Uploaded image for project: 'Lucene - Core'
  1. Lucene - Core
  2. LUCENE-6179

Remove out-of-order scoring

    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 5.0, 6.0
    • None
    • None
    • New

    Description

      Out-of-order currently adds complexity that I would like to remove. Here is a selection of issues that come from out-of-order scoring.

      • lots of specializations with collectors: we have two versions of every top score/field collector depending on whether it should support out-of-order collection or not
      • it feels like it should be an implementation detail of our bulk scorers but it also makes our APIs more complicated, eg. LeafCollector.acceptsDocsOutOfOrder
      • if you create a TopFieldCollector, how do you know if you should pass docsScoredInOrder=true or false? To make the decision, you actually need to know whether your query supports out-of-order scoring while the API is on Weight.

      I initially wanted to keep it and improve the decision process in LUCENE-6172 but I'm not sure it's the right approach as it would require to make the API even more complicated... hence the suggestion to remove out-of-order scoring completely.

      Attachments

        1. bool_or.tasks
          3 kB
          Adrien Grand
        2. LUCENE-6179.patch
          178 kB
          Adrien Grand
        3. LUCENE-6179.patch
          173 kB
          Adrien Grand

        Issue Links

          Activity

            People

              jpountz Adrien Grand
              jpountz Adrien Grand
              Votes:
              1 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: