Oracle Spatial User's Guide and Reference - InfoLab

SDO_AGGR_MBR
Format
Description
Parameters
Usage Notes
SDO_AGGR_MBR(
geom SDO_GEOMETRY
) RETURN SDO_GEOMETRY;
SDO_AGGR_MBR
Returns the minimum bounding rectangle (MBR) of the specified geometries, that
is, a single rectangle that minimally encloses the geometries.
geom
Geometry objects.
Use this function instead of the deprecated SDO_TUNE.EXTENT_OF function to
return the MBR of geometries. The SDO_TUNE.EXTENT_OF function is limited to
two-dimensional geometries, whereas this function is not.
All input geometries must have 4-digit SDO_GTYPE values (explained in
Section 2.2.1).
This function does not return an MBR geometry if a proper MBR cannot be
constructed. Specifically:
■ If the input geometries are all null, the function returns a null geometry.
■ If all data in the input geometries is on a single point, the function returns the
point.
■ If all data in the input geometries consists of points on a straight line, the
function returns a two-point line.
Spatial Aggregate Functions 14-9