[
https://issues.apache.org/jira/browse/SPARK-35355?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
yikf updated SPARK-35355:
-------------------------
Description:
In the case of `insert into...select...limit` , `CollectLimitExec` has better
execution performance than `GlobalLimit` .
Before:
{code:java}
== Physical Plan ==
Execute InsertIntoHadoopFsRelationCommand ...
+- *(2) GlobalLimit 5
+- Exchange SinglePartition, true, id=#39
+- *(1) LocalLimit 5
+- *(1) ColumnarToRow
+- FileScan ...
{code}
After:
{code:java}
== Physical Plan ==
Execute InsertIntoHadoopFsRelationCommand ...
+- CollectLimit 5
+- *(1) ColumnarToRow
+- FileScan ....
{code}
was:
In the case of `insert into...select...limit` , `CollectLimitExec` has better
execution performance than `GlobalLimit` .
Before:
```
== Physical Plan ==
Execute InsertIntoHadoopFsRelationCommand ...
+- *(2) GlobalLimit 5
+- Exchange SinglePartition, true, [id=#39]
+- *(1) LocalLimit 5
+- *(1) ColumnarToRow
+- FileScan ...
```
After:
```
== Physical Plan ==
Execute InsertIntoHadoopFsRelationCommand ...
+- CollectLimit 5
+- *(1) ColumnarToRow
+- FileScan ....
```
> improve execution performance in insert...select...limit case
> --------------------------------------------------------------
>
> Key: SPARK-35355
> URL: https://issues.apache.org/jira/browse/SPARK-35355
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: yikf
> Priority: Minor
> Fix For: 3.0.0
>
>
> In the case of `insert into...select...limit` , `CollectLimitExec` has better
> execution performance than `GlobalLimit` .
> Before:
> {code:java}
> == Physical Plan ==
> Execute InsertIntoHadoopFsRelationCommand ...
> +- *(2) GlobalLimit 5
> +- Exchange SinglePartition, true, id=#39
> +- *(1) LocalLimit 5
> +- *(1) ColumnarToRow
> +- FileScan ...
> {code}
> After:
> {code:java}
> == Physical Plan ==
> Execute InsertIntoHadoopFsRelationCommand ...
> +- CollectLimit 5
> +- *(1) ColumnarToRow
> +- FileScan ....
> {code}
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