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Posted to issues@spark.apache.org by "Lantao Jin (Jira)" <ji...@apache.org> on 2020/06/29 14:16:00 UTC
[jira] [Updated] (SPARK-32129) Support AQE skew join with Union
[ https://issues.apache.org/jira/browse/SPARK-32129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lantao Jin updated SPARK-32129:
-------------------------------
Description:
Current, the AQE skew join only supports two tables join such as
{code}
SMJ
:-Sort
: +-Shuffle
+-Sort
+-Shuffle
{code}
But if the plan contains a Union, the skew join handling not work:
{code}
Union
:-SMJ
: :-Sort
: : +-Shuffle
: +-Sort
: +-Shuffle
+-SMJ
: :-Sort
: : +-Shuffle
: +-Sort
+-Shuffle
{code}
was:
Current, the AQE skew join only supports two tables join such as
{code}
SMJ
:-Sort
: +-Shuffle
+-Sort
+-Shuffle
{code}
But if the plan contains a Union, the skew join handling not work:
{code}
Union
:-SMJ
: :-Sort
: : +-Shuffle
: +-Sort
: +-Shuffle
+-SMJ
: :-Sort
: : +-Shuffle
: +-Sort
+-Shuffle
{code}
> Support AQE skew join with Union
> --------------------------------
>
> Key: SPARK-32129
> URL: https://issues.apache.org/jira/browse/SPARK-32129
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0, 3.1.0
> Reporter: Lantao Jin
> Priority: Major
>
> Current, the AQE skew join only supports two tables join such as
> {code}
> SMJ
> :-Sort
> : +-Shuffle
> +-Sort
> +-Shuffle
> {code}
> But if the plan contains a Union, the skew join handling not work:
> {code}
> Union
> :-SMJ
> : :-Sort
> : : +-Shuffle
> : +-Sort
> : +-Shuffle
> +-SMJ
> : :-Sort
> : : +-Shuffle
> : +-Sort
> +-Shuffle
> {code}
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