TopoElement — Converts a topogeometry to a topoelement.
topoelement TopoElement(topogeometry topo);
다음은 완전히 자급자족하는 독립적인 작업 흐름(workflow)입니다.
Return the TopoElement representation of each topogeometry.
SELECT TopoElement(topo) FROM neighborhoods;
Use a cast to aggregate topogeometries into a TopoElementArray.
SELECT topology.TopoElementArray_Agg(topo::topoelement) FROM neighborhoods GROUP BY city;