docFreq disable / disable end of word letter removal
Hello, for my specific project, I would like to ask if the following settings can be made on the solr system: - Currently, I see that the docFreq is also playing in the scoring. Is is possible to disable this feature so that this is not calculated in the score ? - I see that solr is stripping some characters at the end of the search words. This is okay, but i try, for example, a search on "comed", and he is searching for "come". Can I select when the system will remove which letters and when ? Or where can I disable this system ? The removal of the trailing "s" is great, but for some circumstances, the "d" removal of "comed" is not the ideal way. Thanks for the help And thanks for the really great tool solr is Tom
how to use FunctionQuery with lucene?
Hi, FunctionQuery looks _exactly_ like what I want. I want to apply a rank/sort kind of thing based on the value of a Document field value. Specifically, my users want more "recent" documents to have a higher rank than older documents and I have a date field with values like 20060707. It looks like I can do what I want with a LinearFloatFunction :-) I'm using lucene's query parser to get a Query. How can I use FunctionQuery in conjunction with my existing query? I'm gonna _try_ Query.combine(Query[]), but I'm not sure, from reading the lucene docs, that it will do what I want... Many thanks! Brent
Re: docFreq disable / disable end of word letter removal
:- Currently, I see that the docFreq is also playing in the : scoring. Is is possible to disable this feature so that this is not : calculated in the score ? this is a fairly core aspect of the Lucene scoring calculation, but it can be changed with a small bit of java coding. If you write your own subclass of "Similarity" you can override the "idf" function to return a constanct value regardless of the docFreq. You can then specify your new Similarity class by name in your schema.xml and Solr will use it instead of the default... http://lucene.apache.org/java/docs/api/org/apache/lucene/search/Similarity.html :- I see that solr is stripping some characters at the end of the : search words. This is okay, but i try, for example, a search on : "comed", and he is searching for "come". Can I select when the system : will remove which letters and when ? Or where can I disable this : system ? The removal of the trailing "s" is great, but for some : circumstances, the "d" removal of "comed" is not the ideal way. This is all determined by the Analyzer used for each field (or more generally: field type) ... this is also configured via the schema.xml. As with SImilarity, you can write your own java subclass to use if you want extremely customized behavior, or you can use any of the Analyzers that come with lucene (by name) or you can build up an Analyzer in your schema.xml using solr TokenizerFactories and TokenFilterFactories. Docs on all of the Solr Factories can be found in the wiki... http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters http://lucene.apache.org/java/docs/api/org/apache/lucene/analysis/Analyzer.html -Hoss
Re: how to use FunctionQuery with lucene?
: FunctionQuery looks _exactly_ like what I want. I want to apply a rank/sort : kind of thing based on the value of a Document field value. Specifically, my : users want more "recent" documents to have a higher rank than older documents : and I have a date field with values like 20060707. It looks like I can do : what I want with a LinearFloatFunction :-) pretty much ... but RecipricalFloatFunction is pretty great for dates too. : I'm using lucene's query parser to get a Query. How can I use : FunctionQuery in conjunction with my existing query? I'm gonna _try_ : Query.combine(Query[]), but I'm not sure, from reading the lucene docs, : that it will do what I want... that's not really what that method is for ... just construct a BooleanQuery and add your FunctionQuery and the query you got from the QUeryParser to it as sub-clauses. You'll probably want the clause from QUeryParser to be mandatory, and the FunctionQUery to be optional. -Hoss
Re: how to use FunctionQuery with lucene?
[2006-07-12 11:55] Chris Hostetter said: | pretty much ... but RecipricalFloatFunction is pretty great for dates too. Will have to check it out :-) | : Query.combine(Query[]), but I'm not sure, from reading the lucene docs, | : that it will do what I want... | | that's not really what that method is for ... just construct a | BooleanQuery and add your FunctionQuery and the query you got from the Yeah, I dug through query parser and saw that BooleanQuery was used to combine queries. BTW, _very_ nice work on solr. I'm only using a little bit of it in my current project, but I suspect I'll take advantage of some of the other bits in the future! cheers! Brent
