Not necessarily collapse.type=adjacent. That is only when two docs with the same field value appear next to each other. I'm more concerned with the case where we only want a group of a certain type (no matter where the subsequent docs may be), leaving the rest of the documents ungrouped.
The current grouping functionality using group.field is basically all-or-nothing: all documents will be grouped by the field value or none will. So there would be no way to, for example, collapse just the videos or images like they do in google. You're correct it would be difficult to support this in a sharded environment, but like most other features, it could be available in a single shard first and work toward supporting it in a sharded env. -- View this message in context: http://lucene.472066.n3.nabble.com/Selective-Result-Grouping-tp3391538p3429618.html Sent from the Solr - User mailing list archive at Nabble.com.
