Owen O'Malley created HIVE-5317:
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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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