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\$1NumPoints
<a name="ST_NumPoints-function"></a>

ST\$1NumPoints 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
-------------
```