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From "Shai Erera (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-5178) doc values should expose missing values (or allow configurable defaults)
Date Tue, 03 Sep 2013 07:52:54 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-5178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13756430#comment-13756430
] 

Shai Erera commented on LUCENE-5178:
------------------------------------

I manage to reproduce it only if I set both tests.seed and tests.postingsformat. What I see
is that Lucene42DVProducer is used, which returns MatchAllBits (it supports only SortedSet?),
which leads to the incorrect counts. The initialized Codec is Lucene45Codec, which returns
Lucene42DVF. The test does use defaultCodecSupportsDocsWithField(), but the latter only asserts
that the name of the Codec is not "40", "41", "42", yet it does not check if the DVF supports
it. That seems wrong?
                
> doc values should expose missing values (or allow configurable defaults)
> ------------------------------------------------------------------------
>
>                 Key: LUCENE-5178
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5178
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Yonik Seeley
>             Fix For: 5.0, 4.5
>
>         Attachments: LUCENE-5178.patch, LUCENE-5178_reintegrate.patch
>
>
> DocValues should somehow allow a configurable default per-field.
> Possible implementations include setting it on the field in the document or registration
of an IndexWriter callback.
> If we don't make the default configurable, then another option is to have DocValues fields
keep track of whether a value was indexed for that document or not.

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