ST_GeometryType 使用一個 ST_Geometry 物件並以字串傳回它的幾何類型。
語法
db2gse.ST_GeometryType (g db2gse.ST_Geometry)
回覆類型
Varchar(4000)
範例
GEOMETRYTYPE_TEST 表格包含 G1 幾何直欄。
CREATE TABLE GEOMETRYTYPE_TEST(g1 db2gse.ST_Geometry)
下列 INSERT 陳述式將每一個幾何次類別插入 G1 直欄。
INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('point (10.02 20.01)', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES (db2gse.ST_GeometryFromText('linestring (10.01 20.01, 10.01 30.01, 10.01 40.01)', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_Geometrytype_test values(db2gse.ST_GeomFromText('polygon ((10.02 20.01,11.92 35.64,25.02 34.15,19.15 33.94, 10.02 20.01))', db2gse.coordref()..srid(0)))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('multipoint (10.02 20.01,10.32 23.98,11.92 25.64)', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('multilinestring ((10.02 20.01,10.32 23.98, 11.92 25.64), (9.55 23.75,15.36 30.11))', db2gse.coordref()..srid(0))) INSERT INTO GEOMETRYTYPE_TEST VALUES(db2gse.ST_GeometryFromText('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)))', db2gse.coordref()..srid(0)))
下列 SELECT 陳述式列示儲存在 G1 幾何直欄的每一個次類別的幾何類型。
SELECT db2gse.ST_GeometryType(g1) "Geometry type" FROM GEOMETRYTYPE_TEST
傳回下列結果集。
Geometry type -------------------------------- ST_Point ST_LineString ST_Polygon ST_MultiPoint ST_MultiLineString ST_MultiPolygon 6 record(s) selected.