Lucene - Core
  1. Lucene - Core
  2. LUCENE-3390

Incorrect sort by Numeric values for documents missing the sorting field

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    • Lucene Fields:
      Patch Available

      Description

      While sorting results over a numeric field, documents which do not contain a value for the sorting field seem to get 0 (ZERO) value in the sort. (Tested against Double, Float, Int & Long numeric fields ascending and descending order).
      This behavior is unexpected, as zero is "comparable" to the rest of the values. A better solution would either be allowing the user to define such a "non-value" default, or always bring those document results as the last ones.

      Example scenario:
      Adding 3 documents, 1st with value 3.5d, 2nd with -10d, and 3rd without any value.
      Searching with MatchAllDocsQuery, with sort over that field in descending order yields the docid results of 0, 2, 1.

      Asking for the top 2 documents brings the document without any value as the 2nd result - which seems as a bug?

      1. SortByDouble.java
        2 kB
        Gilad Barkai
      2. LUCENE-3390.patch
        23 kB
        Doron Cohen
      3. LUCENE-3390-fix-like-trunk.patch
        13 kB
        Uwe Schindler
      4. LUCENE-3390-fix-like-trunk.patch
        19 kB
        Uwe Schindler
      5. LUCENE-3390-fix-like-trunk.patch
        19 kB
        Uwe Schindler
      6. LUCENE-3390-fix-like-trunk.patch
        22 kB
        Uwe Schindler
      7. LUCENE-3390-BitsInterface.patch
        24 kB
        Uwe Schindler
      8. LUCENE-3390-BitsInterface.patch
        26 kB
        Doron Cohen
      9. LUCENE-3390-BitsInterface.patch
        29 kB
        Uwe Schindler
      10. LUCENE-3390-inverted.patch
        12 kB
        Uwe Schindler

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            • Assignee:
              Uwe Schindler
              Reporter:
              Gilad Barkai
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              • Created:
                Updated:
                Resolved:

                Development