[jira] [Work started] (DRILL-360) Enhance HashFunctions to handle null values

["Jason Altekruse (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-360?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on DRILL-360 started by Jason Altekruse.

> Enhance HashFunctions to handle null values
> -------------------------------------------
>
>                 Key: DRILL-360
>                 URL: https://issues.apache.org/jira/browse/DRILL-360
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Aman Sinha
>            Assignee: Jason Altekruse
>
> Currently, the HashFunctions class uses the NullHandling semantics of NULL_IF_NULL which means it will produce null value for a null input.  In order for Drill operators that perform hashing to work correctly with null inputs, we need to add appropriate handling in the HashFunctions such that they produce integer values (e.g 0) for such inputs.  



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