CREATE TABLE IF NOT EXISTS rollen_gruppen (
    rolle_id UUID NOT NULL,
    gruppe_id UUID NOT NULL,

    CONSTRAINT pk_rollen_gruppen PRIMARY KEY (rolle_id, gruppe_id),

    CONSTRAINT fk_rollen_gruppen_gruppe FOREIGN KEY (gruppe_id)
    REFERENCES gruppen (id) MATCH SIMPLE
    ON UPDATE CASCADE
    ON DELETE CASCADE,

    CONSTRAINT fk_rollen_gruppen_rolle FOREIGN KEY (rolle_id)
    REFERENCES rollen (id) MATCH SIMPLE
    ON UPDATE CASCADE
    ON DELETE CASCADE
)