ashb commented on code in PR #31567:
URL: https://github.com/apache/airflow/pull/31567#discussion_r1206741438


##########
airflow/providers/amazon/aws/hooks/redshift_sql.py:
##########
@@ -104,7 +104,9 @@ def get_iam_token(self, conn: Connection) -> tuple[str, 
str, int]:
         port = conn.port or 5439
         # Pull the custer-identifier from the beginning of the Redshift URL
         # ex. my-cluster.ccdre4hpd39h.us-east-1.redshift.amazonaws.com returns 
my-cluster
-        cluster_identifier = conn.extra_dejson.get("cluster_identifier", 
conn.host.split(".")[0])
+        cluster_identifier = conn.extra_dejson.get("cluster_identifier", None)
+        if conn.host and not cluster_identifier:
+            cluster_identifier = conn.host.split(".")[0]

Review Comment:
   Though I wonder why cluster identifier wasn't just put in the host.
   
   Being able to do `redshift://my cluster/db?iam=true` would be nice (maybe 
that boat has already sailed?)



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