ST_GeometryType

定义

ST_GeometryType 获取 ST_Geometry 对象，然后以字符串形式返回该对象的几何类型。

语法

sde.st_geometrytype (g1 sde.st_geometry)

返回类型

包含以下其中一项的 Varchar(32)：

• ST_Point
• ST_LineString
• ST_Polygon
• ST_MultiPoint
• ST_MultiLineString
• ST_MultiPolygon

示例

geometrytype_test 表包含 g1 几何列。

INSERT 语句将每个几何子类插入 g1 列。

Oracle

CREATE TABLE geometrytype_test (g1 sde.st_geometry);

INSERT INTO GEOMETRYTYPE_TEST VALUES (
sde.st_geomfromtext ('point (10.02 20.01)', 0)
);

INSERT INTO GEOMETRYTYPE_TEST VALUES (
sde.st_geomfromtext ('linestring (10.01 20.01, 10.01 30.01, 10.01 40.01)', 0)
);

INSERT INTO GEOMETRYTYPE_TEST VALUES (
sde.st_geomfromtext ('polygon ((10.02 20.01, 11.92 35.64, 25.02 34.15,
19.15 33.94, 10.02 20.01))', 0)
);

INSERT INTO GEOMETRYTYPE_TEST VALUES (
sde.st_geomfromtext ('multipoint (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0)
);

INSERT INTO GEOMETRYTYPE_TEST VALUES (
sde.st_geomfromtext ('multilinestring ((10.02 20.01, 10.32 23.98,
11.92 25.64), (9.55 23.75, 15.36 30.11))', 0)
);

INSERT INTO GEOMETRYTYPE_TEST VALUES (
sde.st_geomfromtext ('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 geometrytype_test (g1 sde.st_geometry);

INSERT INTO geometrytype_test VALUES (
sde.st_geometry ('point (10.02 20.01)', 0)
);

INSERT INTO geometrytype_test VALUES (
sde.st_geometry ('linestring (10.01 20.01, 10.01 30.01, 10.01 40.01)', 0)
);

INSERT INTO geometrytype_test VALUES (
sde.st_geometry ('polygon ((10.02 20.01, 11.92 35.64, 25.02 34.15,
19.15 33.94, 10.02 20.01))', 0)
);

INSERT INTO geometrytype_test VALUES (
sde.st_geometry ('multipoint (10.02 20.01, 10.32 23.98, 11.92 25.64)', 0)
);

INSERT INTO geometrytype_test VALUES (
sde.st_geometry ('multilinestring ((10.02 20.01, 10.32 23.98,
11.92 25.64), (9.55 23.75, 15.36 30.11))', 0)
);

INSERT INTO geometrytype_test VALUES (
sde.st_geometry ('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)
);

查询列出 g1 几何列中所存储的每个子类的几何类型。

Oracle

SELECT UPPER (sde.st_geometrytype (g1)) Geometry_type
FROM GEOMETRYTYPE_TEST;

Geometry_type

ST_POINT
ST_LINESTRING
ST_POLYGON
ST_MULTIPOINT
ST_MULTILINESTRING
ST_MULTIPOLYGON

PostgreSQL

SELECT (sde.st_geometrytype (g1)) AS Geometry_type
FROM geometrytype_test;

Geometry_type

ST_POINT
ST_LINESTRING
ST_POLYGON
ST_MULTIPOINT
ST_MULTILINESTRING
ST_MULTIPOLYGON