ST_AsText

Definition

ST_AsText takes an ST_Geometry object and returns its well-known text representation.

Syntax

sde.st_astext (g1 sde.st_geometry)

Return type

Oracle: CLOB

PostgreSQL: Text

Example

The ST_AsText function converts the hazardous_sites location point into its text description.

Oracle

CREATE TABLE hazardous_sites (site_id integer,
                             name varchar(40),
                             loc sde.st_geometry);

INSERT INTO HAZARDOUS_SITES VALUES (
102,
'W. H. KleenareChemical Repository',
sde.st_geometry ('point (1020.12 324.02)', 0)
);

SELECT site_id, name, sde.st_astext (loc) Location
FROM HAZARDOUS_SITES;

SITE_ID      NAME                             Location

   102    W. H. KleenareChemical Repository   POINT (1020.12000000 324.02000000)

PostgreSQL

CREATE TABLE hazardous_sites (site_id integer,
                             name varchar(40),
                             loc sde.st_geometry);

INSERT INTO hazardous_sites VALUES (
102,
'W. H. KleenareChemical Repository',
sde.st_point ('point (1020.12 324.02)', 0)
);

SELECT site_id, name, sde.st_astext (loc) 
AS location
FROM hazardous_sites;

site_id      name                             location

   102    W. H. KleenareChemical Repository   POINT (1020.12000001 324.01999999)