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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

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Return type

The resulting geometry.

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Example

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

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