TopoElement
Prev  9.10. 拓扑几何构造函数  Next

Name

TopoElement — 将拓扑几何转换为拓扑元素。

Synopsis

topoelement TopoElement(topogeometry topo);

描述

将 TopoGeometry转换为TopoElement。

可用性：3.4.0

示例

这是一个完整的独立工作流程

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;