返回Geometry對(duì)象的類型名,例如LINESTRING,POLYGON, MULTIPOINT。
語(yǔ)法
text GeometryType(geometry geomA);
參數(shù)
參數(shù)名稱 | 描述 |
---|---|
geomA | 目標(biāo)Geometry對(duì)象。 |
描述
- 如果輸入的Geometry對(duì)象帶有M值,該函數(shù)會(huì)返回PointM類型字符串。
- 該函數(shù)支持Circular Strings、Curves、Polyhedral surfaces、Triangles、Triangulated Irregular Network Surfaces(TIN)和3D對(duì)象。
示例
- 默認(rèn)調(diào)用:
SELECT GeometryType('LINESTRING(1 0, 2 0)'::geometry); geometrytype -------------- LINESTRING (1 row)
- 帶有M值的對(duì)象:
SELECT GeometryType('LINESTRINGM(1 0 1, 2 0 2)'::geometry); geometrytype -------------- LINESTRINGM (1 row)