You are viewing a plain text version of this content. The canonical link for it is here.
Posted to java-user@lucene.apache.org by raj <ra...@gmail.com> on 2013/05/27 11:16:20 UTC
Difference between Group and Facet
Hi,
I was seeing that Lucene supports both Groups and Facets. But I was finding
it difficult to understand the difference between both.
https://issues.apache.org/jira/browse/LUCENE-1421 - Says "Ability to Group
search results by Field". So, is this by existing Fields that we add while
indexing or something different as in FacetFields in Facets?
Regards,
Rajesh
Re: Difference between Group and Facet
Posted by raj <ra...@gmail.com>.
Will update here if we finally decide to go with this. Looks like our
requirement can be accomplished with normal String fields
On Wed, May 29, 2013 at 7:55 AM, Brendan Grainger <
brendan.grainger@gmail.com> wrote:
> Great, did it work?
>
> By the way, If found this article:
> http://blog.thetaphi.de/2012/02/is-your-indexreader-atomic-major.html very
> helpful in understanding the difference between AtomicReaders and
> CompositeReaders.
>
> Brendan
>
>
>
> On Tue, May 28, 2013 at 2:30 AM, raj <ra...@gmail.com> wrote:
>
> > Thanks a lot Elisabeth
> >
> >
> > On Mon, May 27, 2013 at 7:43 PM, Elisabeth Adler
> > <el...@gmail.com>wrote:
> >
> > > Hi,
> > > I'm not sure what you mean with how to index a group. You basically
> index
> > > all documents, and then group them for the results.
> > > To stay on the books example: you index books including information
> about
> > > the author. So each document in the index is a book. But in your result
> > > list, you want to display authors. So you group by author.
> > >
> > > For the details about how to group, the package documentation (
> > > http://lucene.apache.org/core/4_0_0-ALPHA/grouping/index.html) should
> > > cover
> > > what you need.
> > > Best,
> > > Elisabeth
> > >
> > > On 27 May 2013 14:13, raj <ra...@gmail.com> wrote:
> > >
> > > > Hi,
> > > >
> > > > I wasnt able to find any guidelines on how to add a Group while
> > indexing.
> > > > There is a user guide and demo code for Facet which shows this. Can
> you
> > > > please show how to add a Group while indexing?
> > > >
> > > > Thanks,
> > > > Rajesh
> > > >
> > > >
> > > > On Mon, May 27, 2013 at 3:55 PM, raj <ra...@gmail.com>
> > wrote:
> > > >
> > > > > Hi Elisabeth,
> > > > >
> > > > > Thanks. Let me go through the links
> > > > >
> > > > > Regards,
> > > > > Rajesh
> > > > >
> > > > >
> > > > > On Mon, May 27, 2013 at 3:09 PM, Elisabeth Adler <
> > > > > elisabeth.adler@gmail.com> wrote:
> > > > >
> > > > >> Hi Rajesh,
> > > > >> This entry explains it quite well:
> > > > >>
> > > > >>
> > > >
> > >
> >
> http://stackoverflow.com/questions/8550818/whats-the-difference-between-grouping-and-facet-in-lucene-3-5
> > > > >> Best,
> > > > >> Elisabeth
> > > > >>
> > > > >> On 27 May 2013 11:16, raj <ra...@gmail.com> wrote:
> > > > >>
> > > > >> > Hi,
> > > > >> >
> > > > >> > I was seeing that Lucene supports both Groups and Facets. But I
> > was
> > > > >> finding
> > > > >> > it difficult to understand the difference between both.
> > > > >> >
> > > > >> > https://issues.apache.org/jira/browse/LUCENE-1421 - Says
> "Ability
> > > to
> > > > >> Group
> > > > >> > search results by Field". So, is this by existing Fields that we
> > add
> > > > >> while
> > > > >> > indexing or something different as in FacetFields in Facets?
> > > > >> >
> > > > >> >
> > > > >> > Regards,
> > > > >> > Rajesh
> > > > >> >
> > > > >>
> > > > >
> > > > >
> > > >
> > >
> >
>
>
>
> --
> Brendan Grainger
> www.kuripai.com
>
Re: Difference between Group and Facet
Posted by Brendan Grainger <br...@gmail.com>.
Great, did it work?
By the way, If found this article:
http://blog.thetaphi.de/2012/02/is-your-indexreader-atomic-major.html very
helpful in understanding the difference between AtomicReaders and
CompositeReaders.
Brendan
On Tue, May 28, 2013 at 2:30 AM, raj <ra...@gmail.com> wrote:
> Thanks a lot Elisabeth
>
>
> On Mon, May 27, 2013 at 7:43 PM, Elisabeth Adler
> <el...@gmail.com>wrote:
>
> > Hi,
> > I'm not sure what you mean with how to index a group. You basically index
> > all documents, and then group them for the results.
> > To stay on the books example: you index books including information about
> > the author. So each document in the index is a book. But in your result
> > list, you want to display authors. So you group by author.
> >
> > For the details about how to group, the package documentation (
> > http://lucene.apache.org/core/4_0_0-ALPHA/grouping/index.html) should
> > cover
> > what you need.
> > Best,
> > Elisabeth
> >
> > On 27 May 2013 14:13, raj <ra...@gmail.com> wrote:
> >
> > > Hi,
> > >
> > > I wasnt able to find any guidelines on how to add a Group while
> indexing.
> > > There is a user guide and demo code for Facet which shows this. Can you
> > > please show how to add a Group while indexing?
> > >
> > > Thanks,
> > > Rajesh
> > >
> > >
> > > On Mon, May 27, 2013 at 3:55 PM, raj <ra...@gmail.com>
> wrote:
> > >
> > > > Hi Elisabeth,
> > > >
> > > > Thanks. Let me go through the links
> > > >
> > > > Regards,
> > > > Rajesh
> > > >
> > > >
> > > > On Mon, May 27, 2013 at 3:09 PM, Elisabeth Adler <
> > > > elisabeth.adler@gmail.com> wrote:
> > > >
> > > >> Hi Rajesh,
> > > >> This entry explains it quite well:
> > > >>
> > > >>
> > >
> >
> http://stackoverflow.com/questions/8550818/whats-the-difference-between-grouping-and-facet-in-lucene-3-5
> > > >> Best,
> > > >> Elisabeth
> > > >>
> > > >> On 27 May 2013 11:16, raj <ra...@gmail.com> wrote:
> > > >>
> > > >> > Hi,
> > > >> >
> > > >> > I was seeing that Lucene supports both Groups and Facets. But I
> was
> > > >> finding
> > > >> > it difficult to understand the difference between both.
> > > >> >
> > > >> > https://issues.apache.org/jira/browse/LUCENE-1421 - Says "Ability
> > to
> > > >> Group
> > > >> > search results by Field". So, is this by existing Fields that we
> add
> > > >> while
> > > >> > indexing or something different as in FacetFields in Facets?
> > > >> >
> > > >> >
> > > >> > Regards,
> > > >> > Rajesh
> > > >> >
> > > >>
> > > >
> > > >
> > >
> >
>
--
Brendan Grainger
www.kuripai.com
Re: Difference between Group and Facet
Posted by raj <ra...@gmail.com>.
Thanks a lot Elisabeth
On Mon, May 27, 2013 at 7:43 PM, Elisabeth Adler
<el...@gmail.com>wrote:
> Hi,
> I'm not sure what you mean with how to index a group. You basically index
> all documents, and then group them for the results.
> To stay on the books example: you index books including information about
> the author. So each document in the index is a book. But in your result
> list, you want to display authors. So you group by author.
>
> For the details about how to group, the package documentation (
> http://lucene.apache.org/core/4_0_0-ALPHA/grouping/index.html) should
> cover
> what you need.
> Best,
> Elisabeth
>
> On 27 May 2013 14:13, raj <ra...@gmail.com> wrote:
>
> > Hi,
> >
> > I wasnt able to find any guidelines on how to add a Group while indexing.
> > There is a user guide and demo code for Facet which shows this. Can you
> > please show how to add a Group while indexing?
> >
> > Thanks,
> > Rajesh
> >
> >
> > On Mon, May 27, 2013 at 3:55 PM, raj <ra...@gmail.com> wrote:
> >
> > > Hi Elisabeth,
> > >
> > > Thanks. Let me go through the links
> > >
> > > Regards,
> > > Rajesh
> > >
> > >
> > > On Mon, May 27, 2013 at 3:09 PM, Elisabeth Adler <
> > > elisabeth.adler@gmail.com> wrote:
> > >
> > >> Hi Rajesh,
> > >> This entry explains it quite well:
> > >>
> > >>
> >
> http://stackoverflow.com/questions/8550818/whats-the-difference-between-grouping-and-facet-in-lucene-3-5
> > >> Best,
> > >> Elisabeth
> > >>
> > >> On 27 May 2013 11:16, raj <ra...@gmail.com> wrote:
> > >>
> > >> > Hi,
> > >> >
> > >> > I was seeing that Lucene supports both Groups and Facets. But I was
> > >> finding
> > >> > it difficult to understand the difference between both.
> > >> >
> > >> > https://issues.apache.org/jira/browse/LUCENE-1421 - Says "Ability
> to
> > >> Group
> > >> > search results by Field". So, is this by existing Fields that we add
> > >> while
> > >> > indexing or something different as in FacetFields in Facets?
> > >> >
> > >> >
> > >> > Regards,
> > >> > Rajesh
> > >> >
> > >>
> > >
> > >
> >
>
Re: Difference between Group and Facet
Posted by Elisabeth Adler <el...@gmail.com>.
Hi,
I'm not sure what you mean with how to index a group. You basically index
all documents, and then group them for the results.
To stay on the books example: you index books including information about
the author. So each document in the index is a book. But in your result
list, you want to display authors. So you group by author.
For the details about how to group, the package documentation (
http://lucene.apache.org/core/4_0_0-ALPHA/grouping/index.html) should cover
what you need.
Best,
Elisabeth
On 27 May 2013 14:13, raj <ra...@gmail.com> wrote:
> Hi,
>
> I wasnt able to find any guidelines on how to add a Group while indexing.
> There is a user guide and demo code for Facet which shows this. Can you
> please show how to add a Group while indexing?
>
> Thanks,
> Rajesh
>
>
> On Mon, May 27, 2013 at 3:55 PM, raj <ra...@gmail.com> wrote:
>
> > Hi Elisabeth,
> >
> > Thanks. Let me go through the links
> >
> > Regards,
> > Rajesh
> >
> >
> > On Mon, May 27, 2013 at 3:09 PM, Elisabeth Adler <
> > elisabeth.adler@gmail.com> wrote:
> >
> >> Hi Rajesh,
> >> This entry explains it quite well:
> >>
> >>
> http://stackoverflow.com/questions/8550818/whats-the-difference-between-grouping-and-facet-in-lucene-3-5
> >> Best,
> >> Elisabeth
> >>
> >> On 27 May 2013 11:16, raj <ra...@gmail.com> wrote:
> >>
> >> > Hi,
> >> >
> >> > I was seeing that Lucene supports both Groups and Facets. But I was
> >> finding
> >> > it difficult to understand the difference between both.
> >> >
> >> > https://issues.apache.org/jira/browse/LUCENE-1421 - Says "Ability to
> >> Group
> >> > search results by Field". So, is this by existing Fields that we add
> >> while
> >> > indexing or something different as in FacetFields in Facets?
> >> >
> >> >
> >> > Regards,
> >> > Rajesh
> >> >
> >>
> >
> >
>
Re: Difference between Group and Facet
Posted by raj <ra...@gmail.com>.
Hi,
I wasnt able to find any guidelines on how to add a Group while indexing.
There is a user guide and demo code for Facet which shows this. Can you
please show how to add a Group while indexing?
Thanks,
Rajesh
On Mon, May 27, 2013 at 3:55 PM, raj <ra...@gmail.com> wrote:
> Hi Elisabeth,
>
> Thanks. Let me go through the links
>
> Regards,
> Rajesh
>
>
> On Mon, May 27, 2013 at 3:09 PM, Elisabeth Adler <
> elisabeth.adler@gmail.com> wrote:
>
>> Hi Rajesh,
>> This entry explains it quite well:
>>
>> http://stackoverflow.com/questions/8550818/whats-the-difference-between-grouping-and-facet-in-lucene-3-5
>> Best,
>> Elisabeth
>>
>> On 27 May 2013 11:16, raj <ra...@gmail.com> wrote:
>>
>> > Hi,
>> >
>> > I was seeing that Lucene supports both Groups and Facets. But I was
>> finding
>> > it difficult to understand the difference between both.
>> >
>> > https://issues.apache.org/jira/browse/LUCENE-1421 - Says "Ability to
>> Group
>> > search results by Field". So, is this by existing Fields that we add
>> while
>> > indexing or something different as in FacetFields in Facets?
>> >
>> >
>> > Regards,
>> > Rajesh
>> >
>>
>
>
Re: Difference between Group and Facet
Posted by raj <ra...@gmail.com>.
Hi Elisabeth,
Thanks. Let me go through the links
Regards,
Rajesh
On Mon, May 27, 2013 at 3:09 PM, Elisabeth Adler
<el...@gmail.com>wrote:
> Hi Rajesh,
> This entry explains it quite well:
>
> http://stackoverflow.com/questions/8550818/whats-the-difference-between-grouping-and-facet-in-lucene-3-5
> Best,
> Elisabeth
>
> On 27 May 2013 11:16, raj <ra...@gmail.com> wrote:
>
> > Hi,
> >
> > I was seeing that Lucene supports both Groups and Facets. But I was
> finding
> > it difficult to understand the difference between both.
> >
> > https://issues.apache.org/jira/browse/LUCENE-1421 - Says "Ability to
> Group
> > search results by Field". So, is this by existing Fields that we add
> while
> > indexing or something different as in FacetFields in Facets?
> >
> >
> > Regards,
> > Rajesh
> >
>
Re: Difference between Group and Facet
Posted by Elisabeth Adler <el...@gmail.com>.
Hi Rajesh,
This entry explains it quite well:
http://stackoverflow.com/questions/8550818/whats-the-difference-between-grouping-and-facet-in-lucene-3-5
Best,
Elisabeth
On 27 May 2013 11:16, raj <ra...@gmail.com> wrote:
> Hi,
>
> I was seeing that Lucene supports both Groups and Facets. But I was finding
> it difficult to understand the difference between both.
>
> https://issues.apache.org/jira/browse/LUCENE-1421 - Says "Ability to Group
> search results by Field". So, is this by existing Fields that we add while
> indexing or something different as in FacetFields in Facets?
>
>
> Regards,
> Rajesh
>