Обсуждение: Username with a hyphen character (grant failing?)

    What's the scoop with username constraints?  I setup and
created a user with a '-' character in the middle (worked).  When I
tried to grant the new user some privs, grant choked on the '-' w/ a
parse error.

foo=# GRANT SELECT ON test TO www-foo;
ERROR:  parser: parse error at or near "-"
foo=# update pg_shadow set usename = 'www_foo' where usename = 'www-foo';
UPDATE 1
foo=# GRANT SELECT ON maildir TO www_foo;
CHANGE

    Did I miss a page someplace that said I couldn't use a '-' in
a username, or is this a bug? -sc


--
Sean Chittenden

Sean Chittenden <sean-pgsql-general@chittenden.org> writes:
>     What's the scoop with username constraints?  I setup and
> created a user with a '-' character in the middle (worked).

Double quotes are your friend when dealing with names that don't
follow the usual constraints for identifiers.

            regards, tom lane

> >     What's the scoop with username constraints?  I setup and
> > created a user with a '-' character in the middle (worked).
>
> Double quotes are your friend when dealing with names that don't
> follow the usual constraints for identifiers.

    Are single quotes treated differently than double?  I tried
single, but didn't have any luck...  -sc

--
Sean Chittenden

Sean Chittenden <sean-pgsql-general@chittenden.org> writes:

> > >     What's the scoop with username constraints?  I setup and
> > > created a user with a '-' character in the middle (worked).
> >
> > Double quotes are your friend when dealing with names that don't
> > follow the usual constraints for identifiers.
>
>     Are single quotes treated differently than double?  I tried
> single, but didn't have any luck...  -sc

Yes.  Single quotes are for strings; double quotes are for
identifiers.

-Doug
--
The rain man gave me two cures; he said jump right in,
The first was Texas medicine--the second was just railroad gin,
And like a fool I mixed them, and it strangled up my mind,
Now people just get uglier, and I got no sense of time...          --Dylan

On Fri, May 25, 2001 at 11:38:50AM -0400, Doug McNaught wrote:
> Sean Chittenden <sean-pgsql-general@chittenden.org> writes:
>
> > > >     What's the scoop with username constraints?  I setup and
> > > > created a user with a '-' character in the middle (worked).
> > >
> > > Double quotes are your friend when dealing with names that don't
> > > follow the usual constraints for identifiers.
> >
> >     Are single quotes treated differently than double?  I tried
> > single, but didn't have any luck...  -sc
>
> Yes.  Single quotes are for strings; double quotes are for
> identifiers.

meaning, for example:

    create table info (
        "this field" text,
        "that-field" integer,
        "it's alarming" serial
    );
    insert into info("this-field")values('here\'s the contents for that column in the table');

or

    grant select on "table named with spaces" to "some-oddball-user";

    select 'this is a string value, not a field or table name';

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