Call stored function return array

Question

Hi all,
I have a function as follow:
create or replace TYPE string_table IS TABLE OF VARCHAR2(2000);
create or replace TYPE ARRAYTYPE is VARRAY(20) OF VARCHAR2(30);
create or replace FUNCTION getEmpArray(s varchar2, t varchar2, st string_table) RETURN ARRAYTYPE AS
l_data ARRAYTYPE := ARRAYTYPE();
BEGIN
l_data.extend; l_data(l_data.count) := s; l_data.extend; l_data(l_data.count) := t; l_data.extend; l_data(l_data.count) := st(1); RETURN l_data;
END;
I want to call this function by StoredFunctionCall
code:
StoredFunctionCall fun = new StoredFunctionCall();
fun.setProcedureName("getEmpArray".toUpperCase());
Object[] arr = new Object[]{"aa", "fgfg", "bbb"};
ArrayDescriptor arrDescriptor =
ArrayDescriptor.createDescriptor("string_table".toUpperCase(),
connection);
ARRAY arrayToPass = new ARRAY(arrDescriptor, connection, arr);
fun.addUnamedArgumentValue("a");
fun.addUnamedArgumentValue("b");
fun.addUnamedArgumentValue(arrayToPass);
fun.setResult("FUNCTION_RESULT"); // for get result by this name
Vector<DatabaseRecord> list = session.executeSelectingCall(fun);
But Exception
PLS-00382: expression is of wrong type
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
Error Code: 6550
Call: BEGIN ? := GETEMPARRAY(?, ?, ?); END;
     bind => [=> FUNCTION_RESULT, a, b, oracle.sql.ARRAY@21fbc01]
Please help me
Edited by: fbg on 21:52 26-04-2010

Answer 1

A few issues,
1 - JDBC does not support the PLSQL TABLE type, you must use a VARRAY type, or wrap the TABLE function call in a function that takes a VARRAY.
TopLink also has support for PLSQL types in its PLSQLStoredProcedureCall class, but no support is currently offered for StoredFunctions.
You can't pass the VARRAY type for the TABLE argument.
2 - Your function returns a VARRAY, so you need to define this type in the StoredFunctionCall result.
We don't currently expose the API to set a Array type for the result, so you would need to access the call's first parameter directly, or use a StoredProcedureCall (and convert your function to a procedure).
You may also wish to investigate returning a cursor from a stored procedure instead of the varray.
You could also access the JDBC connection directly and perform the call using JDBC code.
Feel free to log these issues in EclipseLink.
James : www.eclipselink.org