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\$1IsPolygonCCW
<a name="ST_IsPolygonCCW-function"></a>

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

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

```
ST_IsPolygonCCW(geom)
```

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

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

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

`BOOLEAN`

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

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

The following SQL checks if the polygon is counterclockwise. 

```
SELECT ST_IsPolygonCCW(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
```