turbaszek commented on code in PR #23767:
URL: https://github.com/apache/airflow/pull/23767#discussion_r875510449


##########
airflow/providers/snowflake/hooks/snowflake.py:
##########
@@ -290,7 +290,7 @@ def run(
         autocommit: bool = False,
         parameters: Optional[Union[Sequence[Any], Dict[Any, Any]]] = None,
         handler: Optional[Callable] = None,
-    ):
+    ) -> Optional[List]:

Review Comment:
   Is there any use case for empty `sql` argument? Maybe it would be better to 
raise `ValueError` instead of doing unnecessary connection opening. WDYT?



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