CREATE TABLE user_roles (
    app_id                          NUMBER(4,0)     CONSTRAINT nn_user_roles_app_id NOT NULL,
    user_id                         VARCHAR2(30)    CONSTRAINT nn_user_roles_user_id NOT NULL,
    role_id                         VARCHAR2(30)    CONSTRAINT nn_user_roles_role_id NOT NULL,
    updated_by                      VARCHAR2(30),
    updated_at                      DATE,
    --
    CONSTRAINT pk_user_roles
        PRIMARY KEY (app_id, user_id, role_id)
    --
    CONSTRAINT fk_users_roles_app_id
        FOREIGN KEY (app_id)
        REFERENCES apps (app_id),
    --
    CONSTRAINT fk_users_roles_role_id
        FOREIGN KEY (app_id, role_id)
        REFERENCES roles (app_id, role_id)
        DEFERRABLE INITIALLY DEFERRED,
    --
    CONSTRAINT fk_users_roles_user_id
        FOREIGN KEY (user_id)
        REFERENCES users (user_id)
        DEFERRABLE INITIALLY DEFERRED DISABLE
);
--
COMMENT ON TABLE user_roles IS '[CORE] List of roles assigned to users';
--
COMMENT ON COLUMN user_roles.app_id     IS 'APEX application ID';
COMMENT ON COLUMN user_roles.user_id    IS 'User ID from USERS table';
COMMENT ON COLUMN user_roles.role_id    IS 'Role ID from ROLES table';