PLSQL function body returning an sql report returns ORA-01403 No Data Found

Question

I am on APEX 3.1.2.00.02 and Oracle 10g.
I am developing a report with SQL Query (PL/SQL function body returning SQL query) type. But on running the report I am getting
report error:
ORA-01403: no data found
Region Source
declare
  qry varchar2(32767);
begin
  --Procedure call
  my_pkg.get_query(qry);
  htp.p(qry);
  return /*select 1 from dual */ qry;
end;
Procedure
PROCEDURE get_query (V_QRY OUT VARCHAR2)
IS
  qry varchar2(32767);
begin
  qry := ' select name
     , max(decode(to_char(service_date,''Mon-YY''), ''Jan-09'', value, null)) as "Jan-09"
     , max(decode(to_char(service_date,''Mon-YY''), ''Jan-09'', value, null)) as "Feb-09"
     from MY_TABLE
     group by name ';
  V_QRY := qry;
end;
The query will be enhanced later to add more months and year based on user parameters once I am successfull in running report on this.
I wish to use Query Specific Column names. I have seen this suggestion from Scott in a number of threads to use /*select 1 from dual */ with query but not working in my case.
Can someone please suggest what can I do to make it working?
Regards,
Amir

Answer 1

Firstly, have you unit tested the procedure (namely, within the SQL Workshop, SQL*Plus, SQL Developer,etc, etc.) to see if it produces the right output in the first place?
If you have, and the query string generated is valid, try assigning the output to a page item (thus allowing you to view it in the session browser) or even pass the procedure output into the debug window (with the use of the wwv_flow.debug function). This might reveal some state or session change which is causing it not to return.You might find this easier to achieve if you change from a 'procedure and out parameter' combination to a 'function returning string' approach.
Alternatively, try re-creating the report in a new region - occasionally I've come across weird bugs with report regions which resolved themselves in this manner.