ST_Dimension returns the dimension of a geometry object.
Oracle
sde.st_dimension (g1 sde.st_geometry)
PostgreSQL
st_dimension (g1 st_geometry)
The dimension_test table is created with the columns geotype and g1. The geotype column stores the name of the subclass stored in the g1 geometry column.
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 st_geometry);
INSERT INTO dimension_test VALUES (
'Point',
st_point ('point (10.02 20.01)', 0)
);
INSERT INTO dimension_test VALUES (
'Linestring',
st_linestring ('linestring (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0)
);
INSERT INTO dimension_test VALUES (
'Polygon',
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',
st_multipoint ('multipoint (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0)
);
INSERT INTO dimension_test VALUES (
'Multilinestring',
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',
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)
);
The SELECT statement lists the subclass name stored in the geotype column with the dimension of that geotype.
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, st_dimension (g1) AS Dimension
FROM dimension_test;
geotype dimension
Point 0
Linestring 1
Polygon 2
Multipoint 0
Multilinestring 1
Multipolygon 2