> "Dr. Ferenc Nagy" <[log in to unmask]> wrote: > > >I have a detail
Dr. Ferenc Nagy" <[log in to unmask]> wrote:
>
> >I have a detail set which is hanging on four master sets.
> >M1 M2 M2 M4
> >|--|--|--|
> >    D
>
> >The search items are K1, K2, K3, K4 respectively.
> >If I issue a DBFIND with setname=D and item=K1 and key_value="V1" then the
> >subsequent chained DBGET-s are going along the chain of K1="V1" values.
> >The status vector will contain the pointers of the previous and the next
> >D entry with the same K1="V1" value. How can I read the pointers of the
> >other three chains i.e. the pointers to the previous and next same
> >K2="V2", K3="V3" and K4="V4"?
>
> It's easy: you do a DBFIND on whichever path you want info on, then do a
> directed DBGET.  The DBFIND tells Image, "I want to work with this path now"
> and the directed DBGET re-gets the current record -- but now it contains the
> pointers for the path of interest.
>
> The undocumented mode is calling DBOPEN with an open mode of "-1"; this is
> documented in the IMAGE handbook; the handbook also has examples using
> DBDRIVER.  Another tool you might try using is a TELESUP utility called
> SCALPEL that's used for fixing databases (or messing them up if you're not
> careful).
>
Image, "I want to work with this path now"
> and the directed DBGET
re-gets the current record -- but now it contains the
> pointers for the
path of interest.
> > The undocumented mode is calling DBOPEN with an open
mode of "-1"; this is
> documented in the IMAGE handbook; the handbook
also has examples using
> DBDRIVER.  Another tool you might try using is a
TELESUP utility called
> SCALPEL that's used for fixing databases (or
messing them up if you're not
> careful).
>
Thank you, Evan. And thanks for the phone call from Fred White. Where can
I obtain this Image Handbook? Who are selling it, for what price? It
seems to me, that I have seen it in Redwood City, on Stan Sieler's
bookshelf.
 
                                                Frank
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