Catégories :: Fonctions géospatiales

ST_WITHIN¶

Returns true if the the first geospatial object is fully contained by the second geospatial object. In other words:

The first GEOGRAPHY object g1 is fully contained by the second GEOGRAPHY object g2.
The first GEOMETRY object g1 is fully contained by the second GEOMETRY object g2.

Calling ST_WITHIN(g1, g2) is equivalent to calling ST_CONTAINS(g2, g1).

Although ST_COVEREDBY and ST_WITHIN might seem similar, the two functions have subtle differences. For details on the differences between « covered by » and « within », see the Dimensionally Extended 9-Intersection Model (DE-9IM).

Note

Cette fonction ne prend pas en charge l’utilisation de GeometryCollection ou de FeatureCollection comme valeurs d’entrée.

Voir aussi :: ST_CONTAINS , ST_COVEREDBY

Syntaxe¶

ST_WITHIN( <geography_expression_1> , <geography_expression_2> )

ST_WITHIN( <geometry_expression_1> , <geometry_expression_2> )

Arguments¶

geography_expression_1: Un objet GEOGRAPHY qui n’est pas un GeometryCollection ou un FeatureCollection.
geography_expression_2: Un objet GEOGRAPHY qui n’est pas un GeometryCollection ou un FeatureCollection.
geometry_expression_1: A GEOMETRY object that is not a GeometryCollection or FeatureCollection.
geometry_expression_2: A GEOMETRY object that is not a GeometryCollection or FeatureCollection.

Renvoie¶

BOOLEAN.

Exemples¶

GEOGRAPHY Examples¶

Cela montre une utilisation simple de la fonction ST_WITHIN :

create table geospatial_table_01 (g1 GEOGRAPHY, g2 GEOGRAPHY);
insert into geospatial_table_01 (g1, g2) values 
    ('POLYGON((0 0, 3 0, 3 3, 0 3, 0 0))', 'POLYGON((1 1, 2 1, 2 2, 1 2, 1 1))');

SELECT ST_WITHIN(g1, g2) 
    FROM geospatial_table_01;
+-------------------+
| ST_WITHIN(G1, G2) |
|-------------------|
| False             |
+-------------------+