Hive as a contrib project
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Key: HADOOP-3601
URL: https://issues.apache.org/jira/browse/HADOOP-3601
Project: Hadoop Core
Issue Type: New Feature
Affects Versions: 0.17.0
Reporter: Joydeep Sen Sarma
Priority: Minor
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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