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https://issues.apache.org/jira/browse/HIVE-15986?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vineet Garg updated HIVE-15986:
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Attachment: HIVE-15986.5.patch
{{HIVE-15986.5.patch}} rewrites {{is distinct from}} into {{ not <=> }} instead
of introducing new tokens and UDFs. Thanks to [~pxiong] for providing grammar
patch.
> Support "is [not] distinct from"
> --------------------------------
>
> Key: HIVE-15986
> URL: https://issues.apache.org/jira/browse/HIVE-15986
> Project: Hive
> Issue Type: Sub-task
> Components: SQL
> Reporter: Carter Shanklin
> Assignee: Vineet Garg
> Attachments: HIVE-15986.1.patch, HIVE-15986.2.patch,
> HIVE-15986.3.patch, HIVE-15986.4.patch, HIVE-15986.5.patch
>
>
> Support standard "is [not] distinct from" syntax. For example this gives a
> standard way to do a comparison to null safe join: select * from t1 join t2
> on t1.x is not distinct from t2.y. SQL standard reference Section 8.15
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