heyihong commented on code in PR #52342:
URL: https://github.com/apache/spark/pull/52342#discussion_r2355262809
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sql/connect/common/src/main/protobuf/spark/connect/expressions.proto:
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@@ -207,6 +207,10 @@ message Expression {
Time time = 26;
}
+ // The data type information of the literal.
+ // This field is only required for the root literal message.
+ DataType data_type = 100;
Review Comment:
Messages in protobuf are always optional. If the data_type field is not set,
we fall back to inferring the data type or using the deprecated data type
fields.
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