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https://issues.apache.org/jira/browse/HIVE-13795?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman updated HIVE-13795:
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Description:
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
was:
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
> 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
> 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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