Re: pgbench: supports PGDATABASE / warning about -d

On Mon, Feb 22, 2021 at 11:39:46AM +0000, PG Doc comments form wrote:
> 1) pgbench has always supported the PGDATABASE env variable, but it is not
> listed along PGHOST/PGPORT & PGUSER  in 
> https://www.postgresql.org/docs/13/pgbench.html#id-1.9.4.10.8.
> PGDATABASE is listed in the pages of the psql/pg_dump/createdb...
> utilities

Yeah, let's fix that.  Adding only PGDATABASE to the list of
environment variables supported does not look enough to me, so I
propose the simple patch attached to clarify what happens to dbname in
more details.

> 2) In "Common options", it would be useful to add a warning that "-d means
> --debug and does NOT define the database, contrary to most other PostgreSQL
> utilities". 
> (It seems to work and the consequence is a flood of SQL orders on the
> screen.)

I don't agree with this part.
--
Michael