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https://issues.apache.org/jira/browse/HIVE-16505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Laszlo Bodor reassigned HIVE-16505:
-----------------------------------
Assignee: Laszlo Bodor
> Support "unknown" boolean truth value
> -------------------------------------
>
> Key: HIVE-16505
> URL: https://issues.apache.org/jira/browse/HIVE-16505
> Project: Hive
> Issue Type: Sub-task
> Components: SQL
> Reporter: Zoltan Haindrich
> Assignee: Laszlo Bodor
> Priority: Major
>
> according to the standard, boolean truth value might be:
> {{TRUE|FALSE|UNKNOWN}}.
> similar queries to the following should be supported:
> {code}
> select 1 where null is unknown;
> select 1 where (select cast(null as boolean) ) is unknown;
> {code}
> "unknown" behaves similarily to null. {{(null=null) is null}}
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