It looks like the code constructing the boost phrase for pf will always add a trailing blank, which is never a problem when a normal tokenizer is used that removes white space, but the keyword tokenizer will preserve that extra space, which prevents an exact match.
See line 531: https://github.com/apache/lucene-solr/blob/releases/lucene-solr/5.5.0/solr/core/src/java/org/apache/solr/search/ExtendedDismaxQParser.java I'd say it's a bug, but more a narrow use case that wasn't considered or tested. -- Jack Krupansky On Tue, Apr 5, 2016 at 7:50 AM, <jimi.hulleg...@svensktnaringsliv.se> wrote: > Hi, > > I'm trying to boost documents using a phrase field boosting (ie the pf > parameter for edismax), but I can't get it to work (ie boosting documents > where the pf field match the query as a phrase). > > As far as I can tell, solr, or more specifically the edismax handler, does > *something* when I add this parameter. I know this because the QTime > increases from around 5-10ms to around 30-40 ms, and the score explain > structure is *slightly* modified (though with the same final score for all > documents). But nowhere in the explain structure can I see anything about > the pf. And I can't understand that. Shouldn't it be included in the > explain? If not, is there any way to force it to be included somehow? > > The query looks something like this: > > > ?q=some+words&rows=10&sort=score+desc&debugQuery=true&fl=objectid,exactTitle,score%2C%5Bexplain+style%3Dtext%5D&qf=title%5E2&qf=swedishText1%5E1&defType=edismax&pf=exactTitle%5E5&wt=xml&indent=true > > > I have one document that has the title "some words", and when I do a > simple query filter with exactTitle:"some words" I get a match for that > document. So then I would expect that the query above would boost this > document, and include information about this in the explain. But nothing > like this happens, and I can't understand why. > > The field looks like this: > > <field name="exactTitle" type="keywordText" indexed="true" stored="true" > required="false" multiValued="false" /> > > And the fieldType looks like this: > > <fieldType name="keywordText" class="solr.TextField" > positionIncrementGap="100"> > <analyzer> > <charFilter > class="solr.HTMLStripCharFilterFactory" /> > <tokenizer > class="solr.KeywordTokenizerFactory" /> > <filter > class="solr.LowerCaseFilterFactory" /> > </analyzer> > </fieldType> > > > I have also tried boosting this document using a boost query, ie > bq=exactTitle:"some words", and this works as expected. The document score > is boosted, and the explain states this very clearly, with this segment: > > [...] > 9.870669 = (MATCH) weight(exactTitle:some words^5.0 in 12) > [DefaultSimilarity], result of: > [...] > > Why is this working, but q=some+words&pf=exactTitle^5 not? Shouldn't > edismax rewrite my "pf query" into something very similar to the "bq query"? > > Regards > /Jimi >
