ST_LineString

定义

ST_LineString 是一个通过熟知文本表示构造线串的存取函数。

注:

创建将用于 ArcGIS 的空间表时，最好将列创建为 ST_Geometry，而不要指定一个 ST_Geometry 子类型，如 ST_LineString。

语法

Oracle

sde.st_linestring (wkt clob, srid integer)

PostgreSQL

sde.st_linestring (wkt, srid integer)
sde.st_linestring (esri_shape bytea, srid integer)

返回类型

ST_LineString

示例

Oracle

CREATE TABLE lines_test (id smallint, geometry sde.st_geometry);
 
INSERT INTO LINES_TEST (id, geometry) VALUES (
1901,
sde.st_linestring ('linestring (750 150, 750 750)', 0)
);

SELECT id, sde.st_astext (geometry) Linestring
FROM   LINES_TEST;

  ID  LINESTRING

1901  LINESTRING  (750.00000000 150.00000000, 
750.00000000 750.00000000)

PostgreSQL

CREATE TABLE lines_test (id integer, geometry st_geometry);
 
INSERT INTO lines_test (id, geometry) VALUES (
1901,
sde.st_linestring ('linestring (750 150, 750 750)', 0)
);

SELECT id, sde.st_astext (geometry) AS Linestring
FROM   lines_test;

  id  linestring

1901  LINESTRING  (750 150, 750 750)