cloud-fan commented on code in PR #52443:
URL: https://github.com/apache/spark/pull/52443#discussion_r2378347599
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sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/ShuffleSpecSuite.scala:
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@@ -479,4 +480,72 @@ class ShuffleSpecSuite extends SparkFunSuite with
SQLHelper {
"methodName" -> "createPartitioning$",
"className" ->
"org.apache.spark.sql.catalyst.plans.physical.ShuffleSpec"))
}
+
+ test("compatibility: ShufflePartitionIdPassThroughSpec on both sides") {
+ val dist = ClusteredDistribution(Seq($"a", $"b"))
+ val p1 = ShufflePartitionIdPassThrough(DirectShufflePartitionID($"a"), 10)
+ val p2 = ShufflePartitionIdPassThrough(DirectShufflePartitionID($"c"), 10)
+
+ // Identical specs should be compatible
+ checkCompatible(
+ p1.createShuffleSpec(dist),
+ p2.createShuffleSpec(ClusteredDistribution(Seq($"c", $"d"))),
+ expected = true
+ )
+
+ // Different number of partitions should be incompatible
+ val p3 = ShufflePartitionIdPassThrough(DirectShufflePartitionID($"c"), 5)
+ checkCompatible(
+ p1.createShuffleSpec(dist),
+ p3.createShuffleSpec(ClusteredDistribution(Seq($"c", $"d"))),
+ expected = false
+ )
+
+ // Mismatched key positions should be incompatible
+ val dist1 = ClusteredDistribution(Seq($"a", $"b"))
Review Comment:
This is the same as `dist`?
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