makepolygon - Linestring exterior (not closed)
:memory: #use in-memory database
SELECT MakePolygon(GeomFromText('LINESTRING(1 1, 1 2, 2 2, 2 1)', 4326));
1 # rows (not including the header row)
1 # columns
MakePolygon(GeomFromText('LINESTRING(1 1, 1 2, 2 2, 2 1)', 4326))
(NULL)
