Ref cursor, appending data

Question

Hi All, i am using C# to connect execute a oracle sp and getting the results back using a ref cursor.
CREATE OR REPLACE
PACKAGE BODY DellSalesTool
AS
PROCEDURE MainScreenData1
(cur_messages1 OUT cursor_type)
as
begin
     OPEN cur_messages1 for SELECT * FROM ST_LOB;
end;
PROCEDURE MainScreenData
               (cur_messages OUT cursor_type)
AS
     scid number;
     lobid number;
     msgid number;
     CURSOR Lob_Cursor IS SELECT DISTINCT LOB_ID     FROM ST_LOB;
     CURSOR Category_Cursor IS SELECT DISTINCT SC_ID     FROM ST_CATEGORY;
     RT_CATEGORY          Category_Cursor%ROWTYPE;
     RT_LOB               Lob_Cursor%ROWTYPE;
     BEGIN
     OPEN Category_Cursor;
     LOOP
     FETCH Category_Cursor INTO RT_CATEGORY;
     EXIT WHEN Category_Cursor%NOTFOUND;
               OPEN Lob_Cursor;
               LOOP
               FETCH Lob_Cursor INTO RT_LOB;
               EXIT WHEN Lob_Cursor%NOTFOUND;
               SELECT MAX(MSG_ID) INTO msgid FROM ST_VW_MAIN
               WHERE msg_priority = 1 AND sc_id = RT_CATEGORY.SC_ID
               AND lob_id = 1
               AND msg_date = (
                                   SELECT MAX(msg_date) FROM ST_VW_MAIN
                                   WHERE msg_priority = 1
                                   AND sc_id = RT_CATEGORY.SC_ID
                                   AND lob_id = 1);
               OPEN cur_messages FOR
               SELECT * FROM (
                    SELECT * FROM ST_VW_MAIN
                    WHERE msg_id = msgid
                    AND sc_id = RT_CATEGORY.SC_ID
                    AND lob_id = RT_LOB.LOB_ID
               ) b
               UNION
               SELECT * FROM (
                    SELECT * FROM ST_VW_MAIN
                    WHERE sc_id = RT_CATEGORY.SC_ID
                    AND LOB_ID = RT_LOB.LOB_ID
                    AND MSG_ID NOT IN (msgid)
                    ORDER BY msg_date desc
               ) a;
          END LOOP;
          CLOSE Lob_Cursor;
     END LOOP;
     CLOSE Category_Cursor;
     END;
END;
Now the issue is since the ref cursor is opened multiple times in the main cursor, i get the last result back in the c#. Any way using which i can append the records in the ref cursor..

Answer 1

In the first part of the UNION you have "msg_id = msgid" and the second SELECT you have "msg_id not in (msgid)"?
Do you want it that way? Are you trying to exclude NULL msg_id values?
SELECT *
  FROM (SELECT *
          FROM ST_VW_MAIN
         WHERE sc_id = RT_CATEGORY.SC_ID AND lob_id = RT_LOB.LOB_ID and
               msg_id = msgid) b
UNION
SELECT *
  FROM (SELECT *
          FROM ST_VW_MAIN
         WHERE sc_id = RT_CATEGORY.SC_ID AND LOB_ID = RT_LOB.LOB_ID AND
               MSG_ID NOT IN (msgid))
ORDER BY msg_date DESC