[ https://issues.apache.org/jira/browse/LUCENE-3097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13069536#comment-13069536 ]
Michael McCandless commented on LUCENE-3097: -------------------------------------------- Hmm I hit a test failure w/ this patch: {noformat} ant test -Dtestcase=TermAllGroupHeadsCollectorTest -Dtestmethod=testRetrieveGroupHeadsAsArrayAndOpenBitset -Dtests.seed=-8084704095495262480:-1926953444883897447 {noformat} Also: can this collector use the new FixedBitSet instead of OpenBitSet...? > Post grouping faceting > ---------------------- > > Key: LUCENE-3097 > URL: https://issues.apache.org/jira/browse/LUCENE-3097 > 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-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 counts. > 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 statistics. > 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. For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org