rangadi commented on code in PR #40686:
URL: https://github.com/apache/spark/pull/40686#discussion_r1179415611
##########
connector/protobuf/src/main/scala/org/apache/spark/sql/protobuf/utils/ProtobufOptions.scala:
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@@ -46,9 +47,35 @@ private[sql] class ProtobufOptions(
// record has more depth than the allowed value for recursive fields, it
will be truncated
// and corresponding fields are ignored (dropped).
val recursiveFieldMaxDepth: Int =
parameters.getOrElse("recursive.fields.max.depth", "-1").toInt
+
+ // Whether or not to explicitly materialize the zero values for fields
+ // without field presence information
https://protobuf.dev/programming-guides/field_presence/.
+ // This includes most fields in proto3.
+ //
+ // For example, if we have a proto like
+ // ```
+ // syntax = "proto3";
+ // message Example {
+ // string s = 1;
+ // int64 i = 2;
Review Comment:
I don't think so. Try it.
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