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From "Adam Szita (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-22099) Several date related UDFs can't handle Julian dates properly since HIVE-20007
Date Fri, 16 Aug 2019 14:00:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-22099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Adam Szita updated HIVE-22099:
------------------------------
    Attachment: HIVE-22099.4.patch

> Several date related UDFs can't handle Julian dates properly since HIVE-20007
> -----------------------------------------------------------------------------
>
>                 Key: HIVE-22099
>                 URL: https://issues.apache.org/jira/browse/HIVE-22099
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Adam Szita
>            Assignee: Adam Szita
>            Priority: Major
>         Attachments: HIVE-22099.0.patch, HIVE-22099.1.patch, HIVE-22099.2.patch, HIVE-22099.3.patch,
HIVE-22099.4.patch
>
>
> Currently dates that belong to Julian calendar (before Oct 15, 1582) are handled improperly
by date/timestamp UDFs.
> E.g. DateFormat UDF:
> Although the dates are in Julian calendar, the formatter insists to print these according
to Gregorian calendar causing multiple days of difference in some cases:
>  
> {code:java}
> beeline> select date_format('1001-01-05','dd---MM--yyyy');
> +----------------+
> | _c0 |
> +----------------+
> | 30---12--1000 |
> +----------------+{code}
>  I've observed similar problems in the following UDFs:
>  * add_months
>  * date_format
>  * day
>  * month
>  * months_between
>  * weekofyear
>  * year
>  



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