From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Kevin Brown <kevin(at)sysexperts(dot)com> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: 7.4 Wishlist |
Date: | 2002-12-05 06:21:12 |
Message-ID: | 200212050621.gB56LCJ29961@candle.pha.pa.us |
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Lists: | pgsql-advocacy pgsql-general pgsql-hackers |
Kevin Brown wrote:
> Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au> wrote:
> > Hi guys,
> >
> > Just out of interest, if someone was going to pay you to hack on Postgres
> > for 6 months, what would you like to code for 7.4?
>
> Well, on top of the oft-requested replication support and savepoint
> support, I'd like to see UPDATE, er, updated to be able to make use of
> cursors.
I think this could be easily done by using the tid of the cursor row for
the update, assuming there is a clear tid for the SELECT. Jan has
talked about doing that.
> I'd also like to see (if this is even possible) a transaction
> isolation mode that would make it possible for multiple concurrent
> updates to the same row to happen without blocking each other (I
> imagine one way to make this possible would be for the last
> transaction to commit to be the one that "wins". Each transaction
> that commits gets its updates written so that other transactions that
> begin after they commit will see them, of course). Neither "read
> committed" nor "serialized" modes offer this. Don't know if it's
> possible, but it would be nice (such that a transaction sees the
> database as if it has it all to itself and doesn't block on
> updates)...
How would you do the update if you don't know of the transaction commits
or aborts?
--
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
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