From: Tom Lane <tgl@sss.pgh.pa.us>
To: Japin Li <japinli@hotmail.com>
cc: bernaridho@outlook.co.id, pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #17111: Database created, cannot be created,
 but reported as inexist
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Comments: In-reply-to Japin Li <japinli@hotmail.com>
	message dated "Fri, 16 Jul 2021 18:50:57 +0800"
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Date: Fri, 16 Jul 2021 13:56:23 -0400
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Japin Li <japinli@hotmail.com> writes:
> Can we remove the code for compatibility with 7.2 or older?

I'm kind of inclined not to, because most other ways that you can
specify a database name for a connection also don't downcase.

$ psql Postgres
psql: error: connection to server on socket "/tmp/.s.PGSQL.5440" failed: F=
ATAL:  database "Postgres" does not exist

$ psql postgres
...
postgres=3D# \c "dbname=3DPostgres"
connection to server on socket "/tmp/.s.PGSQL.5440" failed: FATAL:  databa=
se "Postgres" does not exist
Previous connection kept

This largely stems from an ancient decision that we shouldn't
auto-downcase names coming from a program's command line.
The interaction of SQL and shell quoting conventions is messy
enough that specifying a non-lower-case database, user, etc name
would be pretty annoying if we did do that.

			regards, tom lane