The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/17/sql-insert.html
Description:
Hi,
the example found in the doc above:
WITH upd AS (
UPDATE employees SET sales_count = sales_count + 1 WHERE id =
(SELECT sales_person FROM accounts WHERE name = 'Acme Corporation')
RETURNING *
)
INSERT INTO employees_log SELECT *, current_timestamp FROM upd;
might result into UPDATE 0 / INSERT 0 because the documentation regarding
the CTE states: "The sub-statements in WITH are executed concurrently with
each other and with the main query".
The subquery SELECT sales_person FROM accounts WHERE name = 'Acme
Corporation' might not be waited on by the UPDATE query resulting into an
UPDATE 0.
Is my suspicion valid?
