cloud-fan commented on code in PR #48748:
URL: https://github.com/apache/spark/pull/48748#discussion_r1840316260
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala:
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@@ -2216,21 +2216,25 @@ class Analyzer(override val catalogManager:
CatalogManager) extends RuleExecutor
numArgs: Int,
u: UnresolvedFunction): Expression = {
func match {
- case owg: SupportsOrderingWithinGroup if u.isDistinct =>
+ case owg: InverseDistributionFunction if u.isDistinct =>
Review Comment:
Not related to this PR, but it seems unnecessary to disallow DISTINCT for
functions supporting `WITHIN GROUP`. The Spark aggregation framework will
handle the DISTINCT and the function implementation doesn't need to care about
it at all.
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