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\$1IsPolygonCW
<a name="ST_IsPolygonCW-function"></a>

ST\$1IsPolygonCW returns true if the 2D projection of the input polygon or multipolygon is clockwise. If the input geometry is a point, linestring, multipoint, or multilinestring, then true is returned. For geometry collections, ST\$1IsPolygonCW returns true if all the geometries in the collection are clockwise. 

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

```
ST_IsPolygonCW(geom)
```

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

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

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

`BOOLEAN`

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

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

The following SQL checks if the polygon is clockwise. 

```
SELECT ST_IsPolygonCW(ST_GeomFromText('POLYGON((7 9,8 7,11 6,15 8,16 6,17 7,17 10,18 12,17 14,15 15,11 15,10 13,9 12,7 9),(9 9,10 10,11 11,11 10,10 8,9 9),(12 14,15 14,13 11,12 14))'));
```

```
 st_ispolygonccw
----------
 true
```