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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3601) Hive as a contrib project
Date Tue, 02 Sep 2008 22:23:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12627833#action_12627833
] 

dhruba borthakur commented on HADOOP-3601:
------------------------------------------

Hi Owen,  

findbugs is not (yet) switched on for the Hive patch. So, if you run "ant findbugs" from the
top level, it won't run findbugs on src/contrib/hive yet. In short, "ant findbugs" on the
top level won't show any new findbugs warnings!

We plan to switch on findbugs (and also fix findbugs warnings) in a separate follow-on JIRA.
Hope that it ok with you.

> Hive as a contrib project
> -------------------------
>
>                 Key: HADOOP-3601
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3601
>             Project: Hadoop Core
>          Issue Type: Wish
>          Components: contrib/hive
>    Affects Versions: 0.19.0
>         Environment: N/A
>            Reporter: Joydeep Sen Sarma
>            Assignee: Ashish Thusoo
>            Priority: Minor
>             Fix For: 0.19.0
>
>         Attachments: hive.tgz, hive.tgz, hive.tgz, HiveTutorial.pdf
>
>   Original Estimate: 1080h
>  Remaining Estimate: 1080h
>
> Hive is a data warehouse built on top of flat files (stored primarily in HDFS). It includes:
> - Data Organization into Tables with logical and hash partitioning
> - A Metastore to store metadata about Tables/Partitions etc
> - A SQL like query language over object data stored in Tables
> - DDL commands to define and load external data into tables
> Hive's query language is executed using Hadoop map-reduce as the execution engine. Queries
can use either single stage or multi-stage map-reduce. Hive has a native format for tables
- but can handle any data set (for example json/thrift/xml) using an IO library framework.
> Hive uses Antlr for query parsing, Apache JEXL for expression evaluation and may use
Apache Derby as an embedded database for MetaStore. Antlr has a BSD license and should be
compatible with Apache license.
> We are currently thinking of contributing to the 0.17 branch as a contrib project (since
that is the version under which it will get tested internally) - but looking for advice on
the best release path.

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