[QGIS-Developer] Attribute table when using big WFS data source

[Richard Duivenvoorde]

Hi Devs,

A question about technical details of the attribute table:

When having some features on your mapcanvas; does QGIS then still have
(links to) the attributes somewhere? Or do we really have to refetch the
features from the datasource?

Context: when connecting to a WFS behind a rather big db, but zoomed in
to say a bbox seeing just 10 features, opening the attribute table seems
to start to fetch ALL features before showing anything.

While I hope, that maybe the attributes are already available. Then we
could for example go for a 'second attribute'-table button with which
you ask for: show me the attribute table of current viewable features
only. Because that is the use-case I often encounter.

BUT if it is just not possible, maybe because a wfs-fetch ony
retrieves/keeps the geometries and it'a id's then this seems not so easy
to implement.

Hope somebody can tell us more,

Regards,

Richard Duivenvoorde