belugabehr commented on a change in pull request #820:
URL: https://github.com/apache/parquet-mr/pull/820#discussion_r497642803
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File path:
parquet-protobuf/src/main/java/org/apache/parquet/proto/ProtoWriteSupport.java
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@@ -337,6 +337,12 @@ private void writeAllFields(MessageOrBuilder pb) {
List<FieldDescriptor> fieldDescriptors = messageDescriptor.getFields();
for (FieldDescriptor fieldDescriptor : fieldDescriptors) {
FieldDescriptor.Type type = fieldDescriptor.getType();
+
+ //For a field in a oneOf that isn't set don't write anything
+ if (fieldDescriptor.getContainingOneof() != null &&
!pb.hasField(fieldDescriptor)) {
+ continue;
+ }
Review comment:
What about the read side? Is there going to be any issue there?
Currently a value is always written, so there is always a value to read. With
this change, the value is not written. Can the read-side handle this?
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