ST_XMax

Syntax

float ST_XMax(box3d aGeomorBox2DorBox3D)

Parameters

Usage notes

The parameter type is declared as box3d, but the function accepts Box2D and geometry objects through auto-casting. Auto-casting does not work when Box2D or geometry objects are passed as plain strings — the function cannot process Box2D or geometry objects in that form.

The function supports 3D objects and preserves z coordinates. It also supports circular strings and curves.

Examples

Box3D input

SELECT ST_XMax('BOX3D(1 2 3, 4 5 6)');
 st_xmax
---------
       4
(1 row)

Geometry input via ST_GeomFromText

SELECT ST_XMax(ST_GeomFromText('LINESTRING(1 3 4, 5 6 7)'));
 st_xmax
---------
       5
(1 row)

Box2D input with explicit cast

SELECT ST_XMax(CAST('BOX(-3 2, 3 4)' AS box2d));
 st_xmax
---------
       3
(1 row)

Default geometry cast (LineString)

SELECT ST_XMax('LINESTRING(0 1,2 3)'::geometry);
 st_xmax
---------
       2
(1 row)