Skip site navigation (1) Skip section navigation (2)

Re: Question about inheritance

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Christopher Kings-Lynne" <chriskl(at)familyhealth(dot)com(dot)au>
Cc: "Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Question about inheritance
Date: 2001-06-05 02:07:42
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
"Christopher Kings-Lynne" <chriskl(at)familyhealth(dot)com(dot)au> writes:
> Am I misunderstanding how the mechanism works, or is this a big, not easily
> solved, problem?

The latter.  Check the list archives for previous debates about this.
It's not real clear whether an inherited primary key should be expected
to be unique across the whole inheritance tree, or only unique per-table
(IIRC, plausible examples have been advanced for each case).  If we want
uniqueness across multiple tables, it'll take considerable work to
create an index mechanism that'd enforce it.

			regards, tom lane

In response to

pgsql-hackers by date

Next:From: bpalmerDate: 2001-06-05 02:16:34
Subject: Re: Mirrors not tracking main ftp site?
Previous:From: Tom LaneDate: 2001-06-05 01:56:21
Subject: Mirrors not tracking main ftp site?

Privacy Policy | About PostgreSQL
Copyright © 1996-2018 The PostgreSQL Global Development Group