Skip unshredded fast-path when VariantType fields are present

Author: codephage2020

parquet-variant-compute/src/variant_get.rs

@@ -224,7 +224,10 @@ fn shredded_get_path(
     // For shredded/partially-shredded targets (`typed_value` present), recurse into each field
     // separately to take advantage of deeper shredding in child fields.
     if let DataType::Struct(fields) = as_field.data_type() {
-        if target.typed_value_field().is_none() {
+        let has_variant_fields = fields
+            .iter()
+            .any(|f| f.try_extension_type::<VariantType>().is_ok());
+        if target.typed_value_field().is_none() && !has_variant_fields {
             return shred_basic_variant(target, VariantPath::default(), Some(as_field));
         }