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https://issues.apache.org/jira/browse/SPARK-38162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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XiDuo You updated SPARK-38162:
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Description:
Optimize the plan if its max row is equal to or less than 1 in these cases:
- if the child of sort max rows less than or equal to 1, remove the sort
- if the child of local sort max rows per partition less than or equal to 1,
remove the local sort
- if the child of aggregate max rows less than or equal to 1 and it's grouping
only (include the rewritten distinct plan), remove the aggregate
- if the child of aggregate max rows less than or equal to 1, set distinct to
false in all aggregate expression
was:
Optimize the plan if its max row is equal to or less than 1 in these cases:
* if sort max rows less than or equal to 1, remove the sort
* if local sort max rows per partition less than or equal to 1, remove the
local sort
* if aggregate max rows less than or equal to 1 and it's grouping only, remove
the aggregate
* if aggregate max rows less than or equal to 1, set distinct to false in all
aggregate expression
> Optimize one row plan in normal and AQE Optimizer
> -------------------------------------------------
>
> Key: SPARK-38162
> URL: https://issues.apache.org/jira/browse/SPARK-38162
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: XiDuo You
> Priority: Major
>
> Optimize the plan if its max row is equal to or less than 1 in these cases:
> - if the child of sort max rows less than or equal to 1, remove the sort
> - if the child of local sort max rows per partition less than or equal to 1,
> remove the local sort
> - if the child of aggregate max rows less than or equal to 1 and it's
> grouping only (include the rewritten distinct plan), remove the aggregate
> - if the child of aggregate max rows less than or equal to 1, set distinct to
> false in all aggregate expression
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