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https://issues.apache.org/jira/browse/SPARK-33183?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Takeshi Yamamuro updated SPARK-33183:
-------------------------------------
Issue Type: Improvement (was: Bug)
> Bug in optimizer rule EliminateSorts
> ------------------------------------
>
> Key: SPARK-33183
> URL: https://issues.apache.org/jira/browse/SPARK-33183
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.8, 3.0.2, 3.1.0
> Reporter: Allison Wang
> Priority: Major
>
> 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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