1singlesidedbuffer - LINESTRING X, float radius, right side 2:memory: #use in-memory database 3SELECT AsText(SingleSidedBuffer(GeomFromText('LINESTRING(0 0, 0 20)'), 3.5, 0)); 41 # rows (not including the header row) 51 # columns 6AsText(SingleSidedBuffer(GeomFromText('LINESTRING(0 0, 0 20)'), 3.5, 0)) 7POLYGON((0 0, 0 20, 3.5 20, 3.5 0, 0 0)) 8