zhengruifeng commented on code in PR #51561:
URL: https://github.com/apache/spark/pull/51561#discussion_r2289834569
##########
sql/connect/common/src/main/protobuf/spark/connect/expressions.proto:
##########
@@ -227,8 +227,21 @@ message Expression {
}
message Struct {
- DataType struct_type = 1;
+ // (Deprecated) The type of the struct.
+ //
+ // This field is deprecated since Spark 4.1+ because using DataType as
the type of a struct
+ // is ambiguous. This field should only be set if the data_type_struct
field is not set.
+ // Use data_type_struct field instead.
+ DataType struct_type = 1 [deprecated = true];
+
+ // (Required) The literal values that make up the struct elements.
repeated Literal elements = 2;
+
+ // The type of the struct.
+ //
+ // Whether data_type_struct.fields.data_type should be set depends on
+ // whether each field's type can be inferred from the elements field.
+ DataType.Struct data_type_struct = 3;
Review Comment:
@heyihong sorry for the late comments, what about introducing a new message
for this purpose?
for example, `SimplifiedStruct` or `LightStruct`, my feeling is that the
conversion in the server side become too complex
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