cloud-fan commented on a change in pull request #25121: [SPARK-28356][SQL] Do
not reduce the number of partitions for repartition in adaptive execution
URL: https://github.com/apache/spark/pull/25121#discussion_r303279294
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/execution/ReduceNumShufflePartitionsSuite.scala
##########
@@ -574,22 +574,17 @@ class ReduceNumShufflePartitionsSuite extends
SparkFunSuite with BeforeAndAfterA
withSparkSession(test, 4, None)
}
- test("Union two datasets with different pre-shuffle partition number") {
+ test("Do not reduce the number of shuffle partition for repartition") {
val test: SparkSession => Unit = { spark: SparkSession =>
- val dataset1 = spark.range(3)
- val dataset2 = spark.range(3)
-
- val resultDf = dataset1.repartition(2, dataset1.col("id"))
- .union(dataset2.repartition(3, dataset2.col("id"))).toDF()
+ val ds = spark.range(3)
+ val resultDf = ds.repartition(2, ds.col("id")).toDF()
checkAnswer(resultDf,
- Seq((0), (0), (1), (1), (2), (2)).map(i => Row(i)))
+ Seq((0), (1), (2)).map(i => Row(i)))
Review comment:
this is just `Seq(0, 1, 2)`, right?
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