docs/api/sql/Overlay-Functions/ST_Split.md

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# ST_Split

Introduction: Split an input geometry by another geometry (called the blade).
Linear (LineString or MultiLineString) geometry can be split by a Point, MultiPoint, LineString, MultiLineString, Polygon, or MultiPolygon.
Polygonal (Polygon or MultiPolygon) geometry can be split by a LineString, MultiLineString, Polygon, or MultiPolygon.
In either case, when a polygonal blade is used then the boundary of the blade is what is actually split by.
ST_Split will always return either a MultiLineString or MultiPolygon even if they only contain a single geometry.
Homogeneous GeometryCollections are treated as a multi-geometry of the type it contains.
For example, if a GeometryCollection of only Point geometries is passed as a blade it is the same as passing a MultiPoint of the same geometries.

![ST_Split](../../../image/ST_Split/ST_Split.svg "ST_Split")

Return type: `Geometry`

Since: `v1.4.0`

Format: `ST_Split (input: Geometry, blade: Geometry)`

SQL Example

```sql
SELECT ST_Split(
    ST_GeomFromWKT('LINESTRING (0 0, 1.5 1.5, 2 2)'),
    ST_GeomFromWKT('MULTIPOINT (0.5 0.5, 1 1)'))
```

Output:

```
MULTILINESTRING ((0 0, 0.5 0.5), (0.5 0.5, 1 1), (1 1, 1.5 1.5, 2 2))
```