ST_MaxM

Definición

ST_MaxM toma una geometría como un parámetro de entrada y devuelve la coordenada m máxima.

Sintaxis

sde.st_maxm (g1 sde.st_geometry)

Tipo de devolución

Número

Si no hay valores m, se devuelve el valor NULL.

Ejemplo

Oracle

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

INSERT INTO MAXM_TEST VALUES (
1901,
sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 0)
);

INSERT INTO MAXM_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))', 0)
);

SELECT id, sde.st_maxm (geometry) Max_M
FROM MAXM_TEST;

        ID             MAX_M

      1901                 4
      1902                12

PostgreSQL

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

INSERT INTO maxm_test VALUES (
1901,
sde.st_polygon ('polygon zm((110 120 20 3, 110 140 22 3, 120 130 26 4, 110 120 20 3))', 0)
);

INSERT INTO maxm_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))', 0)
);

SELECT id, sde.st_maxm (geometry) 
AS Max_M
FROM maxm_test;

        id             max_m

      1901                 4
      1902                12