OK, then why shouldn't there be a special function to assess the cost of the beer in any specified currency at the time of the query? Should there be special f

OK, then why shouldn't there be a special function to assess the cost of the beer in any specified currency at the time of the query? Should there be special functions for querying the characteristics of JPEGs stored as BLOBs? How about PNGs? Where does this end? Just because a couple of float values happen to represent latitude and longitude doesn't mean the DB engine should integrate geospatial logic.