ST_RemovePoint() - not a line
:memory: #use in-memory database
SELECT ST_RemovePoint(GeomFromText('MULTIPOINT(0 0, 1 0, 1 1)'), 1)
1 # rows (not including the header row)
1 # columns
ST_RemovePoint(GeomFromText('MULTIPOINT(0 0, 1 0, 1 1)'), 1)
(NULL)
