PQhost(), PQhostaddr() or PQport() typically return a host parameter or hostaddr parameter or port parameter specified in the connection string by the user application. However, if you specify a connection destination for the conmgr process, the destination for the conmgr process you specify will be changed to the database connection destination information provided by the conmgr process before the connection is completed. This behavior is similar to simply specifying multiple hosts in the connection string without using the Connection Manager.