Extensions
Scalar Functions
```sql
DOUBLE ST_Distance (col0 POINT_2D, col1 POINT_2D)
DOUBLE ST_Distance (col0 POINT_2D, col1 LINESTRING_2D)
DOUBLE ST_Distance (col0 LINESTRING_2D, col1 POINT_2D)
DOUBLE ST_Distance (col0 GEOMETRY, col1 GEOMETRY)
```