Re: Emitting JSON to file using COPY TO - Mailing list pgsql-hackers

On Thu, 7 Dec 2023 at 01:10, Joe Conway <mail@joeconway.com> wrote:
>
> The attached should fix the CopyOut response to say one column.
>

Playing around with this, I found a couple of cases that generate an error:

COPY (SELECT 1 UNION ALL SELECT 2) TO stdout WITH (format json);

COPY (VALUES (1), (2)) TO stdout WITH (format json);

both of those generate the following:

ERROR:  record type has not been registered

Regards,
Dean