ST_MakeValid

Introduction: Given an invalid geometry, create a valid representation of the geometry.

Collapsed geometries are either converted to empty (keepCollapsed=true) or a valid geometry of lower dimension (keepCollapsed=false). Default is keepCollapsed=false.

Format: ST_MakeValid (A:geometry)

Format: ST_MakeValid (A:geometry, keepCollapsed:Boolean)

Return type: Geometry

SQL example:

WITH linestring AS (
    SELECT ST_GeomFromWKT('LINESTRING(1 1, 1 1)') AS geom
) SELECT ST_MakeValid(geom), ST_MakeValid(geom, true) FROM linestring

Result:

+------------------+------------------------+
|st_makevalid(geom)|st_makevalid(geom, true)|
+------------------+------------------------+
|  LINESTRING EMPTY|             POINT (1 1)|
+------------------+------------------------+

!!!note In Sedona up to and including version 1.2 the behaviour of ST_MakeValid was different. Be sure to check you code when upgrading. The previous implementation only worked for (multi)polygons and had a different interpretation of the second, boolean, argument. It would also sometimes return multiple geometries for a single geometry input.