Thanks, Erik. If PhraseQuery does not keep track of all matching spans, how does it do its work (in comparison to SpanNearQuery)?
Regards, Em Am 21.09.2011 19:52, schrieb Erik Hatcher: > SpanNearQuery does more work than PhraseQuery - it keeps track of all > matching spans, whereas PhraseQuery does not. Whether the performance > difference will be relevant depends on your environment and data - so it may > not be a big deal at all. > > Erik > > > On Sep 21, 2011, at 10:44 , Em wrote: > >> Hi Erik, >> >> could you explain why PhraseQuery performs better than SpanNearQuery? >> >> Some time has passed since I read about it, however I think it was >> exactly the other way round. >> >> Thanks! >> >> Em >> >> Am 21.09.2011 15:56, schrieb Erik Hatcher: >>> PhraseQuery suffices for the stated requirement of boosting when query >>> terms are closer. A common technique is to incorporate a PhraseQuery with >>> a large slop factor of the query terms into the query automatically, which >>> implicitly boosts matching documents when the query terms are closer. A >>> SpanNearQuery would work too, but a PhraseQuery might be easier to >>> incorporate and will be faster performing. >>> >>> Erik >>> >>> On Sep 21, 2011, at 05:31 , Akos Tajti wrote: >>> >>>> Thanks, I will check SpanNearQuery! >>>> >>>> Regards, >>>> Ákos >>>> >>>> >>>> >>>> >>>> On Wed, Sep 21, 2011 at 2:20 PM, Em <mailformailingli...@yahoo.de> wrote: >>>> >>>>> Àkos, >>>>> >>>>> have a look at SpanNearQuery. This is what you want. >>>>> If you own the 2nd Edition of Lucene in Action have a look at their >>>>> examples. It illustrates how to combine them with the classical queries. >>>>> >>>>> Regards, >>>>> Em >>>>> >>>>> Am 21.09.2011 13:46, schrieb Akos Tajti: >>>>>> Dear List, >>>>>> >>>>>> for multi term expressions I'd like to add higher rank if the matches are >>>>>> closer to each other. For example for the search term "like eating" the >>>>>> string "i like eating" comes before "I like some eating". >>>>>> >>>>>> Is this possible? >>>>>> >>>>>> Thanks in advance, >>>>>> >>>>>> Ákos Tajti >>>>>> >>>>> >>>>> --------------------------------------------------------------------- >>>>> 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 >> > > > --------------------------------------------------------------------- > 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
