Aha, that did the trick! Somehow I'd missed that requirement of specifying the type...
Anyway, thanks a lot for the quick reply! :) On Monday, 21 December 2015 16:48:03 UTC, Michael Bayer wrote: > > > > try having the SQL expression itself also be of type MySpecialByteA: > > return func.sql_side_process(col, type_=self) # e.g. self == > MySpecialByteA > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
