Mapping refcursors with object types in a procedure

Question

Hi all,
I need some help regarding the mapping of refcursors with object types .
Example: Procedure "A" has object types as input/output parameters which lies in the Web Method Application as a API.
We are creating a procedure "B" which has ref cursors as input/ouput parameters
which will map to the Procedure "A"'s object type parameters.
It will be highly needful for the solution.
Regards
Saugata

Answer 1

Your pseudocode has a lot of steps in it, but you didn't say which step you need help with. Since I already covered going from a nested table type to a refcursor, I'll assume you want an example that goes the other way now, like from a refcursor to a nested table type. Here's one ...
SQL>
SQL>
SQL> set serveroutput on
SQL>
SQL> create type nested_table_type as table of varchar2(14) ;
  2  /
Type created.
SQL> show errors
No errors.
SQL>
SQL>
SQL> create function func
  2    ( p_cursor in sys_refcursor )
  3    return nested_table_type
  4  as
  5    v_nested_table nested_table_type ;
  6  begin
  7
  8    fetch p_cursor bulk collect into v_nested_table ;
  9    return( v_nested_table );
10
11  end;
12  /
Function created.
SQL> show errors
No errors.
SQL>
SQL> select func( cursor( select dname from dept ) ) as nested_table from dual ;
NESTED_TABLE
NESTED_TABLE_TYPE('ACCOUNTING', 'RESEARCH', 'SALES', 'OPERATIONS')If your cursor selects objects instead of simple data types, the code is pretty much the same.
SQL> create type object_type as object ( c1 varchar2(14), c2 varchar2(13) );
  2  /
Type created.
SQL> show errors
No errors.
SQL>
SQL> create type nested_table_type as table of object_type ;
  2  /
Type created.
SQL> show errors
No errors.
SQL>
SQL>
SQL>
SQL> create function func
  2    ( p_cursor in sys_refcursor )
  3    return nested_table_type
  4  as
  5    v_nested_table nested_table_type ;
  6  begin
  7
  8    fetch p_cursor bulk collect into v_nested_table ;
  9    return( v_nested_table );
10
11  end;
12  /
Function created.
SQL> show errors
No errors.
SQL>
SQL> select
  2    func( cursor( select object_type( dname, loc ) from dept ) ) as object_table
  3  from dual ;
OBJECT_TABLE(C1, C2)
NESTED_TABLE_TYPE
  ( OBJECT_TYPE('ACCOUNTING', 'NEW YORK'),
    OBJECT_TYPE('RESEARCH', 'DALLAS'),
    OBJECT_TYPE('SALES', 'CHICAGO'),
    OBJECT_TYPE('OPERATIONS', 'BOSTON')
  )(NB I manually reformated the query results for clarity).