Chyba pochází od postgresu, ne od djanga. Můžete to přepsat jako:
WITH v_table_name AS
(
SELECT row_number() over (partition by col2 order by col3) AS rn, primary_key
FROM table_name
)
UPDATE table_name set table_name.col1 = v_table_name.rn
FROM v_table_name
WHERE table_name.primary_key = v_table_name.primary_key;
Nebo alternativně:
UPDATE table_name set table_name.col1 = v_table_name.rn
FROM
(
SELECT row_number() over (partition by col2 order by col3) AS rn, primary_key
FROM table_name
) AS v_table_name
WHERE table_name.primary_key = v_table_name.primary_key;
Tohle funguje. Právě jsem to testoval na postgres-9.6. Zde je syntaxe pro UPDATE (viz volitelný fromlist ).
Doufám, že to pomůže.