ST_GeomFromEWKT - Amazon Redshift
SyntaxArgumentsReturn typeExamples

Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025. If you would like to use Python UDFs, create the UDFs prior to that date. Existing Python UDFs will continue to function as normal. For more information, see the blog post .

ST_GeomFromEWKT

ST_GeomFromEWKT constructs a geometry object from the extended well-known text (EWKT) representation of an input geometry.

ST_GeomFromEWKT accepts 3DZ, 3DM, and 4D where the geometry type is prefixed with Z, M, or ZM, respectively.

Syntax

ST_GeomFromEWKT(ewkt_string)

Arguments

ewkt_string

A value of data type VARCHAR or an expression that evaluates to a VARCHAR type, that is an EWKT representation of a geometry.

You can use the WKT keyword EMPTY to designate an empty point, a multipoint with an empty point, or a geometry collection with an empty point. The following example creates an empty point. 

ST_GeomFromEWKT('SRID=4326;POINT EMPTY');

Return type

GEOMETRY

If ewkt_string is null, then null is returned.

If ewkt_string is not valid, then an error is returned.

Examples

The following SQL constructs a multilinestring from an EWKT value and returns a geometry. It also returns the ST_AsEWKT result of the geometry. 

SELECT ST_GeomFromEWKT('SRID=4326;MULTILINESTRING((1 0,1 0),(2 0,3 0),(4 0,5 0,6 0))') as geom, ST_AsEWKT(geom);

                                                                                                                                                       geom                                                                                                                                                       |                          st_asewkt                           
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+--------------------------------------------------------------
 0105000020E610000003000000010200000002000000000000000000F03F0000000000000000000000000000F03F00000000000000000102000000020000000000000000000040000000000000000000000000000008400000000000000000010200000003000000000000000000104000000000000000000000000000001440000000000000000000000000000018400000000000000000 | SRID=4326;MULTILINESTRING((1 0,1 0),(2 0,3 0),(4 0,5 0,6 0))