<Rob>
Instead of a cross system join (which IBM rejected my RFE on that BTW) I wonder if you could use a UDTF to mask that to the consumer which would, in effect, do the cross system join?
</Rob>

a UDTF is only some view with parameters and sitting on the same database as the tables it uses. There is always a two step solution: get the remote tables to your machine and afterwards you could join (that's what SQL Server does under the cover and DB2 federation server too). If you are dealing with lots of data, this would be slow (as it is). Additional you would have some problems with data in change.

The only fast way, I could think about, is to replicate one of the tables to the other database. This could be even made transaction safe.

D*B

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