L'erreur vient de postgres et non de django. Vous pouvez réécrire ceci comme :
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;
Ou alternativement :
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;
Cela marche. Je viens de le tester sur postgres-9.6. Voici la syntaxe pour UPDATE (voir l'option fromlist ).
J'espère que cela vous aidera.
