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https://issues.apache.org/jira/browse/LUCENE-5961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14174188#comment-14174188
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ASF subversion and git services commented on LUCENE-5961:
---------------------------------------------------------
Commit 1632432 from hoss...@apache.org in branch 'dev/branches/branch_5x'
[ https://svn.apache.org/r1632432 ]
LUCENE-5961: Fix the exists() method for FunctionValues returned by many
ValueSoures to behave properly when wrapping other ValueSources which do not
exist for the specified document (merge r1632414)
> FunctionValues.exist(int) isn't returning false in cases where it should for
> many "math" based value sources
> ------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-5961
> URL: https://issues.apache.org/jira/browse/LUCENE-5961
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Hoss Man
> Attachments: LUCENE-5961.patch, LUCENE-5961.patch, LUCENE-5961.patch
>
>
> The FunctionValues class contains an exist(int doc) method with a default
> implementation that returns true - field based DocValues override this method
> as appropriate, but most of the "function" based subclasses in the code
> (typically anonymous subclasses of "FloatDocValues") don't override this
> method when wrapping other ValueSources.
> So for example: the FunctionValues returned by
> ProductFloatFunction.getValues() will say that a value exists for any doc,
> even if that ProductFloatFunction wraps two FloatFieldSources that don't
> exist for any docs
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