Hi!
On Mon, Nov 16, 2020 at 1:09 PM <a.pervushina@postgrespro.ru> wrote:
> I've changed the BEGIN WAIT FOR LSN statement to core functions
> pg_waitlsn, pg_waitlsn_infinite and pg_waitlsn_no_wait.
> Currently the functions work inside repeatable read transactions, but
> waitlsn creates a snapshot if called first in a transaction block, which
> can possibly lead the transaction to working incorrectly, so the
> function gives a warning.
>
> Usage examples
> ==========
> select pg_waitlsn(‘LSN’, timeout);
> select pg_waitlsn_infinite(‘LSN’);
> select pg_waitlsn_no_wait(‘LSN’);
The name pg_waitlsn_no_wait() looks confusing. I've tried to see how
it's documented, but the patch doesn't contain documentation...
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Regards,
Alexander Korotkov