26.26 SDO_LRS.IS_MEASURE_DECREASING

Format

SDO_LRS.IS_MEASURE_DECREASING(
     geom_segment IN SDO_GEOMETRY 
     [, dim_array IN SDO_DIM_ARRAY] 
     ) RETURN VARCHAR2;

Description

Checks if the measure values along an LRS segment are decreasing (that is, descending in numerical value).

Parameters

geom_segment

Geometric segment (LRS segment) containing measure information.

dim_array

Dimensional information array corresponding to geom_segment, usually selected from one of the xxx_SDO_GEOM_METADATA views (described in Geometry Metadata Views).

Usage Notes

This function returns TRUE if the measure values along an LRS segment are decreasing and FALSE if the measure values along an LRS segment are not decreasing.

The start and end measures of geom_segment must be defined (cannot be null).

The _3D format of this function (SDO_LRS.IS_MEASURE_DECREASING_3D) is available. For information about _3D formats of LRS functions, see 3D Formats of LRS Functions.

See also the SDO_LRS.IS_MEASURE_INCREASING function.

Examples

The following example checks if the measure values along the geometric segment representing Route 1 are decreasing. (This example uses the definitions from the example in Example of LRS Functions.)

SELECT SDO_LRS.IS_MEASURE_DECREASING(a.route_geometry, m.diminfo)
   FROM lrs_routes a, user_sdo_geom_metadata m
   WHERE m.table_name = 'LRS_ROUTES' AND m.column_name = 'ROUTE_GEOMETRY'
   AND a.route_id = 1;

SDO_LRS.IS_MEASURE_DECREASING(A.ROUTE_GEOMETRY,M.DIMINFO)                       
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FALSE