cloud-fan commented on code in PR #38415:
URL: https://github.com/apache/spark/pull/38415#discussion_r1007551962
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connector/connect/src/main/protobuf/spark/connect/relations.proto:
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@@ -47,6 +47,13 @@ message Relation {
Unknown unknown = 999;
}
+ // Optional. Every relation might have an alias.
Review Comment:
I don't have a strong opinion, but not sure which one is better. We can also
follow catalyst, and add a new plan `SubqueryAlias(child, alias)`
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