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Kallin Nagelberg commented on SOLR-236: --------------------------------------- I tried asking this question on the user list, but perhaps this is a more appropriate forum. As I understand field collapsing has been disabled on multi-valued fields. Is this really necessary? Let's say I have a multi-valued field, 'my-mv-field'. I have a query like (my-mv-field:1 OR my-mv-field:5) that returns docs with the following values for 'my-mv-field': Doc1: 1, 2, 3, Doc2: 1, 3 Doc3: 2, 4, 5, 6 Doc4: 1 If I collapse on that field with that query I imagine it should mean 'collect the docs, starting from the top, so that I find 1 and 5'. In this case if it returned Doc1 and Doc3 I would be happy. There must be some ambiguity or implementation detail I am unaware that is preventing this. It may be a critical piece of functionality for an application I'm working on, so I'm curious if there is point in pursuing development of this functionality or if I am missing something. Thanks, Kallin Nagelberg > Field collapsing > ---------------- > > Key: SOLR-236 > URL: https://issues.apache.org/jira/browse/SOLR-236 > Project: Solr > Issue Type: New Feature > Components: search > Affects Versions: 1.3 > Reporter: Emmanuel Keller > Assignee: Shalin Shekhar Mangar > Fix For: 1.5 > > Attachments: collapsing-patch-to-1.3.0-dieter.patch, > collapsing-patch-to-1.3.0-ivan.patch, collapsing-patch-to-1.3.0-ivan_2.patch, > collapsing-patch-to-1.3.0-ivan_3.patch, DocSetScoreCollector.java, > field-collapse-3.patch, field-collapse-4-with-solrj.patch, > field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, > field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, > field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, > field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, > field-collapse-5.patch, field-collapse-5.patch, field-collapse-5.patch, > field-collapse-solr-236-2.patch, field-collapse-solr-236.patch, > field-collapsing-extended-592129.patch, field_collapsing_1.1.0.patch, > field_collapsing_1.3.patch, field_collapsing_dsteigerwald.diff, > field_collapsing_dsteigerwald.diff, field_collapsing_dsteigerwald.diff, > NonAdjacentDocumentCollapser.java, NonAdjacentDocumentCollapserTest.java, > quasidistributed.additional.patch, SOLR-236-FieldCollapsing.patch, > SOLR-236-FieldCollapsing.patch, SOLR-236-FieldCollapsing.patch, > SOLR-236-trunk.patch, SOLR-236-trunk.patch, SOLR-236-trunk.patch, > SOLR-236-trunk.patch, SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, > SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, SOLR-236.patch, > solr-236.patch, SOLR-236_collapsing.patch, SOLR-236_collapsing.patch > > > This patch include a new feature called "Field collapsing". > "Used in order to collapse a group of results with similar value for a given > field to a single entry in the result set. Site collapsing is a special case > of this, where all results for a given web site is collapsed into one or two > entries in the result set, typically with an associated "more documents from > this site" link. See also Duplicate detection." > http://www.fastsearch.com/glossary.aspx?m=48&amid=299 > The implementation add 3 new query parameters (SolrParams): > "collapse.field" to choose the field used to group results > "collapse.type" normal (default value) or adjacent > "collapse.max" to select how many continuous results are allowed before > collapsing > TODO (in progress): > - More documentation (on source code) > - Test cases > Two patches: > - "field_collapsing.patch" for current development version > - "field_collapsing_1.1.0.patch" for Solr-1.1.0 > P.S.: Feedback and misspelling correction are welcome ;-) -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online. --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org