[jira] [Updated] (LUCENE-5961) FunctionValues.exist(int) isn't returning false in cases where it should for many "math" based value sources

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5961?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-5961:
--------------------------------
    Fix Version/s: 4.10.3

> 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
>            Assignee: Hoss Man
>             Fix For: 4.10.3, 5.0, Trunk
>
>         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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