Amazon Redshift will no longer support the use of Python UDFs after June 30, 2026. We will start enforcing it in phases. For more information on the details of Python end of life and migration options, see the blog post that was published on June 30, 2025.

ST_AsEWKB

ST_AsEWKB returns the extended well-known binary (EWKB) representation of an input geometry. For 3DZ, 3DM, and 4D geometries, ST_AsEWKB uses the Open Geospatial Consortium (OGC) standard value for the geometry type.

Syntax

ST_AsEWKB(geom)

Arguments

Return type

VARBYTE

If geom is null, then null is returned.

Examples

The following SQL returns the hexadecimal EWKB representation of a polygon.

SELECT ST_AsEWKB(ST_GeomFromText('POLYGON((0 0,0 1,1 1,1 0,0 0))',4326));

st_asewkb
--------------------------------
0103000020E61000000100000005000000000000000000000000000000000000000000000000000000000000000000F03F000000000000F03F000000000000F03F000000000000F03F000000000000000000000000000000000000000000000000