FreeTDS Development Group

["Frediano Ziglio" <freddy77 AT gmail.com>]

2007/7/10, Luke Benstead <kazade AT gmail.com>:
> I've managed to work out exactly when it crashes. If you select a text
> field
> that is blank (i.e not NULL but empty) it crashes, here is the minimal
> python code:
>
> import pyodbc
>
> if __name__ == '__main__':
>    strSQL="""
> SELECT BlankField FROM SomeTable
>    """
>    cnxn = pyodbc.connect
> ('DRIVER={FreeTDS};SERVERNAME=server;DATABASE=db;UID=user;PWD=password')
>    cursor = cnxn.cursor()
>    cursor.execute(strSQL)
>    print cursor.fetchall()
>
> Hope that helps.
>
> Luke.



Ok, I understand the problem. When text is empty SQL_NO_DATA is returned and
string is not null-terminated. On the first call SQLGetData should return
SQL_SUCCESS instead. Note that pyODBC should check SQLGetData results.
Currently I'm attempting a course at Milano so I'm not able to do a
patch for this problem... expect a patch for next week... if I don't find an
alternate way before...

freddy77