MaxGekk commented on code in PR #41578: URL: https://github.com/apache/spark/pull/41578#discussion_r1233874129
########## sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/UnsupportedOperationChecker.scala: ########## @@ -509,7 +509,24 @@ object UnsupportedOperationChecker extends Logging { throwError("Sampling is not supported on streaming DataFrames/Datasets") case Window(_, _, _, child) if child.isStreaming => - throwError("Non-time-based windows are not supported on streaming DataFrames/Datasets") + val windowExpression = subPlan.asInstanceOf[Window].windowExpressions + val windowFuncs = windowExpression.flatMap { e => + e.collect { + case we: WindowExpression => + s"'${we.windowFunction}' as column '${e.toAttribute.sql}'" + } + }.mkString(", ") + val windowSpec = windowExpression.flatMap { e => + e.collect { + case we: WindowExpression => we.windowSpec.sql + } + }.mkString(", ") + throw new AnalysisException( + s"Window function is not supported in $windowFuncs on streaming DataFrames/Datasets. " + + "Structured Streaming only supports time-window aggregation using the `window` " + + s"function. (window specification: '$windowSpec')", Review Comment: Could you introduce an error class with this error format, and put it to `error-classes.json`, please. Also cc @HeartSaVioR for checking semantic. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org