Hi all, I'm observing odd results when using parentheses to group two or more terms in a solr query, some of which are negated (by prefixing the term with '-' or 'NOT ')
For example, in the current stable version of solr, I indexed the accompanying example docs: [EMAIL PROTECTED]:~/solr/example/exampledocs$ java -jar post.jar *.xml ...which contain information for two "video" related products: an ATI video card, and an iPod. So the following queriesy *should* return one hit, the ATI card: name:video AND (-features:podcasts) name:video AND (NOT features:podcasts) ...but they returns zero hits. Strangely, if I move the negation outside the parentheses, the queries properly return one result: name:video AND -(features:podcasts) name:video AND NOT (features:podcasts) Here are some other problematic queries that should return 1 result, but return zero: name:video AND (-features:podcasts) AND -features:itunes name:video AND (-features:podcasts AND -features:itunes) (name:video) AND (-features:podcasts) AND (-features:itunes) But these logically-equivalent queries return the correct results: name:video AND -features:podcasts AND -features:itunes (name:video AND -features:podcasts AND -features:itunes) name:video AND -(features:podcasts OR features:itunes) Generally whenever I include negations inside a grouping, Solr returns zero hits. The only exception to this is when I group the entire search. The following queries work properly: (name:video AND -features:podcasts) (name:video AND NOT features:podcasts) ...I suspect this is due to the parser simply stripping off the parentheses before further tokenizing the query. Is this a bug, or am I doing something wrong? It seems rather limiting to only allowing grouping of 'AND' and 'OR" operators, but not negation operators. Cheers, Aaron Suggs
