c21 commented on a change in pull request #35529:
URL: https://github.com/apache/spark/pull/35529#discussion_r806676280
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File path:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/DistributionSuite.scala
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@@ -265,4 +267,80 @@ class DistributionSuite extends SparkFunSuite {
ClusteredDistribution(Seq($"a", $"b", $"c"), Some(5)),
false)
}
+
+ test("Structured Streaming output partitioning and distribution") {
+ // Validate HashPartitioning.partitionIdExpression to be exactly expected
format, because
+ // Structured Streaming state store requires it to be consistent across
Spark versions.
+ val expressions = Seq($"a", $"b", $"c")
+ val hashPartitioning = HashPartitioning(expressions, 10)
+ hashPartitioning.partitionIdExpression match {
+ case Pmod(Murmur3Hash(es, 42), Literal(10, IntegerType), _) =>
+ assert(es.length == expressions.length && es.zip(expressions).forall {
+ case (l, r) => l.semanticEquals(r)
+ })
+ case x => fail(s"Unexpected partitionIdExpression $x for
$hashPartitioning")
+ }
+
+ // Validate only HashPartitioning (and HashPartitioning in
PartitioningCollection) can satisfy
Review comment:
Covered all subclasses of `Partitioning` here, except
`DataSourcePartitioning`, because `DataSourcePartitioning` is not accessible
from this unit test.
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