External SQL functions exported by DLLs

We have a few rather advanced calculation routines
developed in C++. Currently we are using a Sybase ASA
database for our app. and these routines are accessible
by so called external functions exported by a DLL
(dynamic link library) that we wrote in C++. Sybase
supports this quite nicely.
The client app can call such routines by:
"select get_roof_angle() as angle from dummy;"
or
":angle = call get_roof_angle();"
Now we are checking if other databases can provide us
with similar abilities. So I just wonder if SQLServer/MSDE
supports the ability to call a routine exported by a
DLL? If yes, does anyone know the SQL syntax to declare
it in SQLServer/MSDE
Best regards
Peter Sullvan
hi Peter,
Peter Sullvan wrote:
> We have a few rather advanced calculation routines
> developed in C++. Currently we are using a Sybase ASA
> database for our app. and these routines are accessible
> by so called external functions exported by a DLL
> (dynamic link library) that we wrote in C++. Sybase
> supports this quite nicely.
> The client app can call such routines by:
> "select get_roof_angle() as angle from dummy;"
> or
> ":angle = call get_roof_angle();"
> Now we are checking if other databases can provide us
> with similar abilities. So I just wonder if SQLServer/MSDE
> supports the ability to call a routine exported by a
> DLL? If yes, does anyone know the SQL syntax to declare
> it in SQLServer/MSDE
> Best regards
> Peter Sullvan
you can write so called "extended stored procedures" externded by dll... at
http://www.sqldev.net/xp.htm you can find some examples as long as usefull
links..
Andrea Montanari (Microsoft MVP - SQL Server)
http://www.asql.biz/DbaMgr.shtmhttp://italy.mvps.org
DbaMgr2k ver 0.10.0 - DbaMgr ver 0.56.0
(my vb6+sql-dmo little try to provide MS MSDE 1.0 and MSDE 2000 a visual
interface)
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