1shared paths - two polygonM, internal ring 2:memory: #use in-memory database 3SELECT AsText(SharedPaths(GeomFromText('POLYGONM((0 0 4, 10 0 4, 10 10 4, 0 10 4, 0 0 4),(1 1 5, 3 1 5, 3 3 5, 1 3 5, 1 1 5))'),GeomFromText('POLYGONM((5 0 4, 15 0 4, 15 10 4, 5 10 4, 5 0 4))'))) 41 # rows (not including the header row) 51 # columns 6AsText(SharedPaths(GeomFromText('POLYGONM((0 0 4, 10 0 4, 10 10 4, 0 10 4, 0 0 4),(1 1 5, 3 1 5, 3 3 5, 1 3 5, 1 1 5))'),GeomFromText('POLYGONM((5 0 4, 15 0 4, 15 10 4, 5 10 4, 5 0 4))'))) 7MULTILINESTRING M((5 0 0, 10 0 0), (10 10 0, 5 10 0))