Re: pg_dumpall --exclude-database option

> Among other use cases, this is useful where a database name is visible but
> the database is not dumpable by the user. Examples of this occur in some
> managed Postgres services.

This looks like a reasonable feature.

> I will add this to the September CF.

My 0.02€:

Patch applies cleanly, compiles, and works for me.

A question: would it makes sense to have a symmetrical
--include-database=PATTERN option as well?

Somehow the option does not make much sense when under -g/-r/-t... maybe
it should complain, like it does when the others are used together?

ISTM that it would have been better to issue just one query with an OR
list, but that would require to extend "processSQLNamePattern" a little
bit. Not sure whether it is worth it.

Function "database_excluded": I'd suggest to consider reusing the
"simple_string_list_member" function instead of reimplementing it in a
special case.

XML doc: "--exclude-database=dbname", ISTM that
"--exclude-database=pattern" would be closer to what it is? "Multiple
database can be matched by writing multiple switches". Sure, but it can
also be done with a pattern. The documentation seems to assume that the
argument is one database name, and then changes this afterwards. I'd
suggest to start by saying that a pattern like psql is expected, and then
proceed to simply tell that the option can be repeated, instead of
implying that it is a dbname and then telling that it is a pattern.

The simple list is not freed. Ok, it seems to be part of the design of the
data structure.

--
Fabien.