Because it is not possible to query efficiently to the administrator that manages the database other compliance updates, and an object of the update of the structure of the information group that is complicated, and stored in a database that is the source of the update request To ensure the integrity of the structure of the information group is to store the related information groups that require updated with the update of the structure of the information group stored in the database is a request source of the update request The prestored in a storage unit a reference relationship information for identifying other databases to have, it is determined whether or not the contents of the update request according to the structural change of the information group, the contents of the update request of the information group If it is determined that relates to a structural change, to extract the other database that stores the information group associated require updates to the basis of the reference relationship information, to ensure consistency , it is determined that the approval or disapproval of the update for the database that has been extracted, it is sent to the database that is the source of the update request approval or disapproval decision result.
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