ST_MaxX

Definition

ST_MaxX takes a geometry as an input parameter and returns its maximum x-coordinate.

Syntax

Oracle and PostgreSQL

sde.st_maxx (geometry1 sde.st_geometry)

SQLite

st_maxx (geometry1 geometryblob)

Return type

Oracle and PostgreSQL

Number

SQLite

Double precision

Example

The table, maxx_test, is created and two polygons inserted to it. The ST_MaxX function is then used to determine the maximum x-value in each polygon.

Oracle

CREATE TABLE maxx_test (
 id integer,
 geometry sde.st_geometry
);

INSERT INTO MAXX_TEST VALUES (
 1901,
 sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO MAXX_TEST VALUES (
 1902,
 sde.st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, sde.st_maxx (geometry) Max_X
 FROM MAXX_TEST;

        ID      MAX_X

      1901        120
      1902          5

PostgreSQL

CREATE TABLE maxx_test (
 id integer,
 geometry sde.st_geometry
);

INSERT INTO maxx_test VALUES (
 1901,
 sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO maxx_test VALUES (
 1902,
 sde.st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, sde.st_maxx (geometry)
 AS Max_X
 FROM maxx_test;

        id      max_x

      1901        120
      1902          5

SQLite

CREATE TABLE maxx_test (
 id integer
);

SELECT AddGeometryColumn (
 NULL,
 'maxx_test',
 'geometry',
 4326,
 'polygonzm',
 'xyzm',
 'null'
);

INSERT INTO maxx_test VALUES (
 1901,
 st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 4326)
);

INSERT INTO maxx_test VALUES (
 1902,
 st_polygon ('polygon zm((0 0 40 7, 0 4 35 9, 5 4 32 12, 5 0 31 5, 0 0 40 7))', 4326)
);

SELECT id, st_maxx (geometry)
 AS "max_x"
 FROM maxx_test;

id      max_x

1901    120.0
1902    5.00000000