TopoGeom_addTopoGeom — Adds element of a TopoGeometry to the definition of another TopoGeometry.
topogeometry
TopoGeom_addTopoGeom
(
topogeometry
tgt
, topogeometry
src
)
;
Adds the elements of a TopoGeometry to the definition of another TopoGeometry, possibly changing its cached type (type attribute) to a collection, if needed to hold all elements in the source object.
The two TopoGeometry objects need be defined against the *same* topology and, if hierarchically defined, need be composed by elements of the same child layer.
Availability: 3.2
-- Set an "overall" TopoGeometry value to be composed by all
-- elements of specific TopoGeometry values
UPDATE mylayer SET tg_overall = TopoGeom_addTopogeom(
TopoGeom_addTopoGeom(
clearTopoGeom(tg_overall),
tg_specific1
),
tg_specific2
);