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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-7899) Rename FieldValueQuery to DocValuesFieldExistsQuery
Date Wed, 05 Jul 2017 17:55:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-7899?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16075150#comment-16075150
] 

ASF subversion and git services commented on LUCENE-7899:
---------------------------------------------------------

Commit f288b440b76f6b2ab23cc134054e2b1d374d182a in lucene-solr's branch refs/heads/branch_7_0
from Mike McCandless
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=f288b44 ]

LUCENE-7899: add text after header in MIGRATE.txt


> Rename FieldValueQuery to DocValuesFieldExistsQuery
> ---------------------------------------------------
>
>                 Key: LUCENE-7899
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7899
>             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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