Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/19828#discussion_r154158225
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
---
@@ -839,8 +839,6 @@ case class RepartitionByExpression(
require(numPartitions > 0, s"Number of partitions ($numPartitions) must
be positive.")
- require(partitionExpressions.nonEmpty, "At least one partition-by
expression must be specified.")
--- End diff --
Just for safety, also keep this change?
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