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Re: [HACKERS] Continue transactions after errors in psql

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Andrew Dunstan <andrew(at)dunslane(dot)net>,Richard Huxton <dev(at)archonet(dot)com>, Michael Paesold <mpaesold(at)gmx(dot)at>,Greg Sabino Mullane <greg(at)turnstep(dot)com>,pgsql-hackers(at)postgresql(dot)org, pgsql-patches(at)postgresql(dot)org
Subject: Re: [HACKERS] Continue transactions after errors in psql
Date: 2005-04-27 17:37:38
Message-ID: 200504271737.j3RHbcH23405@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-patches
Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Tom Lane wrote:
> >> Well, that's just a matter of choosing good (ie short) names for the
> >> backslash commands.  I was trying to be clear rather than proposing
> >> names I would actually want to use ;-).  Any suggestions?
> 
> > Well, if we allowed ON_ERROR_ROLLBACK to work in non-interactive
> > sessions we could just do:
> 
> > 	\set ON_ERROR_ROLLBACK on
> > 	DROP TABLE foo;
> > 	\set ON_ERROR_ROLLBACK off
> 
> That isn't the same thing at all.  The syntax I was proposing allows the
> script writer to define a savepoint covering multiple statements,
> whereas the above does not.

Well, it fits the use case posted, that is to conditionally roll back a
_single_ failed query.  I don't see the need to add a new
infrastructure/command unless people have a use case for rolling back a
group of statements on failure.  I have no seen such a description yet.

-- 
  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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