OpenEuphoria

Re: EDS Autonumber

• Posted by cklester <cklester at yahoo.com> Dec 02, 2005
• 510 views

Matt Lewis wrote:
> cklester wrote:
> > Greg Haberek wrote:
> > > global function db_next_key()
> > >     integer count
> > >     count = db_table_size()
> > >     if count = 0 then
> > >         key = 0
> > >     else
> > >         key = db_record_key( count )
> > >     end if
> > >     return key+1
> > > end function
> > You'd need something like
> >    while keyExists( count ) do
> >         count += 1
> >    end while
> > so as to avoid duplicate keys in cases where records get deleted.
> 
> No, his method would work fine, because EDS always keeps the records sorted
> by key, so the last record is guaranteed to be the highest number currently
> in the table.  Note that count is the record number of the last record, and
> key is the acutal key value.  Of course, you'd need to define 'atom key'
> to make this routine work...

Oh, I see. I misread and thought he was just using the size, like Rob said.

-=ck
"Programming in a state of Euphoria."
http://www.cklester.com/euphoria/