FreeTDS Development Group

[Michael Peppler <mpeppler AT peppler.org>]

Bob Kline writes:
 > On Fri, 27 Jul 2001, Michael Peppler wrote:
 > 
 > > Bob Kline writes:
 > >  > On Fri, 27 Jul 2001, Michael Peppler wrote:
 > >  > > The protocol doesn't handle this natively (at least I don't think
 > >  > > so), so the driver would have to handle this itself.
 > >  > 
 > >  > If by protocol you mean TDS, yes.
 > > 
 > > Do you mean that TDS supports placeholders for stored proc calls? 
 > > If so does it query the server to check for datatypes, quoting, etc?
 > > 
 > > (the Sybase C API doesn't handle this)
 > 
 > I'm not the most knowledgable on the TDS protocol, so I'm fairly
 > confident someone will step in and correct anything I mangle, but off
 > the top of my head the answer to your first question is yes, TDS does
 > support placeholders for stored procedure calls.  

<snipped>

Thanks for the explanation.

The C API for placeholders lets you pass the SQL statement with the ?
(eg "select ... from foo where bar = ?") to ct_dynamic(), and you then
query the server to get the datatype for the parameter to pass. What
you are describing, I think, is what corresponds to the CS_RPC_CMD
request type in C - I've added this to the DBD::Sybase perl driver,
which when it sees "exec some_proc ?" will convert this from
CS_LANG_CMD to a CS_RPC_CMD and process the parameters via ct_param()
calls appropriately.

So I *think* we are talking about the same thing.

Michael
-- 
Michael Peppler - Data Migrations Inc. - http://www.mbay.net/~mpeppler
mpeppler AT peppler.org - mpeppler AT mbay.net
International Sybase User Group - http://www.isug.com