Hi Uwe, thanks for the reply. TermInSetQuery cover most of my use case: - thousands of term values (also 100,000) - no need for scoring, because it's calculated elsewhere - intersect with normal full text query for further filtering
Using a TermQuery do I risk to hit the BooleanQuery.getMaxClauseCount() limit? Cheers, Nicola On Mon, 2018-06-25 at 16:52 +0200, Uwe Schindler wrote: > Hi, > > the TermInSetQuery is a so-called Constant Score Query. It is more > meant as a filter, so you would need some "real" fulltext query in > parallel. See the term-in-set query more like the SQL "IN" operator. > It can be used to pass lots of identifiers to filter results (e.g. > when you apply access rights or group policies for filtering users to > your main query as a filter). > > As it is a "set", which is by default unordered, the order of terms > in the set is undefined. Internally TermInSetQuery reorders the terms > to improve processing speed. > > If you need scoring, use TermQuery wrapped by a BooleanQuery. Then > you can apply some boosts to some terms to improve order (e.g. boost > term queries coming first) and apply on a field without norms. > > TermInSetQuery is fast because it neglects scoring and is just good > at intersecting the terms dict with the given terms set. > > Uwe > > ----- > Uwe Schindler > Achterdiek 19, D-28357 Bremen > http://www.thetaphi.de > eMail: u...@thetaphi.de > > > -----Original Message----- > > From: Nicola Buso <nb...@ebi.ac.uk> > > Sent: Monday, June 25, 2018 1:23 PM > > To: java-user@lucene.apache.org > > Subject: TermInSetQuery keep terms order in results > > > > Hi, > > > > I need to use the TermInSetQuery, but I would like to keep the > > sorting > > of the results based on the term set order provided. Currently > > seems > > using a index documents insertion order in the results. > > > > Is this already implemented somewhere or do I need to implement a > > CustomScoreQuery to calculate this score? > > > > Cheers, > > > > > > Nicola > > > > > > -- > > Nicola Buso <nb...@ebi.ac.uk> > > EMBL-EBI > > > > ----------------------------------------------------------------- > > ---- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
