>> I have a table of users permissions by departments >> >> CREATE TABLE permission ( >> id serial, >> user_id CHAR(10) NOT NULL REFERENCES user, >> permission_id CHAR(10) NOT NULL REFERENCES privilege, >> department_id CHAR(10) REFERENCES department , >> UNIQUE ( user_id, permission_id, department_id ) ) >> if department _id is NULL, user has access to all departments data. >> How I should rethink this data design to be implemented in CREATE TABLE >> statement ? > You should use a value like 'ALL' to denote that they have access to all > departments. Null, in this case, would mean you don't know which > departments they have access to, and this is not really the case. Using department ALL breaks the department_id reference to department table. Inserting department_id ALL is rejected since there is no such department. So I can use department ALL ? Andrus. ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
