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