László Pintér created HIVE-23107:
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Summary: 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
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.
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