imback82 commented on a change in pull request #27842: [SPARK-31078][SQL]
Respect aliases in output ordering
URL: https://github.com/apache/spark/pull/27842#discussion_r389331709
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/sources/BucketedReadSuite.scala
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@@ -604,6 +604,18 @@ abstract class BucketedReadSuite extends QueryTest with
SQLTestUtils {
}
}
+ test("sort should not be introduced when aliases are used") {
+ withSQLConf(SQLConf.AUTO_BROADCASTJOIN_THRESHOLD.key -> "0") {
+ withTable("t") {
+ df1.repartition(1).write.format("parquet").bucketBy(8,
"i").sortBy("i").saveAsTable("t")
Review comment:
Do you mean something like the following?
```
val t1 = spark.range(10).selectExpr("id as k1").orderBy("k1")
.selectExpr("k1 as k11").orderBy("k11")
val t2 = spark.range(10).selectExpr("id as k2").orderBy("k2")
t1.join(t2, t1("k11") === t2("k2")).explain(true)
```
Extra `Sort` is optimized away, so it doesn't affect the physical plan (no
extra sort) without this change.
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