Eugene Koifman created HIVE-20823:
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Summary: Make Compactor run in a transaction
Key: HIVE-20823
URL: https://issues.apache.org/jira/browse/HIVE-20823
Project: Hive
Issue Type: Improvement
Components: Transactions
Affects Versions: 3.0.0
Reporter: Eugene Koifman
Assignee: Eugene Koifman
Have compactor open a transaction and run the job in that transaction.
# make compactor produced base/delta include this txn id in the folder name,
e.g. base_7_c17 where 17 is the txnid.
# add {{CQ_TXN_ID bigint}} to COMPACTION_QUEUE and COMPLETED_COMPACTIONS to
record this txn id
# make sure {{AcidUtils.getAcidState()}} pays attention to this transaction on
read and ignores this dir if this txn id is not committed in the current
snapshot
## this means not only validWriteIdList but ValidTxnIdList should be passed
along in config (if it isn't yet)
# once this is done, {{CompactorMR.createCompactorMarker()}} can be eliminated
and {{AcidUtils.isValidBase}} modified accordingly
# modify Cleaner so that it doesn't clean old files until new file is visible
to all readers
#
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