[jira] [Updated] (PIG-1930) comparison operation 'null == null' should evaluate to null

["Olga Natkovich (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PIG-1930?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Olga Natkovich updated PIG-1930:
--------------------------------

    Fix Version/s:     (was: 0.9.0)

> comparison operation 'null == null'  should evaluate to null
> ------------------------------------------------------------
>
>                 Key: PIG-1930
>                 URL: https://issues.apache.org/jira/browse/PIG-1930
>             Project: Pig
>          Issue Type: Bug
>    Affects Versions: 0.8.0, 0.9.0
>            Reporter: Thejas M Nair
>             Fix For: 0.10
>
>
> The expression  'null == null' evaluates to true, it should get evaluated as null.
> ie the filter condition 'fil = filter inp by null == null;' allows all the records through.
> It seems to be a problem only with null literal, expressions that evaluate to null don't seem to have a problem.
> ie 'nullcol1 == nullcol2' (where nullcol1, nullcol2 are columns with null value), and (1 + null == 1 + null) work correctly .

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