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\$1RemovePoint
<a name="ST_RemovePoint-function"></a>

ST\$1RemovePoint returns a linestring geometry that has the point of the input geometry at an index position removed. 

The index is zero-based. The spatial reference system identifier (SRID) of the result is the same as the input geometry. The dimension of the returned geometry is the same as that of the input geometry.

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

```
ST_RemovePoint(geom, index)
```

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

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

 *index*   
A value of data type `INTEGER` that represents the position of a zero-based index. 

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

`GEOMETRY` 

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

If *geom* is not subtype `LINESTRING`, then an error is returned. 

If *index* is out of range, then an error is returned. Valid values for the index position are between 0 and `ST_NumPoints(geom)` minus 1. 

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

The following SQL removes the last point in a linestring. 

```
WITH tmp(g) AS (SELECT ST_GeomFromText('LINESTRING(0 0,10 0,10 10,5 5,0 5)',4326))
SELECT ST_AsEWKT(ST_RemovePoint(g, ST_NumPoints(g) - 1)) FROM tmp;
```

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