is it possible to "refine" an existing QofQuery multiple times?

[Christian Stimming]

Derek,

by the way, this "enhancement request" to the QOF API is still valid. I'd love 
if a subquery on a qof query were implemented, because then I'd subsequently 
be able to speed up the generic importer (hopefully) quite a lot.

Is it possible for you sometime in the future to implement what you've 
outlined? Thanks a lot in advance.

Christian

Am Sonntag, 6. August 2006 16:20 schrieb Derek Atkins:
> No, there's no way to take the results of a query and run a subquery on it.
> HOWEVER, I think adding that functionality might be pretty easy.  We could
> add something like:
>
> GList* qof_query_run_subquery(QofQuery* subq, QofQuery* q);
>
> Note that running qof_query_run() on the same query multiple times will
> re-iterate over the full book, but you can use qof_query_last_run()
> to just return the last set.
>
> I think adding this new API would be relatively simple.
> What you've provided below will still iterate multiple times.  Using
> this new API you'd do something like:
>
> ...
> [ setup query ]
> ...
> (void)qof_query_run(stored_query);
> ...
> loop {
>   ...
>   [ setup subquery ]
>   results = qof_query_run_subquery(subq, stored_q);
>   ...
> }
>
> -derek
>
> Quoting Christian Stimming <stimming at tuhh.de>:
> > Just a question about the qofquery.h interface: Is it possible to refine
> > a query multiple times?