cloud-fan commented on code in PR #37612:
URL: https://github.com/apache/spark/pull/37612#discussion_r958612230
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sql/core/src/test/scala/org/apache/spark/sql/execution/adaptive/AdaptiveQueryExecSuite.scala:
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@@ -2643,6 +2643,50 @@ class AdaptiveQueryExecSuite
assert(findTopLevelBroadcastNestedLoopJoin(adaptivePlan).size == 1)
}
}
+
+ test("SPARK-39915: Dataset.repartition(N) may not create N partitions") {
+ withSQLConf(SQLConf.SHUFFLE_PARTITIONS.key -> "6") {
+ // partitioning: HashPartitioning
+ // shuffleOrigin: REPARTITION_BY_NUM
+ assert(spark.range(0).repartition(5).rdd.getNumPartitions == 5)
+ assert(spark.range(0).repartition(5, $"id").rdd.getNumPartitions == 5)
+ // shuffleOrigin: REPARTITION_BY_COL
+ // The minimum partition number after AQE coalesce is 1
+ assert(spark.range(0).repartition($"id").rdd.getNumPartitions == 1)
+ // not retained output partitioning
Review Comment:
why is this not retained? repartition under Project should be respected.
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