A suggestion about the usage manual of \d command

Hi,
I created a domain object named `numeric` using the following statement:
`CREATE DOMAIN numeric AS NUMERIC(12,2) DEFAULT 0 CHECK (VALUE >= 0);`
After executing this SQL, it indicated that the domain was created
successfully. However, when I executed `\dD` in psql, the created domain
could not be displayed.

The reason is that the name I used is the same as a built-in type (of
course, similar issues exist not only with domains). However, our manual
for the `\dD` command lacks relevant explanations, which can mislead users.
Users might think an object was successfully created, but the `\d` command
doesn't display it, which could make beginners doubt whether the object was
created successfully. I suggest adding necessary explanations to the `\d`
command's manual.

Best regards
Yuanchao Zhang