Re: display hot standby state in psql prompt

Hi Chao

On 30/10/2025 08:51, Chao Li wrote:
> I did a quick test, and found a problem. I shutdown the server, and “\c” reconnecting failed, but psql still show
“read/write”,which seems wrong:
 
> 
> "read/write"\c
> connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory
>     Is the server running locally and accepting connections on that socket?
> Previous connection kept

I can see that a "read/write" prompt in this case sounds misleading, but
I am not entirely sure it is a problem. The message says "Previous
connection kept", which might suggest that the previous parameter values
are cached? See %p:

postgres=# \set PROMPT1 '[%p] # '
[1268754] # \c
connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file
or directory
        Is the server running locally and accepting connections on that
socket?
Previous connection kept
[1268754] #

The backend pid is still displayed, although the server is no longer
running.
 > Why wrap “unknown” in "_()” but not “read-only” and “read/write”?
It didn't occur to me that read-only and read/write needed translation,
but I guess you're right. I'll add to the next version.

Thanks for the review. Much appreciated!

Best, Jim