Github user marmbrus commented on a diff in the pull request: https://github.com/apache/spark/pull/16360#discussion_r93508333 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/streaming/DataStreamWriter.scala --- @@ -219,7 +221,13 @@ final class DataStreamWriter[T] private[sql](ds: Dataset[T]) { if (extraOptions.get("queryName").isEmpty) { throw new AnalysisException("queryName must be specified for memory sink") } - + outputMode match { + case Append | Complete => // allowed + case Update => + throw new AnalysisException("Update ouptut mode is not supported for memory format") --- End diff -- "memory sink" for consistency with the above error
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