ST_IsSolid — Test if the geometry is a solid. No validity check is performed.
boolean ST_IsSolid(geometry geom1);
                 
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                 ST_IsSolid is deprecated as of 3.5.0. Use CG_IsSolid instead.  | 
            
Availability: 2.2.0
            
            This method needs SFCGAL backend.
        
            
            This function supports 3d and will not drop the z-index.
        
            
            This function supports Polyhedral surfaces.
        
            
            This function supports Triangles and Triangulated Irregular Network Surfaces (TIN).