wmoustafa commented on code in PR #5704:
URL: https://github.com/apache/iceberg/pull/5704#discussion_r979284252


##########
core/src/main/java/org/apache/iceberg/avro/ProjectionDatumReader.java:
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@@ -60,6 +60,7 @@ public void setRowPositionSupplier(Supplier<Long> 
posSupplier) {
   @Override
   public void setSchema(Schema newFileSchema) {
     this.fileSchema = newFileSchema;
+    AvroSchemaUtil.convertToDeriveNameMapping(this.fileSchema);
     if (nameMapping == null && !AvroSchemaUtil.hasIds(fileSchema)) {
       nameMapping = MappingUtil.create(expectedSchema);

Review Comment:
   I was under the impression that we would add name/type name information to 
the `nameMapping` maps. For example ("int" -> 2, "com.my.namespace.MyRecord" -> 
3). @rdblue, what do you think?



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