--DROP TABLE user_roles PURGE;
CREATE TABLE user_roles (
    app_id              NUMBER(4)       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_user_roles_app_id
        FOREIGN KEY (app_id)
        REFERENCES apps (app_id),
    --
    CONSTRAINT fk_user_roles_user_id
        FOREIGN KEY (user_id)
        REFERENCES users (user_id)
        DEFERRABLE INITIALLY DEFERRED,
    --
    CONSTRAINT fk_user_roles_role_id
        FOREIGN KEY (app_id, role_id)
        REFERENCES roles (app_id, role_id)
        DEFERRABLE INITIALLY DEFERRED
)
STORAGE (BUFFER_POOL KEEP);
--
ALTER TABLE user_roles MODIFY CONSTRAINT fk_user_roles_user_id DISABLE;  -- to assign roles before user is created
--
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';