In general: BooleanQuery is a bad name, because it is not "just" Boolean algebra: - There are also "Boosts" involved - Also, the algebra consists of MUST, MUST_NOT and SHOULD. You cannot transform this easily to classical mathematical algebra :-)
See also: https://lucidworks.com/blog/why-not-and-or-and-not/ Uwe ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Ralf Heyde [mailto:ralf.he...@gmx.de] > Sent: Monday, February 02, 2015 4:28 PM > To: java-user@lucene.apache.org; java-user@lucene.apache.org > Subject: AW: Lucene Boolean Query Minimization > > Just an idea: could it be optimized by boolean Algebra? > > Gruss, Ralf > > Gesendet vom Mobiltelefon > > Originalnachricht > Von: Uwe Schindler > Gesendet: Montag, 2. Februar 2015 16:25 > An: java-user@lucene.apache.org > Antwort an: java-user@lucene.apache.org > Betreff: RE: Lucene Boolean Query Minimization > > Hi, > > You don't give an example of the type of Boolean query you want to > "minimize". I have no idea "how" it could be optimized without that > information. If a Boolean query contains only one clause, it is rewritten > automatically to be the query of its single clause (with boosts multiplied). > But > if you have many Boolean clauses, how could those be optimized? If you > have multiple term queries as clauses with identical terms, one could > optimize that by merging those clauses and add their boosts, but this is not > done automatically. > > Uwe > > ----- > Uwe Schindler > H.-H.-Meier-Allee 63, D-28213 Bremen > http://www.thetaphi.de > eMail: u...@thetaphi.de > > > > -----Original Message----- > > From: Apurv Verma [mailto:ap...@bloomreach.com] > > Sent: Monday, February 02, 2015 11:31 AM > > To: java-user@lucene.apache.org > > Subject: Lucene Boolean Query Minimization > > > > Hey all, > > I have a large boolean query in lucene which can be minimized to a > > smaller version with fewer clauses. Does Lucene automatically minimize > > complex boolean queries to simpler versions before executing them? > > > > If not, are there are predefined ways to do so? > > > > -- > > Regards, > > Apurv > > > --------------------------------------------------------------------- > 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 --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
