metanil commented on code in PR #55885:
URL: https://github.com/apache/spark/pull/55885#discussion_r3471021758
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/physical/partitioning.scala:
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@@ -641,19 +640,15 @@ object KeyedPartitioning {
def supportsExpressions(expressions: Seq[Expression]): Boolean = {
def isSupportedTransform(transform: TransformExpression): Boolean = {
- transform.children.size == 1 && isReference(transform.children.head)
- }
-
- @tailrec
- def isReference(e: Expression): Boolean = e match {
- case _: Attribute => true
- case g: GetStructField => isReference(g.child)
- case _ => false
+ // Should only consider column references, not literals.
+ val nonLiteralChildren =
transform.children.filterNot(_.isInstanceOf[Literal])
+ // We need exactly one column reference per transform.
+ nonLiteralChildren.size == 1 &&
TransformExpression.isColumnRef(nonLiteralChildren.head)
Review Comment:
@sunchao Thanks. I was able to reproduce this issue which raises
ClassCastException.
I'll work on a fix, and let you know.
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