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ST_Contains

Definition

ST_Contains takes two geometry objects and returns 1 (Oracle and SQLite) or t (PostgreSQL) if the first object completely contains the second; otherwise, it returns 0 (Oracle and SQLite) or f (PostgreSQL).

Syntax

Oracle and PostgreSQL

sde.st_contains (geometry1 sde.st_geometry, geometry2 sde.st_geometry)

SQLite

st_contains (geometry1 geometryblob, geometry2 geometryblob)

Return type

Boolean

Example

In the examples below, two tables are created. One, buildingfootprints, contains a city's building footprints, while the other, lots, contains the parcels. The city engineer wants to ensure that all building footprints are completely inside their parcels.

The city engineer uses ST_Intersects and ST_Contains to select the buildings that are not completely contained within one lot.

Oracle

--Create tables and insert values.
CREATE TABLE bfp (
 building_id integer,
 footprint sde.st_geometry
);

CREATE TABLE lots (
 lot_id integer,
 lot sde.st_geometry
);

INSERT INTO BFP (building_id, footprint) VALUES (
 1,
 sde.st_polygon ('polygon ((0 0, 0 10, 10 10, 10 0, 0 0))', 4326)
);

INSERT INTO BFP (building_id, footprint) VALUES (
 2,
 sde.st_polygon ('polygon ((20 0, 20 10, 30 10, 30 0, 20 0))', 4326)
);

INSERT INTO BFP (building_id, footprint) VALUES (
 3,
 sde.st_polygon ('polygon ((40 0, 40 10, 50 10, 50 0, 40 0))', 4326)
);

INSERT INTO LOTS (lot_id, lot) VALUES (
 1,
 sde.st_polygon ('polygon ((-1 -1, -1 11, 11 11, 11 -1, -1 -1))', 4326)
);

INSERT INTO LOTS (lot_id, lot) VALUES (
 2,
 sde.st_polygon ('polygon ((19 -1, 19 11, 29 9, 31 -1, 19 -1))', 4326)
);

INSERT INTO LOTS (lot_id, lot) VALUES (
 3,
 sde.st_polygon ('polygon ((39 -1, 39 11, 51 11, 51 -1, 39 -1))', 4326)
);

--Select the buildings that are not completely contained within one lot.
SELECT UNIQUE (building_id)
 FROM BFP, LOTS
 WHERE sde.st_intersects (lot, footprint) = 1
 AND sde.st_contains (lot, footprint) = 0;

BUILDING_ID

          2

PostgreSQL

--Create tables and insert values.
CREATE TABLE bfp (
 building_id serial,
 footprint st_geometry);

CREATE TABLE lots 
 (lot_id serial,
 lot st_geometry);

INSERT INTO bfp (footprint) VALUES (
 st_polygon ('polygon ((0 0, 0 10, 10 10, 10 0, 0 0))', 4326)
);

INSERT INTO bfp (footprint) VALUES (
 st_polygon ('polygon ((20 0, 20 10, 30 10, 30 0, 20 0))', 4326)
);

INSERT INTO bfp (footprint) VALUES (
 st_polygon ('polygon ((40 0, 40 10, 50 10, 50 0, 40 0))', 4326)
);

INSERT INTO lots (lot) VALUES (
 st_polygon ('polygon ((-1 -1, -1 11, 11 11, 11 -1, -1 -1))', 4326)
);

INSERT INTO lots (lot) VALUES (
 st_polygon ('polygon ((19 -1, 19 11, 29 9, 31 -1, 19 -1))', 4326)
);

INSERT INTO lots (lot) VALUES (
 st_polygon ('polygon ((39 -1, 39 11, 51 11, 51 -1, 39 -1))', 4326)
);

--Select the buildings that are not completely contained within one lot.
SELECT DISTINCT (building_id)
 FROM bfp, lots
 WHERE st_intersects (lot, footprint) = 't'
 AND st_contains (lot, footprint) = 'f';

building_id

          2

SQLite

--Create tables, add geometry columns, and insert values.
CREATE TABLE bfp (
 building_id integer primary key autoincrement not null
);

SELECT AddGeometryColumn (
 NULL,
 'bfp',
 'footprint',
 4326,
 'polygon',
 'xy',
 'null'
);

CREATE TABLE lots 
 (lot_id integer primary key autoincrement not null
);

SELECT AddGeometryColumn (
 NULL,
 'lots',
 'lot',
 4326,
 'polygon',
 'xy',
 'null'
);

INSERT INTO bfp (footprint) VALUES (
 st_polygon ('polygon ((0 0, 0 10, 10 10, 10 0, 0 0))', 4326)
);

INSERT INTO bfp (footprint) VALUES (
 st_polygon ('polygon ((20 0, 20 10, 30 10, 30 0, 20 0))', 4326)
);

INSERT INTO bfp (footprint) VALUES (
 st_polygon ('polygon ((40 0, 40 10, 50 10, 50 0, 40 0))', 4326)
);

INSERT INTO lots (lot) VALUES (
 st_polygon ('polygon ((-1 -1, -1 11, 11 11, 11 -1, -1 -1))', 4326)
);

INSERT INTO lots (lot) VALUES (
 st_polygon ('polygon ((19 -1, 19 11, 29 9, 31 -1, 19 -1))', 4326)
);

INSERT INTO lots (lot) VALUES (
 st_polygon ('polygon ((39 -1, 39 11, 51 11, 51 -1, 39 -1))', 4326)
);

--Select the buildings that are not completely contained within one lot.
SELECT DISTINCT (building_id)
 FROM bfp, lots
 WHERE st_intersects (lot, footprint) = 1
 AND st_contains (lot, footprint) = 0;

building_id

2

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