Обсуждение: error on „ 38.5. Query Language (SQL) Functions“: a single row is returned

Поиск
Список
Период
Сортировка

error on „ 38.5. Query Language (SQL) Functions“: a single row is returned

От
PG Doc comments form
Дата:
The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/14/xfunc-sql.html
Description:

On the page „ 38.5. Query Language (SQL) Functions“ below the example

CREATE FUNCTION new_emp() RETURNS emp AS $$
    SELECT ROW('None', 1000.0, 25, '(2,2)')::emp;
$$ LANGUAGE SQL;

this sentence is wrong:

„ Here we wrote a SELECT that returns just a single column of the correct
composite type.“

It is not a single column but a single row that is returned.

Re: error on „ 38.5. Query Language (SQL) Functions“: a single row is returned

От
Tom Lane
Дата:
PG Doc comments form <noreply@postgresql.org> writes:
> The following documentation comment has been logged on the website:
> Page: https://www.postgresql.org/docs/14/xfunc-sql.html
> Description:

> On the page „ 38.5. Query Language (SQL) Functions“ below the example

> CREATE FUNCTION new_emp() RETURNS emp AS $$
>     SELECT ROW('None', 1000.0, 25, '(2,2)')::emp;
> $$ LANGUAGE SQL;

> this sentence is wrong:

> „ Here we wrote a SELECT that returns just a single column of the correct
> composite type.“

> It is not a single column but a single row that is returned.

It's also a single column, which is more relevant to the point being
made.  Compare this to the immediately preceding example.

            regards, tom lane