robdiciuccio commented on a change in pull request #14287:
URL: https://github.com/apache/superset/pull/14287#discussion_r618620245



##########
File path: superset/db_engine_specs/base.py
##########
@@ -1024,7 +1024,7 @@ def estimate_query_cost(
         if not cls.get_allow_cost_estimate(extra):
             raise Exception("Database does not support cost estimation")
 
-        user_name = g.user.username if g.user else None
+        user_name = g.user.username if g.user and hasattr(g.user, "username") 
else None

Review comment:
       I originally was checking `g.user.is_anonymous` in these use cases, but 
opted for the explicit check for username, as this is the value that is being 
fetched. There _may_ be use cases where username is not present in other states 
down the road, so thought explicit `hasattr` would be more future-proof.




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