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 ](https://aws.amazon.com/blogs/big-data/amazon-redshift-python-user-defined-functions-will-reach-end-of-support-after-june-30-2026/) that was published on June 30, 2025. 

# ST\_NumPoints
<a name="ST_NumPoints-function"></a>

ST\_NumPoints returns the number of points in an input geometry. 

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

```
ST_NumPoints(geom)
```

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

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

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

`INTEGER`

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

If *geom* is not of subtype `LINESTRING`, then null is returned. 

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

The following SQL returns the number of points in the input linestring. 

```
SELECT ST_NumPoints(ST_GeomFromText('LINESTRING(77.29 29.07,77.42 29.26,77.27 29.31,77.29 29.07)'));
```

```
st_numpoints
-------------
4
```

The following SQL returns null because the input *geom* is not of subtype `LINESTRING`. 

```
SELECT ST_NumPoints(ST_GeomFromText('MULTIPOINT(1 2,3 4)'));
```

```
st_numpoints
-------------
```