Join with expressions?

["Fromen, Paul V" <paul.v.fromen@USAGO.KSC.NASA.GOV>]

Hello everyone,

In the GUI version for SQR workbench (4.1.1) is it possible to join two
tables using an expression like substring on one side of the join?  I know I
can do it once the SQR code is created, but am stumped as to how it's done
in the GUI report builder. If not, was this added in a newer version?

Thanks,
        Paul