[freetds] FreeTDS and MSSQL

Venkat Lak v_lak at yahoo.com
Sun Apr 20 22:28:00 EDT 2008


Hi
   
  Thanks for the quick reply.
   
  I think the server is not rejecting it, as the same query works
  fine in MS Query Analyzer. Also the log does not have an
  'ERROR' marker - the last marker is:
   
  06:50:21.015 3312 (token.c:536):processing result tokens.  marker is  fd(DONE)
   
  And soon after the query is sent, it returns with failure:
   
  06:50:21.015 3312 (util.c:157):Changed query state from QUERYING to PENDING
06:50:21.015 3312 (net.c:743):Sending packet
0000 01 01 00 7a 00 00 00 00-73 65 6c 65 63 74 20 74 |...z.... select t|
0010 72 61 6e 73 61 63 74 69-6f 6e 5f 69 64 20 66 72 |ransacti on_id fr|
0020 6f 6d 20 56 54 41 5f 54-52 41 4e 53 41 43 54 49 |om VTA_T RANSACTI|
0030 4f 4e 44 45 54 41 49 4c-53 20 77 68 65 72 65 20 |ONDETAIL S where |
0040 74 72 61 6e 73 61 63 74-69 6f 6e 5f 69 64 20 3d |transact ion_id =|
0050 27 31 35 39 36 33 63 38-35 2d 30 39 66 63 2d 34 |'15963c8 5-09fc-4|
0060 63 34 66 2d 39 33 61 62-2d 61 31 32 34 32 61 63 |c4f-93ab -a1242ac|
0070 35 65 61 63 34 2d 31 30-27 20                   |5eac4-10 ' |
  06:50:21.015 3312 (dblib.c:4297):dbsqlok(010B7BC0)
06:50:22.015 3312 (net.c:363):error: select(2) returned 0x2726, "Unknown error"
06:50:22.015 3312 (util.c:328):tdserror(010B7A08, 010B8340, 20004, 10022)
06:50:22.015 3312 (dblib.c:7583):dbperror(010B7BC0, 20004, 0)
06:50:22.015 3312 (dblib.c:7646):"Read from the server failed", client returns 2 (INT_CANCEL)
06:50:22.015 3312 (util.c:364):tdserror: client library returned TDS_INT_CANCEL(2)
06:50:22.015 3312 (util.c:385):tdserror: returning TDS_INT_CANCEL(2)
06:50:22.015 3312 (util.c:157):Changed query state from PENDING to DEAD
   
  And, I am using FreeTDS within a PHP application. My client is 
  a Windows XP machine and so I am using this windows
  implmentation of FreeTDS:
   
  http://kromann.info/php5_1-Release_TS/php_dblib.dll
   
  and the version I mentioned was from the log file:
   
  06:50:20.671 3312 (log.c:190):Starting log file for FreeTDS 0.63
 on 2008-04-21 06:50:20 with debug flags 0xffff.
   
  Is there a different implementation ? If so please let me
  know.
   
  Thanks again,
  Venkat
  

"James K. Lowden" <jklowden at freetds.org> wrote:
  Venkat Lak wrote:
> I use FreeTDS 0.63 to access a MSSQL server 2000 (version 
> 8.00.2039). It connects fine and my queries work except for
> one - when I use a GUID string (a varchar column) in the
> where clause it fails:
> 
> select * from table where
> tid='bb8c5fe8-5e25-4181-8c3f-9ed12b6f9eb7-ed';
> 
> However, when I do:
> 
> select * from table where
> tid>='bb8c5fe8-5e25-4181-8c3f-9ed12b6f9eb7-ed';
> 
> it works ! It also works for '>','<','<=' and '<>' comparison
> operators - just that '=' fails. In the tds dump I get:
> 
> dblib.c:4297:dbsqlok(010B7BC0)
> net.c:363:error: select(2) returned 0x2726, "Unknown error"
> util.c:328:tdserror(010B7A08, 010B8340, 20004, 10022)
> dblib.c:7583:dbperror(010B7BC0, 20004, 0)

Um, no. tdserror() was introduced in January 2007, long after 0.63 was
released. 

FreeTDS doesn't interpret SQL. The server is rejecting it, and it's very
likely that it returns a message before it closes the connection. Look
for an error token in the TDSDUMP log:

$ grep marker dump | grep ERROR
token.c:525:processing result tokens. marker is aa(ERROR)
token.c:105:tds_process_default_tokens() marker is aa(ERROR)

The message text will be nearby. 

HTH. 

--jkl
_______________________________________________
FreeTDS mailing list
FreeTDS at lists.ibiblio.org
http://lists.ibiblio.org/mailman/listinfo/freetds


       
---------------------------------
Be a better friend, newshound, and know-it-all with Yahoo! Mobile.  Try it now.



More information about the FreeTDS mailing list