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Re: [PATCHES] Non-colliding auto generated names

From: Rod Taylor <rbt(at)rbt(dot)ca>
To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
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 19:47:04
Message-ID: 1046893624.19527.59.camel@jester (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
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

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