I'm in the process of trying to get direct access to tables used in a bioquery...I just wanted to look here beforehand to make sure that Tableau doesn't support .bqy files...and if anyone has found a workaround??
Is that Brio Query Files?
If yes then Tableau won't be able to open those however you should be able to export those from Hyperion client via File>Export menu (I'd pick Excel file format).
Retrieving data ...