lucene_list at iconparc
Aug 3, 2012, 5:26 AM
Post #3 of 3
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Re: ToParentBlockJoinQuery - Faceting on Parent and Child Documents
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Hi Jayendra,
we use facetting and blockjoinqueries on lucene 3.6 like this:
- Create the FacetsCollector
- For facetting on Parent documents, use ToParentBlockJoinQuery, for
facetting on children ToChildBlockJoinQuery (if needed, add additional
query clauses using a Booleanquery)
- Use searcher.search(query,null,facetCollector)
This seems to work fine.
Best regards,
Christoph Kaser
Am 03.08.2012 13:50, schrieb Martijn v Groningen:
> Hi Jayendra,
>
> This isn't supported yet. You could implement this by creating a
> custom Lucene collector.
> This collector could count the unique hits inside a block of docs per
> unique facet field value. The
> unique facet values could be retrieved from Lucene's FieldCache or doc
> values (if you can use Lucene 4.0
> in your project).
>
> In general I think this would be a cool addition!
>
> Martijn
>
> On 25 July 2012 13:37, Jayendra Patil <jayendra.patil.001 [at] gmail> wrote:
>> Thanks Mike for the wonderful work on ToParentBlockJoinQuery.
>>
>> We had a use case for Relational data search and are working with
>> ToParentBlockJoinQuery which works perfectly as mentioned @
>> http://blog.mikemccandless.com/2012/01/searching-relational-content-with.html
>>
>> However, I couldn't find any examples on net or even in the JUnit
>> testcases to use Faceting on the Parent or the Child results.
>>
>> Is it supported as yet ??? Can you provide us with any examples ??
>>
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