Re: Add WALRCV_CONNECTING state to walreceiver

On Mon, Jan 19, 2026 at 11:35:28PM +0800, Xuneng Zhou wrote:
> On Mon, Jan 19, 2026 at 8:13 AM Michael Paquier <michael(at)paquier(dot)xyz> wrote:
>> I think that
>> there would be a point in expanding the SQL functions to report more
>> states of the startup process, including the data received by the
>> startup process, but we should not link that to the state of the WAL
>> receiver. An extra reason to not do that: WAL receivers are not the
>> only source feeding data to the startup process, we could have data
>> pushed to pg_wal/, or archive commands/modules doing this job.
>
> +1. I'll prepare a separate patch to expose startup process metrics
> like pg_stat_get_wal_receiver does. This would complement
> pg_stat_wal_receiver without coupling the two subsystems.

In this area, I mean to expose the contents of XLogRecoveryCtlData at
SQL level. It may be better to move this structure to a header, and
have the new SQL function in xlogfuncs.c. That's at least how I would
shape such a change.
--
Michael