FreeTDS Development Group

["ZIGLIO, Frediano, VF-IT" <Frediano.Ziglio AT vodafone.com>]

>From TODO

Bug? ML 2007-05-28, odd datatype and packet size
        "unknown marker error with Sybase ASE 15.0, character
encoding-related"
        type collision between Sybase and Microsoft implementations,
same
        value but different variable size

well... this is a big problem!!

Sybase and Microsoft use different enumerations for "column type".
We have a collision, that is XSYBCHAR type have the save value of
TDS_LONGCHAR (or whatever) however XSYBCHAR have a length of 2 bytes
while TDS_LONGCHAR have a length of 4 bytes... this cause the unknown
marker error :(

Currently I tried a small patch (see attachment). As you can see it's
not that short... I cannot test it cause I currently don't have a Sybase
15.0 set up to test :( For the long term perhaps the better way is to
use another enumerations for column_type that should threat some sort of
"libTDS types" instead of a mixed enumerations and should test correctly
if the server is sending a valid type (that is a Sybase server should
not send a column type that only Microsoft support...)

freddy77

Attachment: vedi.diff.gz
Description: vedi.diff.gz