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\$1NPoints
<a name="ST_NPoints-function"></a>

ST\$1NPoints returns the number of nonempty points in an input geometry or geography. 

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

```
ST_NPoints(geo)
```

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

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

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

`INTEGER`

If *geo* is an empty point, then `0` is returned. 

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

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

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

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

```
st_npoints
-------------
 4
```

The following SQL returns the number of points in a linestring in a geography. 

```
SELECT ST_NPoints(ST_GeogFromText('LINESTRING(110 40, 2 3, -10 80, -7 9)'));
```

```
st_npoints
-------------
 4
```