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STVertices: Wrapper over STDumpPoints
Oracle’s point dumping function, mdsys.sdo_util.getVertices is most useful. When swapping between platforms sometimes I look first for such a function in SQL Server Spatial forgetting that I named it DumpPoints
Here is a “wrapper” function for STDumpPoints.
USE [GISDB] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE FUNCTION [dbo].[STVertices]( @p_geom geometry ) RETURNS @Points TABLE (x FLOAT, y FLOAT, z FLOAT, m FLOAT ) AS BEGIN INSERT INTO @Points ( [x],[y],[z],[m] ) SELECT [x],[y],[z],[m] FROM dbo.DumpPoints(@p_geom); RETURN; END GO
Testing it….
SELECT e.[x], e.[y] FROM dbo.STVertices( geometry::STGeomFromText('POLYGON ((148.0 -44.0, 148.0 -43.0, 147.0 -43.0, 147.0 -44.0, 148.0 -44.0), (147.4 -43.6, 147.2 -43.6, 147.2 -43.2, 147.4 -43.2, 147.4 -43.6))',0)) AS e;
Result
x | y |
---|---|
148 | -44 |
148 | -43 |
147 | -43 |
147 | -44 |
148 | -44 |
147.4 | -43.6 |
147.2 | -43.6 |
147.2 | -43.2 |
147.4 | -43.2 |
147.4 | -43.6 |
I hope this function is useful to someone.
Documentation
- MySQL Spatial General Functions
- Oracle LRS Objects
- Oracle Spatial Exporter (Java + pl/SQL)
- Oracle Spatial Object Functions
- Oracle Spatial Object Functions (Multi Page)
- PostGIS pl/pgSQL Functions
- SC4O Oracle Java Topology Suite (Java + pl/SQL)
- SQL Server Spatial General TSQL Functions
- SQL Server Spatial LRS TSQL Functions