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https://issues.apache.org/jira/browse/HIVE-656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Shao resolved HIVE-656.
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Resolution: Fixed
Fix Version/s: 0.4.0
Release Note: HIVE-656. Add a PMOD (POSITIVE MOD) function. (Scott Chen
via zshao)
Hadoop Flags: [Reviewed]
I overwrote the output for show_functions and committed it. Thanks Scott.
> Add a PMOD (POSITIVE_MOD) function
> ----------------------------------
>
> Key: HIVE-656
> URL: https://issues.apache.org/jira/browse/HIVE-656
> Project: Hadoop Hive
> Issue Type: New Feature
> Reporter: Zheng Shao
> Assignee: Scott Chen
> Fix For: 0.4.0
>
> Attachments: hive-656-2009-07-27-1.patch,
> hive-656-2009-07-27-2.patch, hive-656-2009-07-27.patch
>
>
> There are a lot of cases people want to get a positive modulo result.
> For example, people want to bucket the data into 10 buckets. They use the
> hash code in Hive (based on Java) which can return a negative number. Then
> they need this POSITIVE_MOD(a, b) to return the results.
> Otherwise they can still do it but it will be very verbose:
> {code}
> ((hash(xxx) % 10) + 10) % 10
> {code}
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