[GitHub] [spark] cloud-fan commented on a diff in pull request #38621: [SPARK-41111][CONNECT][PYTHON] Implement `DataFrame.show`

[GitBox <gi...@apache.org>]

cloud-fan commented on code in PR #38621:
URL: https://github.com/apache/spark/pull/38621#discussion_r1021065768


##########
connector/connect/src/main/protobuf/spark/connect/relations.proto:
##########
@@ -253,6 +254,23 @@ message Repartition {
   bool shuffle = 3;
 }
 
+// Compose the string representing rows for output.
+// It will invoke 'Dataset.showString' to compute the results.
+message ShowString {
+  // (Required). The input relation.
+  Relation input = 1;
+
+  // (Required) Number of rows to show.

Review Comment:
   is there a best practice in the industry? making everything optional is also fine to me, so that the server side can detect more malformed proto messages.



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