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\$1XMax
<a name="ST_XMax-function"></a>

ST\$1XMax returns the maximum first coordinate of an input geometry. 

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

```
ST_XMax(geom)
```

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

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

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

`DOUBLE PRECISION` value of the maximum first coordinate. 

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

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

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

The following SQL returns the largest first coordinate of a linestring. 

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

```
st_xmax
-----------
 77.42
```