Nested transaction - I am a bank ?? - Mailing list pgsql-general

From Thapliyal, Deepak
Subject Nested transaction - I am a bank ??
Date
Msg-id 1FE5193EE2768D478949FC0AFBFFC43B06EBDE11@mail-sd1.station.sony.com
Whole thread Raw
Responses Re: Nested transaction - I am a bank ??  ("Joshua D. Drake" <jd@commandprompt.com>)
Re: Nested transaction - I am a bank ??  (Richard Huxton <dev@archonet.com>)
Re: Nested transaction - I am a bank ??  ("Nigel J. Andrews" <nandrews@investsystems.co.uk>)
Re: Nested transaction - I am a bank ??  (David Garamond <lists@zara.6.isreserved.com>)
List pgsql-general
Hi,

Assume I have a bank app.. When customer withdraws $10 from his accouint I
have to do following
    --> update account_summary table [subtract $10 from his account]
    --> update account detail_table [with other transaction details]

Requirement:
    either both transactions should succeed or both transactions should
be rolled back in case of failure.

Question:
    if my first update succeeds and second fails (say due to space
errors .. I have inconsistancy ..

Per the thread below stored procedures/functions cannot have commits. I
assume that means that they will be implicitly commited ??

How do I approach this simple requirment using psql ?

Thx
Deep

-----Original Message-----
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of Richard Huxton
Sent: Tuesday, January 13, 2004 4:32 AM
To: Anton.Nikiforov@loteco.ru
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] Parse error help needed...


On Tuesday 13 January 2004 12:01, Anton.Nikiforov@loteco.ru wrote:
> RH> Remove the "commit" line - functions cannot define their own
> transactions RH> anyway.
> Do you know if it will be solved sometime? Or this is architecture
> dependend problem? I mean that transactions are rulez and very helpful
> rulez when working with large databases.

Nested transactions are on the todo list, but I don't know when they will
appear.

--
  Richard Huxton
  Archonet Ltd

---------------------------(end of broadcast)---------------------------
TIP 7: don't forget to increase your free space map settings

pgsql-general by date:

Previous
From: "Chris Ochs"
Date:
Subject: Re: sql insert function
Next
From: "scott.marlowe"
Date:
Subject: Re: Any real known bugs about wrong selects?