1. In a distributed system that includes a system and another system, apparatus for authenticating a user to the another system, the user having non-public authentication information particular to the user in the system, the user requesting performance of an operation in the system and the system authenticating the user and redirecting the operation to the another system for performance, the apparatus comprising: at least one processor that is at least to: authenticate the user on the system using at least a username and the non-public authentication information both particular to the user; receive an operation, which references one or more stored procedures that are executed to complete the operation, from the user on the system, the system comprising a database view that does not include at least one of the one or more stored procedures to complete the operation; authenticate or cause to authenticate an authentication proxy in the system on the another system using credentials of the authentication proxy rather than using the non-public authentication information particular to the user; use the authentication proxy to redirect the operation to the another system, wherein the authentication proxy having a privilege that permits the authentication proxy to enable the another system to perform and complete the operation for the user; and perform modifications on the database view, which does not redirect the operation before the modifications, on the system to support redirection from the database view to the another system that includes the at least one of the one or more stored procedures to complete the operation.