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From "Ashish Thusoo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-3601) Hive as a contrib project
Date Thu, 04 Sep 2008 21:21:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-3601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628462#action_12628462
] 

Ashish Thusoo commented on HADOOP-3601:
---------------------------------------

I just filed a JIRA for this

https://issues.apache.org/jira/browse/HADOOP-4072

This needs changes to the root build.xml which we had not submitted as part of the patch.

Also there were a bunch of findbugs warnings that we got from antlr generated code when we
last ran it. We want to be able to suppress those and cleanup some others before we turn this
on.




> 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: ant.log, 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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