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https://issues.apache.org/jira/browse/PIG-385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12641696#action_12641696
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David Ciemiewicz commented on PIG-385:
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I definitely have use for null or NULL as a constant. It's especially
important for binconditionals like in the example. Any way to get this
prioritized sooner rather than later? It use this all the time in my Pig 1.4
scripts only I use '' (empty string) as the proxy today.
> Should support 'null' as a constant
> -----------------------------------
>
> Key: PIG-385
> URL: https://issues.apache.org/jira/browse/PIG-385
> Project: Pig
> Issue Type: New Feature
> Components: impl
> Affects Versions: types_branch
> Reporter: Alan Gates
> Priority: Minor
> Fix For: types_branch
>
>
> It would be nice to be able to do things like:
> B = foreach A generate $0 > 0 ? $0 : null;
> but right now null is not allowed as a constant. This null constant should
> be allowed anywhere an expression would be, and should be castable (that is
> (int)null).
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