FreeTDS Development Group

[Frediano Ziglio <freddy77 AT gmail.com>]

2012/12/31 Ian Lister <freetds-list AT lister.dnsalias.net>:
> Hi,
>
> I was running into a problem due to FreeTDS not supporting Sybase's 
> unsigned integer types (SYBUINT1/2/4/8). It was manifested as cs_convert 
> failing to convert other types (such as SYBNUMERIC) to those unsigned 
> types, and reporting:
>
> cs_convert: cslib user api layer: external error: Conversion between 108 
> and -1 datatypes is not supported
>
> I have attached a patch that addresses the issue for me, in the hope that 
> it might be useful for others. I tried to make it fairly complete in the 
> areas of the code that I touched, but I was only following my nose so have 
> quite likely overlooked other parts of the code (including test cases) that 
> are also lacking SYBUINTn support. YMMV etc.
>
> Ian
>

The big doubt I have with this patch is that it could let you use
SYBUINT types even if server is not accepting that types... probably
passing a tds variable to cs_server_type could help.

Frediano