Extensions
Scalar Functions
```sql
POINT_2D ST_Centroid (col0 POINT_2D)
POINT_2D ST_Centroid (col0 LINESTRING_2D)
POINT_2D ST_Centroid (col0 POLYGON_2D)
POINT_2D ST_Centroid (col0 BOX_2D)
POINT_2D ST_Centroid (col0 BOX_2DF)
GEOMETRY ST_Centroid (col0 GEOMETRY)
```