Github user rxin commented on a diff in the pull request: https://github.com/apache/spark/pull/16289#discussion_r92545873 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/UnsupportedOperationChecker.scala --- @@ -95,6 +96,15 @@ object UnsupportedOperationChecker { // Operations that cannot exists anywhere in a streaming plan subPlan match { + case Aggregate(_, aggregateExpressions, child) => + val distinctAggExprs = aggregateExpressions.flatMap { expr => + expr.collect { case ae: AggregateExpression if ae.isDistinct => ae } + } + throwErrorIf( + child.isStreaming && distinctAggExprs.nonEmpty, + "Distinct aggregations are not supported on streaming DataFrames/Datasets, unless" + --- End diff -- you need an extra space here. I'd also recommend users using approximate distinct.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org