[HIVE-5317] Implement insert, update, and delete in Hive with full ACID support

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.14.0
• Component/s: Transactions
• Assignee: Owen O'Malley
• Reporter: Owen O'Malley
• Created: 19/Sep/13 04:57
• Updated: 01/Oct/19 22:06
• Resolved: 25/Sep/14 16:18

Description

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.

Issue Links

• incorporates: HIVE-5687 Streaming support in Hive
• is duplicated by: HIVE-4402 Support UPDATE statement
• is related to: HIVE-8244 INSERT/UPDATE/DELETE should return count of rows affected
• is related to: HIVE-6905 Implement Auto increment, primary-foreign Key, not null constraints and default value in Hive Table columns
• is related to: HIVE-9675 Support START TRANSACTION/COMMIT/ROLLBACK commands
• relates to: HIVE-10924 add support for MERGE statement
• supercedes: HIVE-4196 Support for Streaming Partitions in Hive

Sub-Tasks

• Define API for RecordUpdater and UpdateReader: Resolved
• Transaction manager for Hive: Resolved
• Insert, update, delete functionality needs a compactor: Resolved
• Need new "show" functionality for transactions: Resolved
• Need to write documentation for ACID work: Resolved
• Streaming support in Hive: Resolved
• Fix vectorized input to work with ACID: Resolved
• Disable CombineInputFormat for InputFormats that don't use FileSplit: Resolved
• Fix OrcRecordUpdater to use sync instead of flush: Resolved
• Fix reading partial ORC files while they are being written: Resolved
• Need file sink operators that work with ACID: Closed
• RecordUpdater should extend RecordWriter: Resolved
• Add ROW__ID VirtualColumn: Closed
• RecordUpdater should read virtual columns from row: Closed
• Modify parser to support new grammar for Insert,Update,Delete: Closed
• OrcRecordUpdater needs to implement getStats: Closed
• Generate plans for insert, update, and delete: Closed
• Update privileges to check for update and delete: Closed
• Update language manual for insert, update, and delete: Resolved
• Compactions need to update table/partition stats: Resolved