why dont you look and see how expressions is doing it? On Fri, Sep 20, 2013 at 11:39 AM, Shai Erera <[email protected]> wrote: > Thanks Rob. So is there a NumericDVFieldSource-like in Lucene? I think it's > important that we have one. > > Shai > > > On Fri, Sep 20, 2013 at 6:10 PM, Robert Muir <[email protected]> wrote: >> >> thats what it does. its more like a computed field. and you can sort >> by more than one of them. >> >> please see the JIRA issue for a description of the differences between >> function queries. >> >> On Fri, Sep 20, 2013 at 10:49 AM, Shai Erera <[email protected]> wrote: >> > Yes, you're right, but that's unrelated to this thread. I passed >> > doScore=true and the scores come out the same, meaning Expression didn't >> > affect the actual score, only the sort-by value (which is ok). >> > >> > search Expression >> > doc=1, score=0.37158427, field=0.7431685328483582 >> > doc=0, score=0.37158427, field=0.3715842664241791 >> > >> > Shai >> > >> > >> > On Fri, Sep 20, 2013 at 5:10 PM, Robert Muir <[email protected]> wrote: >> >> >> >> On Fri, Sep 20, 2013 at 8:01 AM, Shai Erera <[email protected]> wrote: >> >> > >> >> > Expression >> >> > I tried the new module, following TestDemoExpression and compiled the >> >> > expression using this code: >> >> > >> >> > Expression expr = JavascriptCompiler.compile("_score * boost"); >> >> > SimpleBindings bindings = new SimpleBindings(); >> >> > bindings.add(new SortField("_score", SortField.Type.SCORE)); >> >> > bindings.add(new SortField("boost", SortField.Type.LONG)); >> >> > >> >> > The result scores are: >> >> > >> >> > search Expression >> >> > doc=1, score=NaN, field=0.7431685328483582 >> >> > doc=0, score=NaN, field=0.3715842664241791 >> >> > >> >> > As you can see, both CustomScoreProvider and Expression methods >> >> > return >> >> > same >> >> > scores for the docs, while the FunctionQuery method returns different >> >> > scores. The reason is that when using FunctionQuery, the scores of >> >> > the >> >> > ValueSources are multiplied by queryWeight, which seems correct to >> >> > me. >> >> > >> >> > Expression is more about sorting than scoring as far as I understand >> >> > (for >> >> > instance, the result FieldDocs.score is NaN) >> >> >> >> Why does that come as a surprise to you? Pass true to indexsearcher >> >> to get the documents score back here. >> >> >> >> ======================= Release 2.9.0 2009-09-23 >> >> ======================= >> >> >> >> Changes in backwards compatibility policy >> >> >> >> LUCENE-1575: Searchable.search(Weight, Filter, int, Sort) no longer >> >> computes a document score for each hit by default. >> >> ... (Shai Erera via Mike McCandless) >> >> >> >> --------------------------------------------------------------------- >> >> To unsubscribe, e-mail: [email protected] >> >> For additional commands, e-mail: [email protected] >> >> >> > >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >
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