In postgis database I have two tables - let's say 'polygons' (gid, the_geom,MultiPolygon,srid=2180) and 'lines' (gid, the_geom,MultLineString,srid=2180). I'd like to use "Add circular string tool" from qgis to create same arcs and save in those layers. From web and from qgis error message (Geometry type (MultiSurface) does not match column type (MultiPolygon); Geometry type (MultiCurve) does not match column type (MultiLineString) I know that I should have tables in postgis with geometry type MultiSurface and MultiCurve.
How should I do that? Can I have that kind of geometry type added respectively to my existing tables ie. MultiSurface to 'polygons' and MultiCurve to 'lines'? If anyone can give working solutions in sql code?