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  • From: Steve Willer <willer AT novator.com>
  • To: TDS Development Group <freetds AT franklin.oit.unc.edu>
  • Subject: Re: Status of placeholder support?
  • Date: Mon, 30 Jul 2001 18:38:56 -0400 (EDT)



On Mon, 30 Jul 2001, Brian Bruns wrote:

> The initial placeholder support is TDS 5.0 only (which means Sybase
> only). I'm hoping to add support for TDS 7.0 if someone sends me some
> code/network traces of it.

TDS5 is what I'm interested in. Can you give me an idea of how far along
it is? I'm currently experiencing segfaults while trying to log in using
DBD::Sybase and the latest CVS code (on Linux), so I haven't been able to
try it out myself yet.


> The biggest problem is that DBD::Sybase relies on ctlib (and thus the TDS
> protocol) for a description of the placeholder values, integer or
> character and that sort of thing. So, it really can't be done strictly on
> the client side, it needs support from the protocol. TDS 4.2 had no
> placeholder support, TDS 5.0 added it, TDS 7 probably did too, but
> incompatibly I'm guessing.
>
> I've been trying to figure out how best to handle the overloading of the
> ct_results and other functions to deal with placeholders in a graceful
> manner. That is the biggest hold up for finishing off the TDS 5 stuff.
>
> Hope this made sense,
>
> Brian
>
> On Mon, 30 Jul 2001, Steve Willer wrote:
>
> >
> > I noticed that in the latest CVS, there's some initial development of
> > placeholder support. I was wondering: how far along is it, and how time do
> > you think until it's usable?
> >
> > I've come across a sudden urgent requirement for deployment of FreeTDS,
> > and given that our queries already use placeholders, having placeholders
> > available would make my life so very much simpler...
> >
>
>
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