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/). 

# AddBBox
<a name="AddBBox-function"></a>

AddBBox returns a copy of the input geometry that supports encoding with a precomputed bounding box. For more information about support for bounding boxes, see [Bounding box](spatial-terminology.md#spatial-terminology-bounding-box).

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

```
AddBBox(geom)
```

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

 *geom*   
A value of data type `GEOMETRY` or an expression that evaluates to a `GEOMETRY` type.

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

`GEOMETRY`

If *geom* is null, then null is returned.

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

The following SQL returns a copy of an input polygon geometry that supports being encoded with a bounding box. 

```
SELECT ST_AsText(AddBBox(ST_GeomFromText('POLYGON((0 0,1 0,0 1,0 0))')));
```

```
 st_astext
----------
 POLYGON((0 0,1 0,0 1,0 0))
```