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From: Tom Lane <tgl@sss.pgh.pa.us>
To: "David G. Johnston" <david.g.johnston@gmail.com>
cc: PostgreSQL Bug List <pgsql-bugs@lists.postgresql.org>
Subject: Re: LibPQ doesn't say host=* translates to localhost
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"David G. Johnston" <david.g.johnston@gmail.com> writes:
> The documentation [0] doesn't say this should work and general networkin=
g
> knowledge leads me to believe it wouldn't [1].

> PGHOST=3D'*' psql postgres
> psql (17beta1)

Seems to be an undocumented glibc-ism.  That works for me on RHEL8,
but not on macOS:

$ psql -h '*'
psql: error: could not translate host name "*" to address: nodename nor se=
rvname provided, or not known

The POSIX spec for getaddrinfo(3) doesn't suggest it should
work, either.

			regards, tom lane