amaliujia commented on code in PR #39084:
URL: https://github.com/apache/spark/pull/39084#discussion_r1051074565
##########
connector/connect/common/src/main/protobuf/spark/connect/relations.proto:
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@@ -601,3 +602,19 @@ message Unpivot {
// (Required) Name of the value column.
string value_column_name = 5;
}
+
+message ToSchema {
+ // (Required) The input relation.
+ Relation input = 1;
+
+ // (Required) The user provided schema.
+ //
+ // The Sever side will update the dataframe with this schema.
+ oneof schema {
+
+ DataType datatype = 2;
Review Comment:
Maybe comment here to say this must be a StructType?
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