Returns true if a geometry object is empty, or false if it contains at least one point. Supported geometry types include GeometryCollection, polygon, and point, as well as circular strings and curves.
Syntax
boolean ST_IsEmpty(geometry geomA)Parameters
| Parameter | Description |
|---|---|
geomA | The geometry object to evaluate. |
Examples
Empty GeometryCollection — returns true:
SELECT ST_IsEmpty('GEOMETRYCOLLECTION EMPTY'::geometry);
st_isempty
------------
t
(1 row)Empty polygon — returns true:
SELECT ST_IsEmpty('POLYGON EMPTY'::geometry);
st_isempty
------------
t
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