[plt-scheme] SrPersist and bind-parameter

I didn't know SQL supported that ? sign :)
ifconfig
BAGOS
http://bagos.sourceforge.net


----- Original Message ----- 
From: "Alex Peake" <alex.peake at comac.com>
To: "ifconfig" <ifconfignslookup at hotmail.com>;
<plt-scheme at list.cs.brown.edu>
Sent: Thursday, February 19, 2004 9:40 PM
Subject: RE: [plt-scheme] SrPersist and bind-parameter


>   For list-related administrative tasks:
>   http://list.cs.brown.edu/mailman/listinfo/plt-scheme
>
> This is a variable parameter. This is done so you can compile the query
once, and rebind the
> variable to different values (usually in a loop). This is typical stuff
with databases (and so
> ODBC).
>
> And of course this is the part causing the difficulty.
>
> Alex
>
> > -----Original Message-----
> > From: ifconfig [mailto:ifconfignslookup at hotmail.com]
> > Sent: Thursday, February 19, 2004 11:29 AM
> > To: Alex Peake; plt-scheme at list.cs.brown.edu
> > Subject: Re: [plt-scheme] SrPersist and bind-parameter
> >
> >
> > Why the "AND rel = ?"?
> >
> > ifconfig
> > BAGOS
> > http://bagos.sourceforge.net
> >
> >
> > ----- Original Message -----
> > From: "Alex Peake" <alex.peake at comac.com>
> > To: <plt-scheme at list.cs.brown.edu>
> > Sent: Thursday, February 19, 2004 2:12 AM
> > Subject: [plt-scheme] SrPersist and bind-parameter
> >
> >
> > >   For list-related administrative tasks:
> > >   http://list.cs.brown.edu/mailman/listinfo/plt-scheme
> > >
> > > Could someone please help with this?
> > >
> > > (define table-select
> > >   (string-append
> > >     "SELECT rel, attr, domain, domlength, domprec, nullable,
PKCOLSEQNUM
> > AS pkpos, fkpos, fktable,
> > > fkattr "
> > >     " FROM Gen_Schema, syspkconstraints PK"
> > >     " WHERE Gen_Schema.rel = PK.Name (+)"
> > >     " AND Gen_Schema.attr = PK.ColName (+)"
> > >     " AND rel = ?"))
> > >
> > > (define tname-buffer (make-buffer '(sql-c-char 18)))
> > > (define tname-indicator (make-indicator))
> > > (write-buffer! tname-buffer "INVENTORY")
> > > (prepare hstmt table-select)
> > > (bind-parameter hstmt 1 'sql-param-input 'sql-varchar 18 tname-buffer
> > tname-indicator)
> > > (sql-execute hstmt)
> > >
> > > returns no rows, even though a check of tname-buffer reveals
"INVENTORY".
> > The database gets a NULL
> > > binding - the parameter is empty.
> > >
> > >
> > > and yet with:     " AND rel = 'INVENTORY'"))
> > >
> > > I get all the appropriate rows.
> > >
> > > I obviously have the process wrong, but cannot find what.
> > >
> > > Alex
> > >
> > >
>
>