clearTopoGeom — Clears the content of a topo geometry.
topogeometry clearTopoGeom(topogeometry topogeom
Clears the content a TopoGeometry turning it into an empty one. Mostly useful in conjunction with toTopoGeom to replace the shape of existing objects and any dependent object in higher hierarchical levels.
-- Shrink all TopoGeometry polygons by 10 meters UPDATE nei_topo SET topo = ST_Buffer(clearTopoGeom(topo), -10);