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\$1GeomFromEWKB
<a name="ST_GeomFromEWKB-function"></a>

ST\$1GeomFromEWKB constructs a geometry object from the extended well-known binary (EWKB) representation of an input geometry. 

ST\$1GeomFromEWKB accepts 3DZ, 3DM, and 4D geometries written in WKB and EWKB hexadecimal format.

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

```
ST_GeomFromEWKB(ewkb_string)
```

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

 *ewkb\$1string*   
A value of data type `VARCHAR` that is a hexadecimal EWKB representation of a geometry.

## Return type
<a name="ST_GeomFromEWKB-function-return"></a>

`GEOMETRY`

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

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

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

The following SQL constructs a polygon from an EWKB value and returns the EWKT representation of a polygon. 

```
SELECT ST_AsEWKT(ST_GeomFromEWKB('0103000020E61000000100000005000000000000000000000000000000000000000000000000000000000000000000F03F000000000000F03F000000000000F03F000000000000F03F000000000000000000000000000000000000000000000000'));
```

```
 st_asewkt
--------------------------------
 SRID=4326;POLYGON((0 0,0 1,1 1,1 0,0 0))
```