ST_Dimension

Definición

ST_Dimension devuelve la dimensión de un objeto ST_Geometry.

Sintaxis

sde.st_dimension (g1 sde.st_geometry)

Tipo de devolución

Entero

Ejemplo

La tabla dimension_test se crea con las columnas geotype y g1. La columna geotipo almacena el nombre de la subclase almacenada en la columna de geometría g1.

Oracle

CREATE TABLE dimension_test (geotype varchar(20), g1 sde.st_geometry);  INSERT INTO DIMENSION_TEST VALUES ( 'Point', sde.st_pointfromtext ('point (10.02 20.01)', 0) );  INSERT INTO DIMENSION_TEST VALUES ( 'Linestring', sde.st_linefromtext ('linestring (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0) );  INSERT INTO DIMENSION_TEST VALUES ( 'Polygon', sde.st_polyfromtext ('polygon ((10.02 20.01, 11.92 35.64, 25.02 34.15, 19.15 33.94, 10.02 20.01))', 0) );  INSERT INTO DIMENSION_TEST VALUES ( 'Multipoint', sde.st_mpointfromtext ('multipoint (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0) );  INSERT INTO DIMENSION_TEST VALUES ( 'Multilinestring', sde.st_mlinefromtext ('multilinestring ((10.02 20.01, 10.32 23.98, 11.92 25.64), (9.55 23.75, 15.36 30.11))', 0) );  INSERT INTO DIMENSION_TEST VALUES ( 'Multipolygon', sde.st_mpolyfromtext ('multipolygon (((10.02 20.01, 11.92 35.64, 25.02 34.15, 19.15 33.94, 10.02 20.01), (51.71 21.73, 73.36 27.04, 71.52 32.87, 52.43 31.90, 51.71 21.73)))', 0) );

PostgreSQL

CREATE TABLE dimension_test (geotype varchar(20), g1 sde.st_geometry);  INSERT INTO dimension_test VALUES ( 'Point', sde.st_point ('point (10.02 20.01)', 0) );  INSERT INTO dimension_test VALUES ( 'Linestring', sde.st_linestring ('linestring (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0) );  INSERT INTO dimension_test VALUES ( 'Polygon', sde.st_polygon ('polygon ((10.02 20.01, 11.92 35.64, 25.02 34.15, 19.15 33.94, 10.02 20.01))', 0) );  INSERT INTO dimension_test VALUES ( 'Multipoint', sde.st_multipoint ('multipoint (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0) );  INSERT INTO dimension_test VALUES ( 'Multilinestring', sde.st_multilinestring ('multilinestring ((10.02 20.01, 10.32 23.98, 11.92 25.64), (9.55 23.75, 15.36 30.11))', 0) );  INSERT INTO dimension_test VALUES ( 'Multipolygon', sde.st_multipolygon ('multipolygon (((10.02 20.01, 11.92 35.64, 25.02 34.15, 19.15 33.94, 10.02 20.01), (51.71 21.73, 73.36 27.04, 71.52 32.87, 52.43 31.90, 51.71 21.73)))', 0) );

La declaración SELECT enumera el nombre de subclase almacenado en la columna geotipo con la dimensión de ese geotipo.

Oracle

SELECT geotype, sde.st_dimension (g1) Dimension FROM DIMENSION_TEST;  GEOTYPE                    Dimension  Point                       0 Linestring                  1 Polygon                     2 Multipoint                  0 Multilinestring             1 Multipolygon                2

PostgreSQL

SELECT geotype, sde.st_dimension (g1)  AS Dimension FROM dimension_test;  geotype                  dimension  Point                       0 Linestring                  1 Polygon                     2 Multipoint                  0 Multilinestring             1 Multipolygon                2