The facetious answer is "when phrases aren't important in the fields". If you're doing a simple boolean match, adding phrase fields will add expense, to no good purpose etc. Phrases on numeric fields seems wrong.
FWIW, Erick On Mon, Oct 28, 2013 at 1:03 AM, Amit Nithian <[email protected]> wrote: > Hi all, > > I have been using Solr for years but never really stopped to wonder: > > When using the dismax/edismax handler, when do you have the qf different > from the pf? > > I have always set them to be the same (maybe different weights) but I was > wondering if there is a situation where you would have a field in the qf > not in the pf or vice versa. > > My understanding from the docs is that qf is a term-wise hard filter while > pf is a phrase-wise boost of documents who made it past the "qf" filter. > > Thanks! > Amit >
