ST_OrderingEquals
Prev  7.11.1. Relazioni Topologiche  Next

Name

ST_OrderingEquals — Tests if two geometries represent the same geometry and have points in the same directional order

Synopsis

boolean ST_OrderingEquals(geometry A, geometry B);

Descrizione

ST_OrderingEquals compares two geometries and returns t (TRUE) if the geometries are equal and the coordinates are in the same order; otherwise it returns f (FALSE).

[Note]

This function is implemented as per the ArcSDE SQL specification rather than SQL-MM. http://edndoc.esri.com/arcsde/9.1/sql_api/sqlapi3.htm#ST_OrderingEquals

Questo metodo implementa la specifica SQL/MM. SQL-MM 3: 5.1.43

Esempi

SELECT ST_OrderingEquals(
  'LINESTRING(0 0, 10 10)',
  'LINESTRING(0 0, 5 5, 10 10)');

 st_orderingequals
-----------
 f


SELECT ST_OrderingEquals(
  'LINESTRING(0 0, 10 10)',
  'LINESTRING(0 0, 10 10)');

 st_orderingequals
-----------
 t


SELECT ST_OrderingEquals(
  'POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))',
  'POLYGON((0 0, 1 0, 1 1, 0 1, 0 0))');

 st_orderingequals
-----------
 f

Si veda anche

&&, ST_Equals, ST_Reverse