amaliujia commented on code in PR #38935:
URL: https://github.com/apache/spark/pull/38935#discussion_r1041613292
##########
connector/connect/src/main/protobuf/spark/connect/expressions.proto:
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@@ -173,4 +174,18 @@ message Expression {
// (Optional) Alias metadata expressed as a JSON map.
optional string metadata = 3;
}
+
+ // Case statements of the form "CASE WHEN a THEN b [WHEN c THEN d]* [ELSE e]
END".
+ message CaseWhen {
Review Comment:
If we use this way then have to document it clear for even/odd assumption on
the server side.
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