[
https://issues.apache.org/jira/browse/SPARK-35630?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Apache Spark reassigned SPARK-35630:
------------------------------------
Assignee: Apache Spark
> ExpandExec should not introduce unnecessary exchanges
> -----------------------------------------------------
>
> Key: SPARK-35630
> URL: https://issues.apache.org/jira/browse/SPARK-35630
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.2.0
> Reporter: Tanel Kiis
> Assignee: Apache Spark
> Priority: Major
>
> The Expand is commonly introduced by the RewriteDistinctAggregates optimizer
> rule.
> In that case there can be several attributes that are kept as they are by the
> Expand.
> If the child's output is partitioned by those attributes, then so will be the
> output of the Expand.
> In general case the Expand can output data with arbitrary partitioning, so
> set it as UNKNOWN partitioning.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
