TopoElement — Convertit une topogeometry en un topoelement.
topoelement TopoElement(topogeometry topo);
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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;