ST_Perimeter2D
Name
ST_Perimeter2D — Returns the 2-dimensional perimeter of the geometry, if it is a polygon or multi-polygon. This is currently an alias for ST_Perimeter.
Synopsis
    
     float
     
      ST_Perimeter2D
     
     (
    
    geometry
    
     geomA
    
    
     )
    
    ;