CELL LEVEL DATA ACCESS CONTROL USING USER DEFINITION FUNCTION

摘要

PROBLEM TO BE SOLVED: To provide a flexible cell level access control based on an access means and execute an access means capable or reducing a system cost. SOLUTION: The cell level access control is provided by using a mask function 1222. An original inquiry 1102 is changed to include the mask function 1222 for a cell desired to be accessed. A filter function 1204 is included to delete a line according to the access means.