DATABASE INTEGRATION DEVICE, DATABASE INTEGRATION METHOD AND DATABASE INTEGRATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a database integration device and the like capable of executing combining processing at a higher speed.SOLUTION: The database integration device has a reception part, a determination part, a generation part and an execution part. The reception part receives a request to combine a plurality of pieces of data to be combined from a client. The determination part determines a database system to execute combining processing on the basis of combination propriety information indicating whether each of database systems combined which has a databases storing a piece of data to be combined, specified by the request can execute the combining processing by reading a piece of data to be combined from other database system of the combination partner and whether the database system combined can cause the other database system of the combination partner to read that piece of data to be combined. The generation part generates an execution plan to execute the combining processing. The execution part transmits the request to the database systems on the basis of the execution plan.SELECTED DRAWING: Figure 2