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László Pintér updated HIVE-23107: --------------------------------- Attachment: HIVE-23107.12.patch > Remove MIN_HISTORY_LEVEL table > ------------------------------ > > Key: HIVE-23107 > URL: https://issues.apache.org/jira/browse/HIVE-23107 > Project: Hive > Issue Type: Improvement > Components: Hive > Reporter: László Pintér > Assignee: László Pintér > Priority: Major > Attachments: HIVE-23107.01.patch, HIVE-23107.02.patch, > HIVE-23107.03.patch, HIVE-23107.04.patch, HIVE-23107.05.patch, > HIVE-23107.06.patch, HIVE-23107.07.patch, HIVE-23107.08.patch, > HIVE-23107.09.patch, HIVE-23107.10.patch, HIVE-23107.11.patch, > HIVE-23107.12.patch > > > MIN_HISTORY_LEVEL table is used in two places: > * Cleaner uses it to decide if the files can be removed - this could be > replaced by adding a new column to compaction_queue storing the next_txn_id > when the change was committed, and before cleaning checking the minimum open > transaction id in the TXNS table > * Initiator uses it to decide if some items from TXN_TO_WRITE_ID table can > be removed. This could be replaced by using the WRITE_SET.WS_COMMIT_ID. -- This message was sent by Atlassian Jira (v8.3.4#803005)