Re: Online system & transactions

Hello,

> You probably should look at the documentation for this.
>
> <http://www.postgresql.org/docs/current/interactive/sql-begin.html>
>
> PostgreSQL supports _exactly_ this notion, in exactly the way you
> describe.
But this is normal 'transaction' - and I didn't find way, how can I 'store'
transaction to disc storage and 'reopen' later. So, begin/commin works
within ONE connection and doesn't help in my general problem. Or is there
some way to do that with normal transactions ?

My problem is that related data changes are done in 'longer' time - e.g.
hour or so (it take hour to change all datas together) and within various
database connections.

Thx
Best regards,
Lada 'Ray' Lostak
Unreal64 Develop group
http://www.orcave.com
http://www.unreal64.net

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----- Original Message -----
From: "Chris Browne" <cbbrowne(at)acm(dot)org>
To: <pgsql-general(at)postgresql(dot)org>
Sent: Monday, October 18, 2004 7:22 PM
Subject: Re: [GENERAL] Online system & transactions

> ray(at)unreal64(dot)net ("Lada 'Ray' Lostak") writes:
> > Imagine some online system, based on PgSql. There are 'many' parts
which
> > depends on each other. I will give small example, but instead of simple
> > table imagine changing tenths various tables (editing). So, 'change
table A'
> > can be work for hours.
> >
> > There are tables tableA and tableB. Changes are made by thin client.
If
> > you change tableA, you have to also change tableB to 'finish' operation.
> > Between starting changing tableA until tableB is finished, data are 'not
> > valid'. Record may be changes, deleted, inserted, whatever.
> >
> > Is there any simple way, how to create 'transactions' over database
> > connections ? These relations are really complex in real live and
doesn't
> > fit table foundaries, so, it is basically not realistic to make it on
> > application layer and need to be done somehow on DB layer....
> >
> > The best solution should be possibility to 'begin' transaction,
'store'
> > somehow on server, and next time, instead of begin new transaction
return to
> > stored one. Transactions solves all these problems, but they don't work
> > across various/multiple connections....
> >
> > Any ideas/references please ?
>
> You probably should look at the documentation for this.
>
> <http://www.postgresql.org/docs/current/interactive/sql-begin.html>
>
> PostgreSQL supports _exactly_ this notion, in exactly the way you
> describe.
>
> If you need to have multiple transactions active at once, you will
> just need to establish multiple connections.
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