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Transactions and libpq
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* Transactions and libpq
@ 2006-08-21 23:11 osxdeveloper@mac.com
  2006-08-21 23:28 ` Re: Transactions and libpq Michael Fuhr <mike@fuhr.org>
  0 siblings, 1 reply; 2+ messages in thread

From: osxdeveloper@mac.com @ 2006-08-21 23:11 UTC (permalink / raw)
  To: pgsql-interfaces


Hi!

I am writing an application using the libqpsql client lib.
What I like to do now, is to control transaction behavior
from within my application.
But the following happens:
When I try to open a transaction libpg prints
"WARNING:  there is already a transaction in progress"
to stdout.
The question for me is - why??
I searched Google and found some confusing things about serverside
auto-commit - but this is removed at last in Postgres 8.0.

Can somebody lighten my about the reason for this problem?

Thanks for any help!

Regards,
Ralf Hasemann




^ permalink  raw  reply  [nested|flat] 2+ messages in thread

* Re: Transactions and libpq
  2006-08-21 23:11 Transactions and libpq osxdeveloper@mac.com
@ 2006-08-21 23:28 ` Michael Fuhr <mike@fuhr.org>
  0 siblings, 0 replies; 2+ messages in thread

From: Michael Fuhr @ 2006-08-21 23:28 UTC (permalink / raw)
  To: osxdeveloper@mac.com; +Cc: pgsql-interfaces

On Tue, Aug 22, 2006 at 01:11:33AM +0200, osxdeveloper@mac.com wrote:
> I am writing an application using the libqpsql client lib.

Do you mean libpq?  Are you coding in C?

> What I like to do now, is to control transaction behavior
> from within my application.
> But the following happens:
> When I try to open a transaction libpg prints
> "WARNING:  there is already a transaction in progress"
> to stdout.
> The question for me is - why??

As the error says: a transaction had already been started when the
application tried to start another one.  Can you post a simple but
complete program that demonstrates this behavior when you think it
shouldn't?  You could also enable statement logging on the server
to see everything the application is executing.

> I searched Google and found some confusing things about serverside
> auto-commit - but this is removed at last in Postgres 8.0.

Server-side autocommit existed only in 7.3.  What version of libpq
are you using, and what version of the server?

-- 
Michael Fuhr



^ permalink  raw  reply  [nested|flat] 2+ messages in thread


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