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\$1Contains
<a name="ST_Contains-function"></a>

ST\$1Contains returns true if the 2D projection of the first input geometry contains the 2D projection of the second input geometry. Geometry `A` contains geometry `B` if every point in `B` is a point in `A`, and their interiors have nonempty intersection. 

ST\$1Contains(`A`, `B`) is equivalent to ST\$1Within(`B`, `A`). 

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

```
ST_Contains(geom1, geom2)
```

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

 *geom1*   
A value of data type `GEOMETRY` or an expression that evaluates to a `GEOMETRY` type. 

 *geom2*   
A value of data type `GEOMETRY` or an expression that evaluates to a `GEOMETRY` type. This value is compared with *geom1* to determine if it is contained within *geom1*. 

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

`BOOLEAN`

If *geom1* or *geom2* is null, then null is returned. 

If *geom1* and *geom2* don't have the same value for the spatial reference system identifier (SRID), then an error is returned. 

If *geom1* or *geom2* is a geometry collection, then an error is returned. 

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

The following SQL checks if the first polygon contains the second polygon. 

```
SELECT ST_Contains(ST_GeomFromText('POLYGON((0 2,1 1,0 -1,0 2))'), ST_GeomFromText('POLYGON((-1 3,2 1,0 -3,-1 3))'));
```

```
st_contains
-----------
 false
```