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\$1LineFromMultiPoint
<a name="ST_LineFromMultiPoint-function"></a>

ST\$1LineFromMultiPoint returns a linestring from an input multipoint geometry. The order of the points is preserved. The spatial reference system identifier (SRID) of the returned geometry is the same as that of the input geometry. The dimension of the returned geometry is the same as that of the input geometry.

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

```
ST_LineFromMultiPoint(geom)
```

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

 *geom*   
A value of data type `GEOMETRY` or an expression that evaluates to a `GEOMETRY` type. The subtype must be `MULTIPOINT`. 

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

`GEOMETRY`

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

If *geom* is empty, then an empty `LINESTRING` is returned. 

If *geom* contains empty points, then these empty points are ignored. 

If *geom* isn't a `MULTIPOINT`, then error is returned. 

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

The following SQL creates a linestring from a multipoint. 

```
SELECT ST_AsEWKT(ST_LineFromMultiPoint(ST_GeomFromText('MULTIPOINT(0 0,10 0,10 10,5 5,0 5)',4326)));
```

```
 st_asewkt
---------------------------------------------
 SRID=4326;LINESTRING(0 0,10 0,10 10,5 5,0 5)
```