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From: Michael Peppler <mpeppler at peppler dot org>
Subject: Re: logging with Text/Image fields
Date: Jan 24 2002 10:10PM
Monty Charlton writes:
> It appears that using dbpreptext() and dbwritetext() allow you to turn
> logging on and off. I heard from someone that turning logging on can
> increase performance when selecting and inserting text & image fields. This,
> personally, sounds counter intuitive, but I figured it's worth trying.
I sincerly doubt that having logging turned on will speed up
inserts/updates. Logging has no effect for selecting the data, of course.
> I'm using ct_get_data() and ct_send_data() for my image & text work. Is it
> possible to turn logging on with either of these?
See the man page:
$ret = $dbh->ct_data_info($action, $colnum [, \%attr [,
When $action is CS_GET ct_data_info() retrieves a
CS_IODESC struct for column $colnum. The CS_IODESC
struct is stored internally in the $dbh, and
stores the text pointer, the total length and
whether logging should be turned on for updates.
The %attr hash can be used to set the total_txtlen
and log_on_update fields of the CS_IODESC by set-
ting the corresponding fields in the %attr param:
%attr = ( total_txtlen => 1024, log_on_update => 1 );
$dbh->ct_data_info(CS_SET, $colnum, \%attr);
Michael Peppler - Data Migrations Inc. - http://www.mbay.net/~mpeppler
firstname.lastname@example.org - email@example.com
International Sybase User Group - http://www.isug.com