In Ref cursor, user defined functions give "invalid column" error in EJB.

Question

Hello,
I have written PL/SQL stored procedures/functions in Oracle 8i. They return the result set as a ref cursor.
These procedures are accessed by EJB (weblogic) using Type 4 (100% Java) JDBC Driver.
My problem is - if I use a user defined function to fetch a value in the select statement of the reference cursor, the EJB gives an error msg - invalid column name.
If instead of using the function I get the value directly from the table, it works fine. Refer the code below :
//In the PL/SQL function -
//instead of writing :
Open rc for
Select empcode, empname
from emp ;
//If I write :
Open rc for
Select empcode, mypack.getempname(empcode)
from emp ;
//getempname(empcode) is a function in
//in a package named 'mypack'
//and returns name for empcode.
//The java code gives error
//error : invalid column name
//While both are working fine and
//returning currect result in SQL Navigator.
Help me solve this mystery ?
Thanks in advance.
Swati.
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Answer 1

Hi:
When use inline Function to simplify the SQL statements, there is one thing that one should conside--Purity Level.
if you create standalone stored pl/sql function. Oracle implicitly determines the PURITY level during compilation of the stored objects or at execution of an anonymous pl/sql block.
if you implement Package inline Function( in your case),unlike standalone stored pl/sql functions, the PL?SQL Engine does not determine the purity level of package functions. Therefore, you must explicity assign the correct purity levels for the function to be called inline.
the code like:
create or replace package mypack is
function getempname(empcode emp%empid%type)
return varchar2;
PRAGMA RESTRICT_REFERENCES(getempname,WNDS,WNPS,RNPS);
end mypack;
I think it can solve your problem if you use enough "pure"to be called inline function. Or you can create the standalone function to do it.
good luck!
Yali
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by Swati Agrawal ([email protected]):
Hello,
I have written PL/SQL stored procedures/functions in Oracle 8i. They return the result set as a ref cursor.
These procedures are accessed by EJB (weblogic) using Type 4 (100% Java) JDBC Driver.
My problem is - if I use a user defined function to fetch a value in the select statement of the reference cursor, the EJB gives an error msg - invalid column name.
If instead of using the function I get the value directly from the table, it works fine. Refer the code below :
//In the PL/SQL function -
//instead of writing :
Open rc for
Select empcode, empname
from emp ;
//If I write :
Open rc for
Select empcode, mypack.getempname(empcode)
from emp ;
//getempname(empcode) is a function in
//in a package named 'mypack'
//and returns name for empcode.
//The java code gives error
//error : invalid column name
//While both are working fine and
//returning currect result in SQL Navigator.
Help me solve this mystery ?
Thanks in advance.
Swati.
<HR></BLOCKQUOTE>
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