[
https://issues.apache.org/jira/browse/SPARK-59492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
XiDuo You reassigned SPARK-59492:
---------------------------------
Assignee: XiDuo You
> Remove partial window group limit below a GroupPartitionsExec
> -------------------------------------------------------------
>
> Key: SPARK-59492
> URL: https://issues.apache.org/jira/browse/SPARK-59492
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 4.4.0
> Reporter: XiDuo You
> Assignee: XiDuo You
> Priority: Major
> Labels: pull-request-available
>
> RemoveRedundantWindowGroupLimits only reaches a partial WindowGroupLimitExec
> that sits directly below the final one. When EnsureRequirements puts a local
> sort between the final node and a GroupPartitionsExec -- the sort that gives
> the final node its ordering -- the partial node below the grouping is kept
> although removing it cannot change the result.
> Look through that local sort, and remove the local sort that fed the partial
> node with it: a sort between the two nodes already orders the rows the final
> node ranks as a whole, which makes the one below dead.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
