Re: pg14 psql broke \d datname.nspname.relname

> On Mar 22, 2022, at 11:04 AM, Robert Haas <robertmhaas@gmail.com> wrote:
> 
> This patch adds three new arguments to processSQLNamePattern() and
> documents one of them. It adds three new parameters to
> patternToSQLRegex() as well, and documents none of them.

This next patch adds the missing comments.

> I think that
> the text of the comment might need some updating too, in particular
> the sentence "Additional dots in the name portion are not treated as
> special."

Changed. 

> There are no comments explaining the left_is_literal stuff. It appears
> that your intention here is that if the pattern string supplied by the
> user contains any of *?|+()[]{}.^\ not surrounded by double-quotes, we
> signal the caller. Some callers then use this to issue a complaint
> that the database name must be a literal. To me, this behavior doesn't
> really make sense. If something is a literal, that means we're not
> going to interpret the special characters that it contains. Here, we
> are interpreting the special characters just so we can complain that
> they exist. It seems to me that a simpler solution would be to not
> interpret them at all. I attach a patch showing what I mean by that.
> It just rips out the dbname_is_literal stuff in favor of doing nothing
> at all. To put the whole thing another way, if the user types "\d
> }.public.ft", your code wants to complain about the fact that the user
> is trying to use regular expression characters in a place where they
> are not allowed to do that. I argue that we should instead just be
> comparing "}" against the database name and see whether it happens to
> match.

I think your change is fine, so I've rolled it into this next patch.