wangyum opened a new pull request #33946:
URL: https://github.com/apache/spark/pull/33946
### What changes were proposed in this pull request?
This pr removes the `Sort` if it is the child of `RepartitionByExpression`.
For example:
```sql
spark.range(10).selectExpr("cast(id AS
string)").sort("id").repartition($"id").explain()
```
Before this PR:
```
== Optimized Logical Plan ==
RepartitionByExpression [id#2]
+- Sort [id#2 ASC NULLS FIRST], true
+- Project [cast(id#0L as string) AS id#2]
+- Range (0, 10, step=1, splits=Some(2))
```
After this PR:
```
== Optimized Logical Plan ==
RepartitionByExpression [id#2]
+- Project [cast(id#0L as string) AS id#2]
+- Range (0, 10, step=1, splits=Some(2))
```
### Why are the changes needed?
Remove useless sort.
### Does this PR introduce _any_ user-facing change?
No.
### How was this patch tested?
Unit test.
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