In relation to this question here as the image below.
I have a multipolygon geometry (red lines) that i want to turn into lines so i can use it to split another multipoint polygon (black blocks) using
Is there a function equivalent to
ST_ExteriorRing that works on multipolygons?
SELECT ST_Split(bldgs.geom, ST_Boundary(admin_boundary)) FROM admin_boundary, bldgs WHERE admin_boundary.borders = 'N4 2';
ERROR: Splitting a Polygon by a MultiLineString is unsupported
ST_ExteriorRing can't be used because it won't work on multipolygons