Sets from Cursors Re: VCursor.AddRecord

[Sims, John]

> -----Original Message-----
> From: valentina-bounces at lists.macserve.net 
> [mailto:valentina-bounces at lists.macserve.net] On Behalf Of Ed Kleban
> Sent: Friday, December 02, 2005 10:54 AM
> To: Valentina Developers <valentina at lists.macserve.net>
> Subject: Sets from Cursors Re: VCursor.AddRecord
> 
> 
> 
> 
> On 11/30/05 9:41 AM, "Ruslan Zasukhin" 
> <sunshine at public.kherson.ua> wrote:
> 
> > On 11/28/05 8:13 PM, "Ed Kleban" <Ed at Kleban.com> wrote:
> > 
> >> ...then I'm presuming that...
> >> 
> >>     Vcursor.AddRecord()
> >> will add a new record to BOTH the cursor as well as to the 
> original 
> >> table, correct?
> > 
> > Yes. 
> > 
> > Cursor must be ReadOnly = false
> >  
> > In fact, such cursor do not have own records. It work over original
> 
> Which cursors do not have their own records?
> ReadOnly = false cursors?
> or all cursors?
> 
> Essentially you're telling me that the cursor you get back 
> when readonly = false is internally a bitSet or an ArraySet.
> 
>    Is there a technical reason why you could not provide the 
> functions:
> 
>        VCursor.AsArraySet() as VArraySet
>        Vcursor.AsBitSet() as VBitSet
> 
> Which is different from the question:
> 
>    Is there a philisophical reason why you would NOT like to 
> provide these functions?
> 
> 

Hi Ed,

I certainly can't answer for Ruslan, but one thing that occurred to me
immediately is the fact that VArraySets and VBitSets only hold the
RecID's of the records and, of course, the Vcursor may hold many
different fields.  I'm not sure what the use of converting the Vcursor
to a Vset would be unless you just wanted to get the RecID's of the
records in the Vcursor to iterate through them outside of the
Vcursor...which would allow you to make modifications to fields not in
the Vcursor, meaning you wouldn't have to request that data in the first
place, which lowers the amount of data moving back-and-forth/network
traffic ... Ok, I've kind of talked myself into liking this suggestion
:-)

Ruslan?

-John