|Subject||Re: [firebird-support] SQL - performance|
> >The reason I wrote that, is that expression indices aren't neededwas
> >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
> faster than the other...not whether either offering was IN(best_choices).;-)
Oh, there should be an index on that column... said that already ;-)
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