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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-5317) Implement insert, update, and delete in Hive with full ACID support
Date Thu, 19 Sep 2013 04:58:51 GMT
Owen O'Malley created HIVE-5317:
-----------------------------------

             Summary: Implement insert, update, and delete in Hive with full ACID support
                 Key: HIVE-5317
                 URL: https://issues.apache.org/jira/browse/HIVE-5317
             Project: Hive
          Issue Type: New Feature
            Reporter: Owen O'Malley
            Assignee: Owen O'Malley


Many customers want to be able to insert, update and delete rows from Hive tables with full
ACID support. The use cases are varied, but the form of the queries that should be supported
are:

* INSERT INTO tbl SELECT …
* INSERT INTO tbl VALUES ...
* UPDATE tbl SET … WHERE …
* DELETE FROM tbl WHERE …
* MERGE INTO tbl USING src ON … WHEN MATCHED THEN ... WHEN NOT MATCHED THEN ...
* SET TRANSACTION LEVEL …
* BEGIN/END TRANSACTION

Use Cases

* Once an hour, a set of inserts and updates (up to 500k rows) for various dimension tables
(eg. customer, inventory, stores) needs to be processed. The dimension tables have primary
keys and are typically bucketed and sorted on those keys.
* Once a day a small set (up to 100k rows) of records need to be deleted for regulatory compliance.
* Once an hour a log of transactions is exported from a RDBS and the fact tables need to be
updated (up to 1m rows)  to reflect the new data. The transactions are a combination of inserts,
updates, and deletes. The table is partitioned and bucketed.


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