zhengruifeng commented on code in PR #39068:
URL: https://github.com/apache/spark/pull/39068#discussion_r1050335559
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connector/connect/common/src/main/protobuf/spark/connect/expressions.proto:
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@@ -167,4 +169,26 @@ message Expression {
// (Optional) Alias metadata expressed as a JSON map.
optional string metadata = 3;
}
+
+ message LambdaFunction {
Review Comment:
> How would the lambda function look like for using the `CaseWhen` route?
this one https://github.com/apache/spark/pull/38956, we build the
expressions in Connect Planner other than let `FunctionRegistry` do this
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