From: | Carlos Mennens <carlos(dot)mennens(at)gmail(dot)com> |
---|---|
To: | PostgreSQL <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: Rename or Re-Create Constraints? |
Date: | 2011-04-09 21:59:06 |
Message-ID: | BANLkTinO5fpQ0SQLnsUUf_9etdDqMxO+dg@mail.gmail.com |
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Thread: | |
Lists: | pgsql-general |
On Sat, Apr 9, 2011 at 12:58 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> ALTER INDEX accounts_pkey RENAME TO whatever
>
> On very old versions of PG you may have to spell that "ALTER TABLE"
> instead of "ALTER INDEX", but it's the same thing either way.
Thank you so much for clearing that up for me Tom! I just couldn't
find anything documented or do I understand SQL enough to work through
that w/o an example.
I read the PostgreSQL documentation all morning and just couldn't find
it. Also to make sure I did this correct, if I had an existing table
w/o a PRIMARY KEY index / constraint, is the following correct?
CREATE UNIQUE INDEX users_pkey ON public.users (id);
CREATE INDEX
I'm guessing that's how I generate a index / constraint on an existing
table when it was generated during the table creation SQL command,
right?
Is there a difference between an INDEX and a CONSTRAINT?
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