FreeTDS Development Group

[craigs <s.craig AT andronics.com>]

can i do the following using dbcanquery()

while (dbnextrow(dbconn) != NO_MORE_ROWS)
{
        bind results to varialbes

        if ( find what i want )
        {
                do something here
                now exit doing the following

                dbcanquery(dbconn);
        }
}

will this let me exit the loop correctly with the variables still set?



Thompson, Bill D (London) wrote:

> Easy, cowboy.
>
> well, *might* is right , if you'll excuse the pun - as there is one
> circumstance when it wouldn't go wrong.
>
> On the other hand, I *might* not have had the time to go into all the
> gory details :-)
>
> Yours non-specifically,
>
> Bill
>
> -----Original Message-----
> From: freetds-bounces AT lists.ibiblio.org
> [mailto:freetds-bounces AT lists.ibiblio.org] On Behalf Of Lowden, James K
> Sent: 08 March 2005 17:57
> To: ml AT freetds.org
> Subject: RE: [freetds] dbnextrow() question
>
>
>  
>
> > From: Thompson, Bill D (London)
> > Sent: Tuesday, March 08, 2005 6:01 AM
> >
> > your next call to dblibrary *might* fail with a "results pending" type
> > error though, if you tray and do another operation on the same channel
> >    
>
> What "might"?  *Will* fail, period.  
>
> The code below doesn't tell the server to stop sending rows, and doesn't
> tell the library the that the result set was exhausted/cancelled.
> db-lib maintains information about the state of the connection, and will
> refuse to send another query.  Anything else is a bug.  
>
> The only exception would be if the last row fetched happened also to be
> the last row sent, i.e., the last row of the result set.  Some
> implementations of db-lib (not FreeTDS, afaik), will note the
> end-of-rowset packet and update the internal connection status
> automatically.  Others will not do so until dbnextrow returns
> NO_MORE_ROWS.  
>
> Am I missing something?  
>
> --jkl
>
>
>  
>
> > -----Original Message-----
> > From: freetds-bounces AT lists.ibiblio.org
> > [mailto:freetds-bounces AT lists.ibiblio.org] On Behalf Of craigs
> > Sent: 08 March 2005 10:58
> > To: FreeTDS Development Group
> > Subject: Re: [freetds] dbnextrow() question
> >
> >
> > found an easier way of doin it.
> >
> > while (dbnextrow(dbconn) != NO_MORE_ROWS)
> > {
> >      if ( find what i want )
> >      {
> >            do something here
> >            now exit doing the following
> >
> >             return NO_MORE_ROWS; // this will let you exit
> >      }
> > }
> >
> >
> > Thompson, Bill D (London) wrote:
> >
> >    
> >
> > > Shaun
> > >
> > > see dbcanquery() or dbcancel() . dbcanquery looks like exactly what
> > >      
> you
>  
>
> > > want.
> > >
> > > -----Original Message-----
> > > From: freetds-bounces AT lists.ibiblio.org
> > > [mailto:freetds-bounces AT lists.ibiblio.org] On Behalf Of craigs
> > > Sent: 04 March 2005 12:19
> > > To: FreeTDS Development Group
> > > Subject: [freetds] dbnextrow() question
> > >
> > >
> > > Could someone tell me how to exit this loop?  I dont want to run
> > >      
> > through
> >    
> >
> > > thousands of unnecessary records when i find the one i want.
> > >
> > > while (dbnextrow(dbconn) != NO_MORE_ROWS)
> > > {
> > >     if ( find what i want )
> > >     {
> > >           do something here
> > >           now i want to exit out off this loop
> > >     }
> > > }
> > >
> > > Shaun
> > >      
>
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