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From "Alexander Pivovarov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-11103) Add banker's rounding BROUND UDF
Date Mon, 10 Aug 2015 07:20:46 GMT

     [ https://issues.apache.org/jira/browse/HIVE-11103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexander Pivovarov updated HIVE-11103:
---------------------------------------
    Attachment: HIVE-11103.4.patch

patch #4:
- added BRoubs udf to Vectorizer 
- added non-default constructor to BRoundWithNumDigitsDoubleToDouble and FuncRoundWithNumDigitsDecimalToDecimal
- added BRound to TestVectorizationContext
- fixed vector_bround.q.out


> Add banker's rounding BROUND UDF
> --------------------------------
>
>                 Key: HIVE-11103
>                 URL: https://issues.apache.org/jira/browse/HIVE-11103
>             Project: Hive
>          Issue Type: New Feature
>          Components: UDF
>            Reporter: Alexander Pivovarov
>            Assignee: Alexander Pivovarov
>         Attachments: HIVE-11103.1.patch, HIVE-11103.1.patch, HIVE-11103.2.patch, HIVE-11103.4.patch
>
>
> Banker's rounding: the value is rounded to the nearest even number. Also known as "Gaussian
rounding", and, in German, "mathematische Rundung".
> Example
> {code}
>                   2 digits                2 digits
> Unrounded    "Standard" rounding    "Gaussian" rounding
>   54.1754      54.18                  54.18
>  343.2050     343.21                 343.20
> +106.2038    +106.20                +106.20 
> =========    =======                =======
>  503.5842     503.59                 503.58
> {code}



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