ST_Curve
注意:
ST_Geometry in Oracle only
Definition
ST_Curve constructs a curve feature from a well-known text representation.
Syntax
sde.st_curve (wkt clob, srid integer)
Return type
ST_LineString
Example
This example creates a table with a curve geometry, inserts values into it, then selects one feature.
CREATE TABLE curve_test (id integer, geometry sde.st_curve); INSERT INTO CURVE_TEST VALUES ( 1910, sde.st_curve ('linestring (33 2, 34 3, 35 6)', 0) ); SELECT id, sde.st_astext (geometry) CURVE FROM CURVE_TEST; ID CURVE 1110 LINESTRING (33.00000000 2.00000000, 34.00000000 3.00000000, 35.00000000 6.00000000)
3/7/2012