Amazon Redshift will no longer support the creation of new Python UDFs starting Patch 198. Existing Python UDFs will continue to function until June 30, 2026. For more information, see the [ blog post ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/). 

# ST\$1GeomFromEWKT
<a name="ST_GeomFromEWKT-function"></a>

ST\$1GeomFromEWKT constructs a geometry object from the extended well-known text (EWKT) representation of an input geometry. 

ST\$1GeomFromEWKT accepts 3DZ, 3DM, and 4D where the geometry type is prefixed with Z, M, or ZM, respectively.

## Syntax
<a name="ST_GeomFromEWKT-function-syntax"></a>

```
ST_GeomFromEWKT(ewkt_string)
```

## Arguments
<a name="ST_GeomFromEWKT-function-arguments"></a>

 *ewkt\$1string*   
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
<a name="ST_GeomFromEWKT-function-return"></a>

`GEOMETRY`

If *ewkt\$1string* is null, then null is returned. 

If *ewkt\$1string* is not valid, then an error is returned. 

## Examples
<a name="ST_GeomFromEWKT-function-examples"></a>

The following SQL constructs a multilinestring from an EWKT value and returns a geometry. It also returns the ST\$1AsEWKT 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))
```