ST_LineString

Définition

La fonction ST_LineString est un accesseur qui construit un objet linestring à partir d'une représentation de texte connu.

Remarque :

When creating spatial tables that will be used with ArcGIS, it is best to create the column as ST_Geometry rather than specifying an ST_Geometry subtype, such as ST_LineString.

Syntaxe

Oracle

sde.st_linestring (wkt clob, srid integer)

PostgreSQL

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

Type de retour

ST_LineString

Exemple

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)