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https://issues.apache.org/jira/browse/HIVE-13795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15634542#comment-15634542
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Eugene Koifman edited comment on HIVE-13795 at 10/16/17 10:01 PM:
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HIVE-14943 adds logic lock acquisition code path to know if it's part of DP
write and the delete SQL stmt is removed from addDynamicParitions()
was (Author: ekoifman):
HIVE-14943 add logic lock acquisition code path to know if it's part of DB
write and the delete SQL stmt is removed from addDynamicParitions()
> TxnHandler should know if operation is using dynamic partitions
> ---------------------------------------------------------------
>
> Key: HIVE-13795
> URL: https://issues.apache.org/jira/browse/HIVE-13795
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Affects Versions: 1.3.0, 2.1.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Critical
>
> TxnHandler.checkLock() see more comments around
> "isPartOfDynamicPartitionInsert". If TxnHandler knew whether it is being
> called as part of an op running with dynamic partitions, it could be more
> efficient. In that case we don't have to write to TXN_COMPONENTS at all
> during lock acquisition. Conversely, if not running with DynPart then, we can
> kill current txn on lock grant rather than wait until commit time.
> if addDynamicPartitions() also knew about DynPart it could eliminate the
> Delete from Txn_components... statement
> This is an important perf optimization when it allows us to detect that
> concurrent txns will have a WW conflict early
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