FreeTDS Development Group

[Trygve Liland <Trygve.Liland AT visma.no>]

Thanks for feedback. 
We tried to downgrade to 7.0, but same result...
The project is run by a governmental specialist directorate in Norway, and 
I'm just trying to help out with the C code issues in my spare time :-)
I've instructed the programmer, to try the unit tests. 
Sorry we didn't try them first.

What I don't understand is that the text pointer is null.
This code should test for null values:
If (txtptr = dbtxptr(pqq->DbProc, 1)) == NULL) return;
And I dblib.c:
CHECK_NULP(textptr, "dbwritetext", 3, FAIL);
So I suspect this code I dblib.c:
dbconvert(dbproc, SYBBINARY, (BYTE *) textptr, textptrlen, SYBCHAR, (BYTE *) 
textptr_string, -1);
My textpointer is:
DBBINARY   txtPointer[DBTXPLEN]

I'll report again when the unit tests have been run.

Trygve

-----Original Message-----
From: freetds-bounces AT lists.ibiblio.org 
[mailto:freetds-bounces AT lists.ibiblio.org] On Behalf Of Frediano Ziglio
Sent: 25. mai 2012 16:40
To: FreeTDS Development Group
Subject: Re: [freetds] Using dbwritetext against Ms-Sql

2012/5/25 James K. Lowden <jklowden AT freetds.org>:
> On Fri, 25 May 2012 12:15:33 +0000
> Trygve Liland <Trygve.Liland AT visma.no> wrote:
>
>> The problem is that we are getting
>> tds_put_string: "writetext bulk IMAGECOLTAB.IMAGECOL
>> 0x00000000000000000000000000000000 timestamp = 0x0000000000000000 
>> with log" Invalid text, ntext, or image pointer value 
>> 0x00000000000000000000000000000000.
>>
>> Any idea on what we are doing wrong? I have checked code that we have 
>> in another program where we used dblib against Ms-Sqlserver, and I 
>> see more or less the same code.
>
> Those zeros are a problem, no doubt about it.
>
> Do the db-lib unit tests t0013.c and t0014.c work with your server?
> That would verify that dbwritetext() works with the TDS version you're 
> using.
>
> The log doesn't record the value of the textptr returned by dbtxtptr.
> If the server is sending a NULL textptr, see if that changes using TDS 
> 7.1.  If not, if you're receiving a good textptr from the server, you 
> need to find out why you're sending a NULL textptr.
>
> Hälsingar,
>
> --jkl

Try also to downgrade to 7.0 protocol.

MS decided to not return textptr with data even they still support TEXTPTR 
function on T-SQL, or better, they decide to always return an invalid 
textptr! I don't remember if was with 7.1 or 7.2... I don't really understand 
why...

Frediano
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