Reduzieren des JSONB-Arrays in Postgres

SELECT  id, jo.obj
FROM    mytable
CROSS JOIN
        LATERAL
        (
        SELECT  JSON_OBJECT_AGG(jt.key, jt.value) obj
        FROM    JSONB_ARRAY_ELEMENTS(data) je
        CROSS JOIN
                LATERAL JSONB_EACH(je.value) jt
        ) jo