Re: PSQL schema "describe" \dn is not escaping quotes - Mailing list pgsql-hackers

From Peter Smith
Subject Re: PSQL schema "describe" \dn is not escaping quotes
Date
Msg-id CAHut+PskWGxVkE1FeUJEQv7CfHtvvqh7RcvKzO+nL5TQuaND3w@mail.gmail.com
Whole thread
In response to Re: PSQL schema "describe" \dn is not escaping quotes  (Jim Jones <jim.jones@uni-muenster.de>)
Responses Re: Set notice receiver before libpq connection startup
List pgsql-hackers
Thanks to both for the reviews.

On Tue, Jul 28, 2026 at 11:18 PM Jim Jones <jim.jones@uni-muenster.de> wrote:
>
> Hi Peter & Steven
>
> On 28/07/2026 10:19, Steven Niu wrote:
> >   1. Indentation
> >
> >          if (!validateSQLNamePattern(...))
> >          goto error_return;          // should be indented one more tab

Now I have run pgindent.

> >
> >   2. The new validateSQLNamePattern() call duplicates validation that
> >      already happened.
> >
> >        The validateSQLNamePattern() has been called before your change. Since only the escaping/query-building side
effectis actually 
> >        needed here. You can call the lower-level processSQLNamePattern() directly and doesn't check its return
value,because no additional validation is needed: 
> >
> >          processSQLNamePattern(pset.db, &buf, pattern, false, false,
> >                                               NULL, "n.nspname", NULL,
> >                                               NULL, NULL, NULL);

Done. Thanks for pointing me to this lower function.

>
>
> I'm also wondering if we should use appendPQExpBufferStr instead of
> appendPQExpBuffer here, since there are no format strings -- just to be
> consistent with the other queries in the same file.
>
> appendPQExpBuffer(&buf,
>   "SELECT pubname \n"
>   "FROM pg_catalog.pg_publication p\n"
>   "     JOIN pg_catalog.pg_publication_namespace pn ON p.oid = pn.pnpubid\n"
>   "     JOIN pg_catalog.pg_namespace n ON n.oid = pn.pnnspid \n");
> ...
> appendPQExpBuffer(&buf, "ORDER BY 1;");

Done. Oops.

~~~

PSA patch v2 to address all of the above.

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

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