A compiler, which makes a computer carry out a process for generating a program used for a remote access to a virtual database comprising a first computer 11 including an application program and a second computer 12 being connected to the first computer 11 by way of a network and including one or more databases, replaces (1c) a description part relating to a DML execution process for the virtual database from a source code 7 of the application program with a description relating to an RPC process and generates a program for executing the DML execution process for the native databases based on the RPC process. The use of the program enables a high performance remote database access while applying a virtual database function aiming at facilitating a business logic buildup.