steve H

Answer 1

I do have a similar painfull scenario - Although my query length is very less i.e 618 bytes only.
I have defined a stored function, which returns an SQL query string, this return SQL string executes fantastic but when I tried to to call this function from a APEX report it gives error. the details are as follows. Please help.......
The function code:
CREATE OR REPLACE function PROD."TEST_C_QRY"
return VARCHAR2
is
msql VARCHAR2(32767);
Begin
msql:='Select null,statusname,AgeInd, ';
For m_stat in (select statusname from a02_status)
loop
msql:= msql || q'[decode(statusname,']';
msql:= msql || m_stat.statusname;
msql:= msql || q'[',count(id),0) ]';
msql:= msql || m_stat.statusname|| ',';
end loop;
msql:=rtrim(msql,',');
msql:= msql||' from ';
msql:= msql||'( ';
msql:= msql||'select a.id, round(sysdate-a.registeredon) TimeSpan,';
msql:= msql||'case ';
msql:= msql||q'[when round(sysdate-a.registeredon)<=7 then 'Week' ]';
msql:= msql||q'[when round(sysdate-a.registeredon)>7 and round(sysdate-a.registeredon)<14 then 'Fortnight' ]';
msql:= msql||q'[when round(sysdate-a.registeredon)>14 and round(sysdate-a.registeredon)<30 then 'Month' ]';
msql:= msql||q'[else 'More...'  end ageind,]';
msql:= msql||'a.status_id,b.statusname ';
msql:= msql||'from a02_task a,a02_status b ';
msql:= msql||'where b.id=a.status_id) ';
msql:= msql||'group by statusname,AgeInd;';
return msql;
end TEST_C_QRY;
The Output SQL comes from this is
SQL> Select null,statusname,AgeInd, decode(statusname,'Scheduled',count(id),0) Scheduled,decode(statusname,'Executing',count(id),0) Executing,decode(statusname,
'Completed',count(id),0) Completed from ( select a.id, round(sysdate-a.registeredon) TimeSpan, case when round(sysdate-a.registeredon)<=7 then 'Week' when round
(sysdate-a.registeredon)>7 and round(sysdate-a.registeredon)<14 then 'Fortnight' when round(sysdate-a.registeredon)>14 and round(sysdate-a.registeredon)<30 then
'Month' else 'More...' end ageind, a.status_id,b.statusname from a02_task a,a02_status b where b.id=a.status_id) group by statusname,AgeInd;
The result that comes when I execute the above resultant SQL is as follows.
N STATUSNAME AGEIND SCHEDULED EXECUTING COMPLETED
Completed More... 0 0 4
Completed Week 0 0 1
Scheduled Week 1 0 0
Completed Month 0 0 3
Executing More... 0 1 0
Executing Month 0 6 0
Scheduled More... 1 0 0
7 rows selected.
But the surprising error that comes from Oracle XE when I use the following code for stacked bar chart
Code:
begin
return TEST_D_QRY;
end;
Error thrown by XE report builder is as follows:
1 error has occurred
Failed to parse SQL query!
Select null,statusname,AgeInd, decode(statusname,'Scheduled',count(id),0) Scheduled,decode(statusname,'Executing',count(id),0) Executing,decode(statusname,'Completed',count(id),0) Completed from ( select a.id, round(sysdate-a.registeredon) TimeSpan, case when round(sysdate-a.registeredon)<=7 then 'Week' when round(sysdate-a.registeredon)>7 and round(sysdate-a.registeredon)<14 then 'Fortnight' when round(sysdate-a.registeredon)>14 and round(sysdate-a.registeredon)<30 then 'Month' else 'More...' end ageind, a.status_id,b.statusname from a02_task a,a02_status b where b.id=a.status_id) group by statusname,AgeInd;
Certain queries can only be executed when running your application, if your query appears syntactically correct, you can save your query without validation (see options below query source).
Regards,
Soumen