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https://issues.apache.org/jira/browse/HIVE-22122?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-22122:
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Labels: pull-request-available (was: )
> TxnHandler.getValidWriteIdsForTable optimization for compacted tables
> ---------------------------------------------------------------------
>
> Key: HIVE-22122
> URL: https://issues.apache.org/jira/browse/HIVE-22122
> Project: Hive
> Issue Type: Bug
> Components: Transactions
> Reporter: Peter Vary
> Priority: Major
> Labels: pull-request-available
>
> When we do not find open writes for the given validTxnList then we either:
> # do not have any writes on the table - we can return writeIdHwm = 0, and no
> invalid/aborted writes;
> # we have only compacted writes on the table - we can return writeIdHwm =
> nextWriteId -1, and no invalid/aborted;
> # we have compacted writes and some invalid writes on the table - we can
> return the lowest invalid write as a writeIdHwm and set it as invalid.
> What the current code does instead is sending writeIdHwm = nextWriteId -1,
> and sending every write as invalid. This results the same response in case
> 1-2, but probably a longer list in case 3.
> So we have place for some optimizations
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