Hi, Finally, to "fix" it so it behaves like you may want it: just add a MatchAllDocsQuery as MUST or SHOULD clause. You have full control on how it behaves!
Uwe Am November 6, 2020 6:05:03 PM UTC schrieb Nissim Shiman <nshi...@yahoo.com.INVALID>: > Thank You Erick and Adrien! >On Friday, November 6, 2020, 08:43:59 AM EST, Erick Erickson ><erickerick...@gmail.com> wrote: > > Nissim: > >Here’s a good explanation of why it was designed this way >if you’d like details: > >https://lucidworks.com/post/why-not-and-or-and-not/ > >Don’t be put off by the Solr title, it’s really about >BooleanQuery and BooleanClause > >Best, >Erick > >> On Nov 6, 2020, at 8:17 AM, Adrien Grand <jpou...@gmail.com> wrote: >> >> Hi Nissim, >> >> This is by design: boolean queries that don't have positive clauses >like >> empty boolean queries or boolean queries that only consist of >negative >> (MUST_NOT) clauses don't match any hits. >> >> On Thu, Nov 5, 2020 at 9:07 PM Nissim Shiman ><nshi...@yahoo.com.invalid> >> wrote: >> >>> Hello Apache Lucene team members, >>> I have found that constructing a BooleanQuery with just >>> a BooleanClause.Occur.MUST_NOT will return no results. It will >return >>> results is if there is also a BooleanClause.Occur.MUST as part of >the query >>> as well though. >>> >>> >>> I don't see this limitation with a BooleanQuery with just >>> a BooleanClause.Occur.MUST (i.e. results will return fine if they >match). >>> >>> Is this by design or is this an issue? >>> >>> Thanks You, >>> Nissim Shiman >> >> >> >> -- >> Adrien > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >For additional commands, e-mail: java-user-h...@lucene.apache.org > -- Uwe Schindler Achterdiek 19, 28357 Bremen https://www.thetaphi.de
