Ve verzi 9.4 je to jednoduché (použité funkce LATERAL join a jsonb):
postgres=# SELECT * FROM sample, jsonb_to_record(jsonb, true) AS x(a text, b text); id | jsonb | date | a | b ----+------------------------------+-------------+------+-------- 1 | {"a": "a", "b": "b"} | 2014-01-06 | a | b 2 | {"a": "a", "b": "b"} | 2014-01-06 | a | b 3 | {"a": "Ahoj", "b": "Nazdar"} | 2014-01-06 | Ahoj | Nazdar (3 rows)
přesný výsledek:
postgres=# SELECT id, a, b, date FROM sample, jsonb_to_record(jsonb, true) AS x(a text, b text); id | a | b | date ----+------+--------+------------ 1 | a | b | 2014-01-06 2 | a | b | 2014-01-06 3 | Ahoj | Nazdar | 2014-01-06 (3 rows)