Hadoop-compatible Input

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-Output Format for Hive

This is a proposal for adding API to hive which allows reading and writing with Hive using a Hadoop compatible API. Specifically, the interfaces being implemented are:

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The classes will be named HiveApiInputFormat and HiveApiOutputFormat.

Hive Input

At the high level, to read from hive using this API:

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• The HiveInputDescription describes the database, table and columns to select. It also has a partition filter property that can be used to read from only the partitions that match the filter statement.
• HiveApiInputFormat supports reading from multiple tables by having a concept of profiles. Each profile stores its input description in a separate section, and the HiveApiInputFormat has a member which tells it which profile to read from. When initializing the input data in HiveApiInputFormat you can pair it with a profile. If no profile is selected then a default profile is used.

Hive Output

TODO