Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/21587#discussion_r196652632 --- Diff: sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/DistributionSuite.scala --- @@ -41,34 +41,127 @@ class DistributionSuite extends SparkFunSuite { } } - test("HashPartitioning (with nullSafe = true) is the output partitioning") { - // Cases which do not need an exchange between two data properties. + test("UnspecifiedDistribution and AllTuples") { --- End diff -- I've reorganized this test suite and added a bunch of new test cases, to improve the test coverage.
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