Apache Hive 0.12.0发布，数据仓库平台

Apache Hive 0.12.0 发布了，Hive是一个基于Hadoop的数据仓库平台。通过hive，我们可以方便地进行ETL的工作。hive定义了一个类似于SQL的查询语言：HQL，能 够将用户编写的QL转化为相应的Mapreduce程序基于Hadoop执行。

该版本主要新特性包括：

[HIVE-305] - Port Hadoop streaming's counters/status reporters to Hive Transforms
[HIVE-1402] - Add parallel ORDER BY to Hive
[HIVE-2206] - add a new optimizer for query correlation discovery and optimization
[HIVE-2482] - Convenience UDFs for binary data type
[HIVE-2517] - Support group by on struct type
[HIVE-2655] - Ability to define functions in HQL
[HIVE-2670] - A cluster test utility for Hive
[HIVE-3255] - Add DBTokenStore to store Delegation Tokens in DB
[HIVE-4005] - Column truncation
[HIVE-4095] - Add exchange partition in Hive
[HIVE-4123] - The RLE encoding for ORC can be improved
[HIVE-4246] - Implement predicate pushdown for ORC
[HIVE-4531] - [WebHCat] Collecting task logs to hdfs
[HIVE-4614] - Support outer lateral view
[HIVE-4844] - Add varchar data type
[HIVE-4911] - Enable QOP configuration for Hive Server 2 thrift transport
[HIVE-4963] - Support in memory PTF partitions

同时还包含大量的改进和 bug 修复，完整列表请看https://issues.apache.org/jira/secure/ReleaseNote.jspa?version=12324312&styleName=Text&projectId=12310843

来自:开源中国社区