disable making a connection pool when we are talking to datawarehouses.

src/metabase/driver/postgres/connection.clj

@@ -16,6 +16,7 @@
         {:keys [host dbname port host]} details]
     (-> details
         (assoc :host host                                     ; e.g. "localhost"
+               :make-pool? false
                :db-type :postgres                             ; HACK hardcoded to postgres for time being until API has a way to choose DB type !
                :port (Integer/parseInt port))                 ; convert :port to an Integer
         (cond-> (config/config-bool :mb-postgres-ssl) (assoc :ssl true :sslfactory "org.postgresql.ssl.NonValidatingFactory"))