[freetds] output parameters and "unknown marker"
Lowden, James K
LowdenJK at bernstein.com
Thu Jan 6 15:21:17 EST 2005
Updated http://www.freetds.org/tds.html#172.
Thanks, Freddy.
--jkl
-----Original Message-----
From: freetds-bounces at lists.ibiblio.org
[mailto:freetds-bounces at lists.ibiblio.org] On Behalf Of Frediano Ziglio
Sent: Thursday, January 06, 2005 1:19 PM
To: FreeTDS Development Group
Subject: RE: [freetds] output parameters and "unknown marker"
Il giorno gio, 06-01-2005 alle 12:00 -0500, Lowden, James K ha scritto:
> > From: Thompson, Bill D (London)
> > Sent: Thursday, January 06, 2005 11:33 AM
> >
> > certainly our code seems not to handle the data that's coming our
way...
> > I think the issue might be with using TDS 8.0 rather than 7.0 - I
didn't know there was a difference in the AC(param) token between these
two versions but there does appear to be...
>
> Bill,
>
> Could it be that datatype 3D (datetime) should be treated as variable
length?
>
> Here's my analysis of the packet, based on
http://www.freetds.org/tds.html#responses:
>
> Return Status:
> 79 00 00 00 00
> (zero)
>
>
> Output Parameter 1:
> ac 1100 05 4000 6c00 6100 7300 7400 01 3d 00 00 00 3d 00
> (5-char name) (5 bytes unk.) ^^ length?
>
>
> Output Parameter 2:
> ac 1100 05 4000 7000 7200 6500 7600 01 3d 00 00 00 3d 00
> (5-char name) (5 bytes unk.) ^^ length?
>
> Process Done:
> fe 0000 e000 01000000
> (no more results, row count not valid)
>
> I imagine the "unknown" bytes are collation data.
>
>
No unknown should be
01 flags
3d 00 00 00 usertype
3d type
Usually under mssql bit 0 on status means nullable. It seems that in
some condition mssql return for nullable datetime using not nullable
type and nullable flag. As you can see parameter in input are passed
using not nullable type, perhaps this cause the problem.
Declaration of pdtGetDealRevalDates would help.
freddy77
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