Good evening, I am struggling with the syntax, please help.
This query with a CTE works ok:
WITH
extract_letters AS (
SELECT
mid,
STRING_AGG(x->>'letter', '') AS
letters
FROM (
SELECT
mid,
JSONB_ARRAY_ELEMENTS(tiles) AS x
FROM words_moves
WHERE action='play'
) z
GROUP BY mid)
SELECT * from extract_letters;
mid | letters
--------+---------
12 | АКЖОЛ
15 | ДМО
16 | ТО
20 | ШГА
21 | КТИ
22 | ВОЗ
24 | АКПОНК
But UPDATEing from the CTE does not -
WITH extract_letters AS (
SELECT
mid,
STRING_AGG(x->>'letter', '') AS letters
FROM (
SELECT
mid,
JSONB_ARRAY_ELEMENTS(tiles) AS x
FROM words_moves
WHERE action='play'
) z
GROUP BY mid)
UPDATE words_moves m
SET m.letters =
el.letters
FROM
extract_letters el
WHERE
m.mid = el.mid;
ERROR: 42703: column "m" of relation "words_moves" does not exist
LINE 14: SET m.letters = el.letters
^
Regards
Alex
