Re: Re: PostgreSQL and PHP persistent connections - Mailing list pgsql-interfaces

From Bruce Momjian
Subject Re: Re: PostgreSQL and PHP persistent connections
Date
Msg-id 200102081418.JAA16051@candle.pha.pa.us
Whole thread Raw
In response to Re: PostgreSQL and PHP persistent connections  (Jan Wieck <janwieck@Yahoo.com>)
List pgsql-interfaces
> > > How is that an improvement?  It only changes the case in which you get
> > > a NOTICE from not-in-transaction to in-transaction ...
> >
> > Well, the most common case is that you are not in a transaction.
> 
>     Why   not   tracing  PQcmdStatus(result)  on  the  persistent
>     connection?  It  allways   returns   "BEGIN",   "COMMIT"   or
>     "ROLLBACK" for whatever you issued.
> 
>     Well,  it'll  not  catch the uncommon case that someone might
>     issue  multiple  queries   in   one   statements   (semicolon
>     separated). But that's IMHO bad practice anyway and the above
>     will avoid communication, context switching and eating up  of
>     XID's until we have silent rollback in 7.2.

It is the multi-command issue that prevented me from suggesting checking
the return status.  If they are leaving an open transaction after
disconnecting, they could be doing any crazy thing.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


pgsql-interfaces by date:

Previous
From: Jan Wieck
Date:
Subject: Re: PostgreSQL and PHP persistent connections
Next
From: Tom Lane
Date:
Subject: Re: Re: Re: Postgres and Oracle differences and questions