flyrain commented on code in PR #4091:
URL: https://github.com/apache/polaris/pull/4091#discussion_r3034703540


##########
runtime/service/src/main/java/org/apache/polaris/service/catalog/iceberg/IcebergCatalogHandler.java:
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@@ -849,14 +855,14 @@ private LoadTableResponse.Builder 
buildLoadTableResponseWithDelegationCredential
       return responseBuilder;
     }
 
-    if (baseCatalog instanceof IcebergCatalog
+    if (!isFederated

Review Comment:
   > If catalogFactory().createCallContextCatalog() returns something over than 
IcebergCatalog, the "previous" code would gracefully fall through to the else 
branch, 
   
   I don't think that's a graceful behavior. The `else` branch is for federated 
catalogs, `catalogFactory().createCallContextCatalog()` return a non federated 
catalog, the behavior is completely wrong. After this change, the code fail 
fast, maybe not the best way now, but better. We can continue to refactor to 
make it better in followup PRs. 



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