Re: [PATCHES] Non-colliding auto generated names

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Rod Taylor <rbt(at)rbt(dot)ca>
Cc: Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [PATCHES] Non-colliding auto generated names
Date: 2003-03-05 20:04:04
Message-ID: 200303052004.h25K44U27228@candle.pha.pa.us
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers pgsql-patches


Yes, our sequence name/column linkage should be much more automatic than
it is now, and if we do that, we can start to think about sequence name
collision avoidance.

---------------------------------------------------------------------------

Rod Taylor wrote:
-- Start of PGP signed section.
> On Wed, 2003-03-05 at 14:37, Bruce Momjian wrote:
> > Interesting idea. The bigger problem is that apps who use the sequence
> > name also would have problems running after the restore. Seems we need
> > column.nextval() so you can increment the sequence without knowing the
> > sequence name, just the column name. Of course, this related to this
> > TODO item:
> >
> > * Have sequence dependency track use of DEFAULT sequences,
> > seqname.nextval
>
> 200N spec proposes 'NEXT VALUE FOR <sequence>'.
>
> Tom will shoot me if I submit that though (VALUE as a keyword again). I
> suppose one could make it a variable, and confirm it's value is VALUE?
>
> Other than that it should be a fairly simple task.
>
>
> Anyway, once again we could extend to include:
>
> NEXT VALUE ON table(column)?
>
>
> An application that was simply interested in the next value of a table
> column could simply evaluate the default value -- which should be easily
> retrievable and more portable in most interfaces (jdbc, odbc, etc.).
>
> --
> Rod Taylor <rbt(at)rbt(dot)ca>
>
> PGP Key: http://www.rbt.ca/rbtpub.asc
-- End of PGP section, PGP failed!

--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073

In response to

Browse pgsql-hackers by date

  From Date Subject
Next Message mlw 2003-03-05 20:05:03 Re: Best setup for RAM drive
Previous Message Rod Taylor 2003-03-05 19:47:04 Re: [PATCHES] Non-colliding auto generated names

Browse pgsql-patches by date

  From Date Subject
Next Message Tom Lane 2003-03-05 21:53:20 Re: [PATCHES] Non-colliding auto generated names
Previous Message Rod Taylor 2003-03-05 19:47:04 Re: [PATCHES] Non-colliding auto generated names