15. The method of claim 13 , wherein the request to the database server to switch the database identifier or switch the user identifier of the similar backend connection is transmitted when a user connection limit is not exceeded.
15. The method of claim 13 , wherein the request to the database server to switch the database identifier or switch the user identifier of the similar backend connection is transmitted when a user connection limit is not exceeded. 16. The method of claim 15 , further comprising identifying the user identifier and the database identifier of the database query if the user connection limit is not exceeded.