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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