rdblue commented on code in PR #12238:
URL: https://github.com/apache/iceberg/pull/12238#discussion_r1980206785


##########
core/src/main/java/org/apache/iceberg/avro/AvroSchemaVisitor.java:
##########
@@ -33,21 +36,30 @@ public static <T> T visit(Schema schema, 
AvroSchemaVisitor<T> visitor) {
         Preconditions.checkState(
             !visitor.recordLevels.contains(name), "Cannot process recursive 
Avro record %s", name);
 
-        visitor.recordLevels.push(name);
+        if (schema.getLogicalType() instanceof VariantLogicalType) {
+          Preconditions.checkArgument(
+              AvroSchemaUtil.isVariantSchema(schema), "Invalid variant record: 
%s", schema);
 
-        List<Schema.Field> fields = schema.getFields();
-        List<String> names = Lists.newArrayListWithExpectedSize(fields.size());
-        List<T> results = Lists.newArrayListWithExpectedSize(fields.size());
-        for (Schema.Field field : schema.getFields()) {
-          names.add(field.name());
-          T result = visitWithName(field.name(), field.schema(), visitor);
-          results.add(result);
+          return visitor.variant(
+              schema,
+              visit(schema.getField(METADATA).schema(), visitor),
+              visit(schema.getField(VALUE).schema(), visitor));

Review Comment:
   Should this be `visitWithName(METADATA, schema, visitor)`? That is used for 
map key/value and array elements.



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