cloud-fan commented on code in PR #38415:
URL: https://github.com/apache/spark/pull/38415#discussion_r1009076916
##########
connector/connect/src/main/protobuf/spark/connect/relations.proto:
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@@ -213,3 +213,13 @@ message Sample {
int64 seed = 1;
}
}
+
+// Relation alias.
+message SubqueryAlias {
+ // Required. The input relation.
+ Relation input = 1;
+ // Required. The alias.
Review Comment:
how can we check if it's present or not, given the default value is empty
string?
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