SandishKumarHN commented on code in PR #38922:
URL: https://github.com/apache/spark/pull/38922#discussion_r1044001778
##########
connector/protobuf/src/main/scala/org/apache/spark/sql/protobuf/utils/ProtobufOptions.scala:
##########
@@ -38,6 +38,12 @@ private[sql] class ProtobufOptions(
val parseMode: ParseMode =
parameters.get("mode").map(ParseMode.fromString).getOrElse(FailFastMode)
+
+ val circularReferenceType: String =
parameters.getOrElse("circularReferenceType", "FIELD_NAME")
Review Comment:
```
message A {
B b = 1;
}
message B {
A aa = 1;
D d = 2;
}
message D {
A aaa = 1;
E a =2;
}
message E {
int32 key = 1;
}
```
@rangadi just correcting the second example. in the case of field_name base
recursive check. we would fail to detect the recursion for above because the
thread would be ```A.B.A.aa.D.d.A.aaa.E``` set would have unique values [A,
B.b, A.aa, A.aaa, E.a], but in the case of @baganokodo2022 proposal it would be
```A.B.A.D.A.E``` would takeout field_name so early detection for recursion.
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