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\$1MMin
<a name="ST_MMin-function"></a>

ST\$1MMin returns the minimum `m` coordinate of an input geometry. 

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

```
ST_MMin(geom)
```

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

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

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

`DOUBLE PRECISION` value of the minimum `m` coordinate. 

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

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

If *geom* is a 2D or 3DZ geometry, then null is returned. 

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

The following SQL returns the smallest `m` coordinate of a linestring in a 3DM geometry. 

```
SELECT ST_MMin(ST_GeomFromEWKT('LINESTRING M (0 1 2, 3 4 5, 6 7 8)'));
```

```
st_mmin
-----------
  2
```

The following SQL returns the smallest `m` coordinate of a linestring in a 4D geometry. 

```
SELECT ST_MMin(ST_GeomFromEWKT('LINESTRING ZM (0 1 2 3, 4 5 6 7, 8 9 10 11)'));
```

```
st_mmin
-----------
  3
```