Hi Martijn, Thanks for your insight of collapsedDocs, and what I need to modify if I need the functionality I want.
Michael Martijn v Groningen wrote: > > Hi Micheal, > > What you are saying seems logical, but that is currently not the case > with the collapsedDocs functionality. This functionality was build > with computing aggregated statistics in mind and not really to have a > separate collapse group search result. Although the collapsed > documents are collected in the order the appear in the search result > (only if collapsetype is adjacent) they are not saved in the order > they appear. > > If you really need to have the collapse group search result in the > order they were collapsed you need to tweak the code. What you can do > is change the CollapsedDocumentCollapseCollector class in the > DocumentFieldsCollapseCollectorFactory.java source file. Currently the > document ids are stored inside a OpenBitSet per collapse group. You > can change that into an ArrayList<Integer> for example. In this way > the order in where the documents were collapsed is preserved. > > I think the downside of this change will be to increase of memory > usage. OpenBitSet is memory wise more efficient then an ArrayList of > integers. I think that this will only be a real problem when the > collapse groups become very large. > > I hope this will answer your question. > > Martijn > > 2009/11/14 michael8 <mich...@saracatech.com>: >> >> Hi, >> >> This almost seems like a bug, but I can't be sure so I'm seeking >> confirmation. Basically I am building a site that presents search >> results >> in reverse chronologically order. I am also leveraging the field >> collapse >> feature so that I can group results using 'adjacent' mode and have solr >> return the collapsed results as well via 'includeCollapsedDocs'. My >> collapsing field is a custom grouping_id that I have specified. >> >> What I'm noticing is that, my search results are coming back in the >> correct >> order by descending time (via 'sort' param in the main query) as >> expected. >> However, the results returned within the 'collapsedDocs' section via >> 'includeCollapsedDocs' are not in the same descending time order. >> >> My question is, shouldn't the collapsedDocs results also be in the same >> 'sort' order and key I have specified in the overall query, particularly >> since 'adjacent' mode is enabled, and that would mean results that are >> 'adjacent' in the sort order of the results. >> >> I'm using Solr 1.4.0 + field collapse patch as of 10/27/2009 >> >> Thanks, >> Michael >> >> -- >> View this message in context: >> http://old.nabble.com/field-collapse-using-%27adjacent%27---%27includeCollapsedDocs%27-%2B-%27sort%27-query-field-tp26351840p26351840.html >> Sent from the Solr - User mailing list archive at Nabble.com. >> >> > > -- View this message in context: http://old.nabble.com/field-collapse-%27includeCollapsedDocs%27-doesn%27t-return-results-within-%27collapsedDocs%27-in-%27sort%27-order-specified-tp26351840p26360433.html Sent from the Solr - User mailing list archive at Nabble.com.
