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https://issues.apache.org/jira/browse/PIG-3473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aniket Mokashi updated PIG-3473:
--------------------------------
Description:
Currently Expression only support BinaryExpressions and Constants. Most of the
other logical expressions (cast, udf) need not be pushed down. But, it would
make sense to be able to pushdown is null and not operations (possibly
negativeexpression).
This change would have impact on LoadFunc's (hcatloader), we need to be careful
and make sure we do this in a backwards compatible way.
> org.apache.pig.Expression should support "is null" and "not" operations
> -----------------------------------------------------------------------
>
> Key: PIG-3473
> URL: https://issues.apache.org/jira/browse/PIG-3473
> Project: Pig
> Issue Type: Improvement
> Components: impl
> Affects Versions: 0.11.1
> Reporter: Aniket Mokashi
> Fix For: 0.12.1
>
>
> Currently Expression only support BinaryExpressions and Constants. Most of
> the other logical expressions (cast, udf) need not be pushed down. But, it
> would make sense to be able to pushdown is null and not operations (possibly
> negativeexpression).
> This change would have impact on LoadFunc's (hcatloader), we need to be
> careful and make sure we do this in a backwards compatible way.
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