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From "Michael McCandless (JIRA)" <>
Subject [jira] [Resolved] (LUCENE-7899) Rename FieldValueQuery to DocValuesFieldExistsQuery
Date Wed, 05 Jul 2017 15:03:00 GMT


Michael McCandless resolved LUCENE-7899.
       Resolution: Fixed
    Fix Version/s: master (8.0)

> Rename FieldValueQuery to DocValuesFieldExistsQuery
> ---------------------------------------------------
>                 Key: LUCENE-7899
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>            Priority: Blocker
>             Fix For: 7.0, master (8.0)
>         Attachments: LUCENE-7899.patch
> I don't think we have a query today to efficiently test whether a doc values field exists
(has any value) for each document in the index?
> Now that we use iterators to access doc values, this should be an efficient query: we
can return the DISI we get for the doc values.
> ElasticSearch indexes its own field to record which field names occur in a document,
so it's able to do "exists" for any field (not just doc values fields), but I think doc values
fields we can just get "for free".
> I haven't started on this ... just wanted to open the issue first for discussion.

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