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https://issues.apache.org/jira/browse/SPARK-33183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17233058#comment-17233058
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Dongjoon Hyun edited comment on SPARK-33183 at 11/16/20, 8:23 PM:
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I added SPARK-23973 as "is caused by". If then, Apache Spark 2.3 seems to be
okay. Please let me know if this affects older Sparks.
was (Author: dongjoon):
I added SPARK-23973 as "is caused by". If then, Apache Spark 2.3 seems to be
okay.
> Bug in optimizer rule EliminateSorts
> ------------------------------------
>
> Key: SPARK-33183
> URL: https://issues.apache.org/jira/browse/SPARK-33183
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0, 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.4.6, 2.4.7,
> 2.4.8, 3.0.2, 3.1.0
> Reporter: Allison Wang
> Assignee: Allison Wang
> Priority: Major
> Labels: correctness
> Fix For: 2.4.8, 3.0.2, 3.1.0
>
>
> Currently, the rule {{EliminateSorts}} removes a global sort node if its
> child plan already satisfies the required sort order without checking if the
> child plan's ordering is local or global. For example, in the following
> scenario, the first sort shouldn't be removed because it has a stronger
> guarantee than the second sort even if the sort orders are the same for both
> sorts.
> {code:java}
> Sort(orders, global = True, ...)
> Sort(orders, global = False, ...){code}
>
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