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https://issues.apache.org/jira/browse/HIVE-12439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-12439:
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Issue Type: Improvement (was: Bug)
> CompactionTxnHandler.markCleaned() and TxnHandler.openTxns() misc improvements
> ------------------------------------------------------------------------------
>
> Key: HIVE-12439
> URL: https://issues.apache.org/jira/browse/HIVE-12439
> Project: Hive
> Issue Type: Improvement
> Components: Metastore, Transactions
> Affects Versions: 1.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
>
> # add distinct to s = "select txn_id from TXNS, TXN_COMPONENTS where txn_id =
> tc_txnid and txn_state = '" +
> TXN_ABORTED + "' and tc_database = '" + info.dbname + "' and
> tc_table = '" +
> # add a safeguard to make sure IN clause is not too large; break up by txn id
> to delete from TXN_COMPONENTS where tc_txnid in ...
> # TxnHandler. openTxns() - use 1 insert with many rows in values() clause,
> rather than 1 DB roundtrip per row
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