cloud-fan commented on code in PR #38347:
URL: https://github.com/apache/spark/pull/38347#discussion_r1002849365


##########
connector/connect/src/main/protobuf/spark/connect/relations.proto:
##########
@@ -207,3 +208,23 @@ message Sample {
     int64 seed = 1;
   }
 }
+
+// Relation of type [[Range]] that generates a sequence of integers.
+message Range {
+  // Optional. Default value = 0
+  int32 start = 1;
+  int32 end = 2;

Review Comment:
   end is not optional, but how do we know if the client forgets to set it? 0 
is a valid end value as well.



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