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https://issues.apache.org/jira/browse/HIVE-5329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jason Dere updated HIVE-5329:
-----------------------------

    Attachment: HIVE-5329.2.patch

Attaching patch v2.
- Changes per Ashutosh's comments. I actually ended up adding VOID_GROUP as 
part of PrimitiveGrouping, rather than relying on UNKNOWN_GROUP.
- partition_date.q had a test failure with patch v1.  Looking at the cause, 
this test case apparently never worked properly - casting a date partition 
column to timestamp. I've removed that cast from the test.
                
> Date and timestamp type converts invalid strings to '1970-01-01'
> ----------------------------------------------------------------
>
>                 Key: HIVE-5329
>                 URL: https://issues.apache.org/jira/browse/HIVE-5329
>             Project: Hive
>          Issue Type: Bug
>          Components: Types
>    Affects Versions: 0.12.0
>            Reporter: Vikram Dixit K
>            Assignee: Jason Dere
>            Priority: Blocker
>         Attachments: HIVE-5329.1.patch, HIVE-5329.2.patch
>
>
> {noformat}
> select
>   cast('abcd' as date),
>   cast('abcd' as timestamp)
> from src limit 1;
> {noformat}
> returns '1970-01-01'

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