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Re: Constraint names using 'user namespace'?

From: Philip Warner <pjw(at)rhyme(dot)com(dot)au>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Hackers List <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Constraint names using 'user namespace'?
Date: 2000-11-28 05:43:22
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
At 00:24 28/11/00 -0500, Tom Lane wrote:
>Philip Warner <pjw(at)rhyme(dot)com(dot)au> writes:
>> Just noticed this:
>> pjw=# create table pk1(f1 integer, constraint zzz primary key(f1));
>> NOTICE:  CREATE TABLE/PRIMARY KEY will create implicit index 'zzz' for
>> table 'pk1'
>> pjw=# create table zzz(f1 integer);
>> ERROR:  Relation 'zzz' already exists
>> Is there a good reason why the automatically created items do not have a
>> 'pg_' in front of their names?
>Not a good idea.  I think it should probably be pk1_zzz in this case.

That would at least be consistent, but it's still using 'user namespace'
for system-related items, which seems like a bad practice if it can be
avoided. I don't mind a longer name, if that is your objection:
pg_constraint_pk1_zzz or some such.

>If we do either, it will break the recently submitted pg_dump patch that

Not too hard to fix.

>uses the index name as the constraint name.  I thought that patch was
>wrongheaded anyway, and would recommend reversing it...

I wasn't too keen on it, but could not come up with any good arguments
against it. We need a unified approach to constraints, but in the mean time
it seems OK. Do you have any more definite objections?

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