ST_Y
Prev  7.4. Acessors de Geometria  Next

Name

ST_Y — Returns the Y coordinate of a Point.

Synopsis

float ST_Y(geometry a_point);

Descrição

Retorna a coordenada Y do ponto, ou NULA se não estiver disponível. Entrada deve ser um ponto.

[Note]

To get the minimum and maximum Y value of geometry coordinates use the functions ST_YMin and ST_YMax.

This method implements the OGC Simple Features Implementation Specification for SQL 1.1.

This method implements the SQL/MM specification. SQL-MM 3: 6.1.4

This function supports 3d and will not drop the z-index.

Exemplos

SELECT ST_Y(ST_GeomFromEWKT('POINT(1 2 3 4)'));
 st_y
------
        2
(1 row)

SELECT ST_Y(ST_Centroid(ST_GeomFromEWKT('LINESTRING(1 2 3 4, 1 1 1 1)')));
 st_y
------
  1.5
(1 row)