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https://issues.apache.org/jira/browse/HIVE-13795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15941906#comment-15941906
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Pengcheng Xiong commented on HIVE-13795:
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I am deferring this to Hive 3.0 as we are going to cut the first RC and it is
not marked as blocker.
> 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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