possibly merge join bug?

i'm merge joining 2 data sources, one is oracle and the other is excel...the problem is in the oracle source, it's a sql statement like:

select hdr.div_ord_no, hdr.mtr_no, hdr.prod_cd
from qctrl_div_ord_header hdr,
(select max(sub.eff_dt_from) min_eff_dt_from, div_ord_no
from qctrl_div_ord_header sub
group by div_ord_no
) tmp
where hdr.eff_dt_from = tmp.min_eff_dt_from
and hdr.div_ord_no = tmp.div_ord_no

having that sql statement, merging will come out with 0 rows

however, having a simple query like:

select hdr.div_ord_no, hdr.mtr_no, hdr.prod_cd
from qctrl_div_ord_header hdr

merging will come out with 2 rows

you may think that the data in the first sql statement is not there for the merge, which causing the 0 rows, however, the data is there, i'm only joining by one column and definitely the data is there, the merge result should be 2 rows for both query statements

i believe this is a problem with SSIS, anyway around this?

Are the inputs to the MERGE JOIN sorted? I is a requirement that they are for MERGE JOIN to work correctly.

Note that setting IsSorted=Yes on the input does not mean that the data gets sorted for you!

-Jamie

|||yes, the input are sorted, everything should be setup correctly, hence, i got the merge to run and work as expected with the simple query