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Posted to dev@hive.apache.org by "David Worms (JIRA)" <ji...@apache.org> on 2013/02/20 11:17:13 UTC
[jira] [Commented] (HIVE-2843) UDAF to convert an aggregation to a
map
[ https://issues.apache.org/jira/browse/HIVE-2843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13582066#comment-13582066 ]
David Worms commented on HIVE-2843:
-----------------------------------
I just created the requested phabricator entry: https://reviews.facebook.net/T45.
I did my best, arc wasnt working for me, a message like "libphutil v1 libraries are no longer supported", I tried a workaround illustrated on the mailing list (http://mail-archives.apache.org/mod_mbox/hive-dev/201301.mbox/%3CFF1DF58D04F11D4291D09795D1A4EF1618657D12DB@SRV-MAIL%3E) but also without success. I ended up creating the patch and uploading it manually.
> UDAF to convert an aggregation to a map
> ---------------------------------------
>
> Key: HIVE-2843
> URL: https://issues.apache.org/jira/browse/HIVE-2843
> Project: Hive
> Issue Type: New Feature
> Components: UDF
> Affects Versions: 0.9.0, 0.10.0
> Reporter: David Worms
> Priority: Minor
> Labels: features, udf
> Attachments: HIVE-2843.1.patch.txt
>
>
> I propose the addition of two new Hive UDAF to help with maps in Apache Hive. The source code is available on GitHub at https://github.com/wdavidw/hive-udf in two Java classes: "UDAFToMap" and "UDAFToOrderedMap". The first function convert an aggregation into a map and is internally using a Java `HashMap`. The second function extends the first one. It convert an aggregation into an ordered map and is internally using a Java `TreeMap`. They both extends the `AbstractGenericUDAFResolver` class.
> Also, I have covered the motivations and usages of those UDAF in a blog post at http://adaltas.com/blog/2012/03/06/hive-udaf-map-conversion/
> The full patch is available with tests as well.
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