> >The reason I wrote that, is that expression indices aren't needed
> >for this to be optimized.
> >
> >I'm not fully aware of what expression indices should be able
> >to do anyway. I picture usage as UPPER(column) = 'value'
> >and an Upper(Column) index...
>
> ..or a SUBSTRING(Column FROM m FOR n) index...?
>
> (Just getting back to the original question...whether one form of query

was

> faster than the other...not whether either offering was IN(best_choices).

;-)

Oh, there should be an index on that column... said that already ;-)

With regards,

Martijn Tonies
Database Workbench - developer tool for InterBase, Firebird, MySQL & MS SQL
Server.
Upscene Productions
http://www.upscene.com