Logs filling up on reports

We have a table that has billions and billions (almost) rows in it. Users can query this raw data to do their own reporting criteria. Purely for reporting, these queries build temporary tables for order by's and writing to these fills up the logs so the transaction ends up abending. Is there any way to turn logging off on these temporary tables that Informix allocates internally? We are on 5.03 right now, moving to 5.06. Ray