Re: Nested xacts: looking for testers and review

From: Stephan Szabo <sszabo(at)megazone(dot)bigpanda(dot)com>
To: Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl>
Cc: Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Nested xacts: looking for testers and review
Date: 2004-05-29 00:43:41
Message-ID: 20040528173910.P98327@megazone.bigpanda.com
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On Wed, 26 May 2004, Alvaro Herrera wrote:

> I have tested it and it passes all regression tests (including ones I
> added), plus some more tests I threw at it mainly for concurrency.
> Everything behaves as expected. At this time I'd like to have it
> reviewed by the critic eye of the committers, and tested by whoever
> would be using it.
>
> I'm open for comments and suggestions and general input. Thank you.

I unfortunately didn't really follow the discussions in the past (sorry :(
), but are the transaction state modifying statements done in a
subtransaction supposed to live beyond subtransaction rollback?

For example,
sszabo=# begin;
BEGIN
sszabo=# begin;
BEGIN
sszabo=# set transaction read only;
SET
sszabo=# select * from a;
a
---
6
(1 row)

sszabo=# rollback;
ROLLBACK
sszabo=# update a set a=6;
ERROR: transaction is read-only

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