PROCEDURE UPSERT_TEST_BY_MERGE_COL( p_records MY_UPSERT_TYP) IS
BEGIN FORALL i IN 1..p_records.COUNT
MERGE INTO MY_UPSERT_TEST_TABLE DEST
USING( SELECT TREAT(p_records(i) AS My_Upsert_Obj) AS obj FROM DUAL ) src
ON (DEST.ID = src.obj.id)
WHEN MATCHED THEN
UPDATE SET DEST.DATA = src.obj.data
WHEN NOT MATCHED THEN
INSERT (id, data) VALUES( src.obj.id, src.obj.data );
END;

Thanks
Ram