lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Ian Grainger (Commented) (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3097) Post grouping faceting
Date Wed, 07 Dec 2011 16:24:41 GMT


Ian Grainger commented on LUCENE-3097:

Oh, sorry- I just read the previous comment _properly_ - So the case I need fixing is [SOLR-2898|]?
> Post grouping faceting
> ----------------------
>                 Key: LUCENE-3097
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: modules/grouping
>            Reporter: Martijn van Groningen
>            Assignee: Martijn van Groningen
>            Priority: Minor
>             Fix For: 3.4, 4.0
>         Attachments: LUCENE-3097.patch, LUCENE-3097.patch, LUCENE-3097.patch, LUCENE-3097.patch,
LUCENE-3097.patch, LUCENE-30971.patch
> This issues focuses on implementing post grouping faceting.
> * How to handle multivalued fields. What field value to show with the facet.
> * Where the facet counts should be based on
> ** Facet counts can be based on the normal documents. Ungrouped counts. 
> ** Facet counts can be based on the groups. Grouped counts.
> ** Facet counts can be based on the combination of group value and facet value. Matrix
> And properly more implementation options.
> The first two methods are implemented in the SOLR-236 patch. For the first option it
calculates a DocSet based on the individual documents from the query result. For the second
option it calculates a DocSet for all the most relevant documents of a group. Once the DocSet
is computed the FacetComponent and StatsComponent use one the DocSet to create facets and
> This last one is a bit more complex. I think it is best explained with an example. Lets
say we search on travel offers:
> |||hotel||departure_airport||duration||
> |Hotel a|AMS|5
> |Hotel a|DUS|10
> |Hotel b|AMS|5
> |Hotel b|AMS|10
> If we group by hotel and have a facet for airport. Most end users expect (according to
my experience off course) the following airport facet:
> AMS: 2
> DUS: 1
> The above result can't be achieved by the first two methods. You either get counts AMS:3
and DUS:1 or 1 for both airports.

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:!default.jspa
For more information on JIRA, see:


To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message