Re: [INTERFACES] Transaction: Begin, Lock

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От Margarita Barvinok
Тема Re: [INTERFACES] Transaction: Begin, Lock
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Msg-id Pine.SOL.4.10.9909150900280.16800-100000@joust.rs.itd.umich.edu
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Ответ на Re: [INTERFACES] Transaction: Begin, Lock  (Michael Meskes <meskes@postgreSQL.org>)
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Michael, thank you very much.
I didn't know this.

-Margarita

On Tue, 14 Sep 1999, Michael Meskes wrote:

> > 1. Why i get the following message when I run this code?
> > NOTICE: BeginTransactionBlock and not in default state
> 
> I take it you did not use 'ecpg -t' did you? The normal situation is that
> ecpg creates a auto-transaction mode, i.e. a transaction is started
> automatically. You only need to issue a COMMIT once you finish your
> transaction resp. a ROLLBACK if you want to cancel it. 
> 
> So you tell the backend to start a transaction while already inside a
> transaction. And that cannot work. 
> 
> You can either just remove the BEGIN WORK statement or you always give
> option '-t' to ecpg.
> 
> > 2. How should I lock the table phonebook during this transaction?
> 
> Why do you need that? You do not need an explicit lock for the delete to
> work.
> 
> Michael
> -- 
> Michael Meskes                         | Go SF 49ers!
> Th.-Heuss-Str. 61, D-41812 Erkelenz    | Go Rhein Fire!
> Tel.: (+49) 2431/72651                 | Use Debian GNU/Linux!
> Email: Michael@Fam-Meskes.De           | Use PostgreSQL!
> 

-------------------------------
Margarita Barvinok
System Administrator II
University of Michigan
Department of Biology
-------------------------------



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