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