HonahX commented on code in PR #498:
URL: https://github.com/apache/iceberg-python/pull/498#discussion_r1550918541


##########
pyiceberg/table/__init__.py:
##########
@@ -760,7 +852,10 @@ def update_table_metadata(base_metadata: TableMetadata, 
updates: Tuple[TableUpda
     for update in updates:
         new_metadata = _apply_table_update(update, new_metadata, context)
 
-    return new_metadata.model_copy(deep=True)
+    if enforce_validation:
+        return TableMetadataUtil.parse_obj(new_metadata.model_dump())

Review Comment:
   👍 Since for create-table-transaction commit, we are generating the entire 
metadata model via a chain of `model_copy` without any validation, I feel it 
safer to trigger a validation on the model before return :D



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