cloud-fan commented on a change in pull request #35609:
URL: https://github.com/apache/spark/pull/35609#discussion_r812966259
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
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@@ -277,11 +277,18 @@ case class Union(
assert(!allowMissingCol || byName, "`allowMissingCol` can be true only if
`byName` is true.")
override def maxRows: Option[Long] = {
- if (children.exists(_.maxRows.isEmpty)) {
Review comment:
do you know which Spark version we start to have `Union.maxRows`?
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