Re: GUC names in messages - Mailing list pgsql-hackers

On Wed, Nov 1, 2023 at 8:02 PM Peter Smith <smithpb2250@gmail.com> wrote:
...
>
> I had intended to make a patch to address the inconsistency, but
> couldn't decide which of those styles was the preferred one.
>
> Then I worried this could be the tip of the iceberg -- GUC names occur
> in many other error messages where they are sometimes quoted and
> sometimes not quoted:
> e.g. Not quoted -- errhint("You might need to run fewer transactions
> at a time or increase max_connections.")));
> e.g. Quoted -- errmsg("\"max_wal_size\" must be at least twice
> \"wal_segment_size\"")));
>
> Ideally, they should all look the same everywhere, shouldn't they?
>

One idea to achieve consistency might be to always substitute GUC
names using a macro.

#define GUC_NAME(s) ("\"" s "\"")

ereport(ERROR, (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
    errmsg("%s must be at least twice %s",
        GUC_NAME("max_wal_size"),
        GUC_NAME("wal_segment_size"))));

Thoughts?

======
Kind Regards,
Peter Smith.
Fujitsu Australia