I want to export a layer with holed geometries in it. But when I save my features to shapefile in QGIS 3 it creates a file with
MultiPolygon as geometry type. The fact is that a holed polygon isn't a multi-surfacic polygon and I want to export it as
I tried to modify manually the WKT with
geom_from_wkt() with following formula :
geom_from_wkt( replace( replace( geom_to_wkt( $geometry ), 'MultiPolygon (', 'Polygon '), ')))', '))' ) )
Geometry by expression and the temporary layer created by this algorithm is correct (with
Polygon type) but when I save it to shapefile it puts
MultiPolygon back again.