GC, QOF and queries

[Chris Shoemaker]

On Thu, Nov 02, 2006 at 08:47:30AM -0500, Phil Longstaff wrote:
> I have started working on a gda backend and am starting with a QofQuery
> -> SQL translator.  

Have you looked at just directly using the GdaQuery objects?  You can
constuct an abstract query out of GdaQueryFieldFields,
GdaQueryFieldValues and such.  Then, libgda will emit the
provider-specific SQL for that query.

To be frank, IMO, GdaQuery is a better data model for queries than
QofQuery.  By "better", I mean "more appropriate for GnuCash".  I
think it's very unfortunate that GnuCash uses its own home-grown
object-agnostic query representation.  Someone else will probably
disagree.

But, if you re-parented GnuCash's engine objects with a
GnuCash-sepcific GncObject (even with GValue parameters, maybe), and
implemented the QofQuery functionality by generating a GdaQuery, you
would be my hero.  But that's probably more work than you were hoping
for.  *sigh*

Anyway, try to avoid writing the SQL emitter, if you can.

-chris