MisterRaindrop commented on code in PR #127:
URL: https://github.com/apache/iceberg-cpp/pull/127#discussion_r2166845335


##########
src/iceberg/avro/avro_reader.cc:
##########
@@ -96,11 +99,22 @@ class AvroBatchReader::Impl {
     // Validate field ids in the file schema.
     HasIdVisitor has_id_visitor;
     ICEBERG_RETURN_UNEXPECTED(has_id_visitor.Visit(file_schema));
+
     if (has_id_visitor.HasNoIds()) {
-      // TODO(gangwu): support applying field-ids based on name mapping
-      return NotImplemented("Avro file schema has no field IDs");
-    }
-    if (!has_id_visitor.AllHaveIds()) {
+      // Apply field IDs based on name mapping if available
+      auto name_mapping_iter = options.properties.find("name_mapping");

Review Comment:
   It’s great to put them in common places. Do we have a file to put them in, 
or do I need to create a file for common places?



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