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  1. Lucene - Core
  2. LUCENE-9017

GroupingSearch does not return all the groups when using SortedSetDocValuesField

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 8.2
    • Fix Version/s: None
    • Component/s: core/search
    • Labels:
      None
    • Lucene Fields:
      New

      Description

      I managed to retrieve the groups using the SortedSetDocValuesField in
      GroupingSearch by initializing the groupsearch with SortedSetFieldSource

      The problem is when a document has multiple values in the field
      "SortedSetDocValuesField" than not the grouping query does not return all
      the groups.

      Let me demonstrate it in my example

      // indexing, the first object has the category "one" and the second object
      has category "two" and "three"

      Document doc = new Document();
      doc.add(new FacetField("Author", "Bob"));
      doc.add(new SortedSetDocValuesField("category", new BytesRef("one")));
      indexWriter.addDocument(config.build(taxoWriter, doc));

      doc = new Document();
      doc.add(new FacetField("Author", "Lisa"));
      doc.add(new SortedSetDocValuesField("category", new BytesRef("two")));
      doc.add(new SortedSetDocValuesField("category", new BytesRef("three")));
      indexWriter.addDocument(config.build(taxoWriter, doc));

      // initializing the grouping search
      ValueSource vs = new SortedSetFieldSource(groupField);
      groupingSearch = new GroupingSearch(vs, new HashMap<>());

      // performing the group search
      TopGroups groups = groupingSearch.search(searcher, new MatchAllDocsQuery(),
      0, 100);

      It returns 2 groups only and I would expect 3 groups ("one", "two" and
      "three")

      Is it a bug or am I using the API in a wrong way?

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            • Assignee:
              Unassigned
              Reporter:
              duriku Juraj Kucera
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              Dates

              • Created:
                Updated: