docs/api/snowflake/vector-data/Geometry-Validation/ST_MakeValid.md

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# 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.

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

Format: `ST_MakeValid (A:geometry)`

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

Return type: `Geometry`

SQL example:

```sql
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.