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ST_MinM

  • Definition
  • Syntax
  • Return type
  • Example

Definition

ST_MinM takes a geometry as an input parameter and returns its minimum m-coordinate.

Syntax

Oracle and PostgreSQL

sde.st_minm (geometry1 sde.st_geometry)

SQLite

st_minm (geometry1 geometryblob)

Return type

Oracle and PostgreSQL

Number

If no m values are present, NULL is returned.

SQLite

Double precision

If no m values are present, NULL is returned.

Example

The table, minm_test, is created and two polygons inserted to it. ST_MinM is then run to determine the minimum measure value in each polygon.

PostgreSQL

Oracle

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

INSERT INTO MINM_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 MINM_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_minm (geometry) MinM
 FROM MINM_TEST;

        ID       MINM

      1901          3
      1902          5

PostgreSQL

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

INSERT INTO minm_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 minm_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_minm (geometry) 
 AS MinM
 FROM minm_test;

        id       minm

      1901          3
      1902          5

SQLite

CREATE TABLE minm_test (
 id integer
);

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

INSERT INTO minm_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 minm_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_minm (geometry) 
 AS "MinM"
 FROM minm_test;

id       MinM

1901     3.0
1902     5.0

Related topics

  • Load the SQLite ST_Geometry library

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