Oracle Spatial User's Guide and Reference - InfoLab

SDO_UTIL.GETVERTICES
SDO_UTIL.GETVERTICES
Format
Description
Parameters
Usage Notes
SDO_UTIL.GETVERTICES(
geometry IN SDO_GEOMETRY
) RETURN VERTEX_SET_TYPE;
Returns the coordinates of the vertices of the input geometry.
geometry
Geometry for which to return the coordinates of the vertices.
This function returns an object of VERTEX_SET_TYPE, which consists of a table of
objects of VERTEX_TYPE. Oracle Spatial defines the type VERTEX_SET_TYPE as:
CREATE TYPE vertex_set_type as TABLE OF vertex_type;
Oracle Spatial defines the object type VERTEX_TYPE as:
CREATE TYPE vertex_type AS OBJECT
(x NUMBER,
y NUMBER,
z NUMBER,
w NUMBER,
id NUMBER);
This function can be useful in finding a vertex that is causing a geometry to be
invalid. For example, if you have identified a geometry as invalid by using the
SDO_GEOM.VALIDATE_GEOMETRY_WITH_CONTEXT function or the SDO_
GEOM.VALIDATE_LAYER_WITH_CONTEXT procedure (both of which are
documented in Chapter 13), you can use the GETVERTICES function to view the
vertices in tabular format.
19-18 Oracle Spatial User’s Guide and Reference