linestr := linestr||','||ST_X(nextnode.geometry)||' '||ST_Y(nextnode.geometry);
endnumber := ('0'||substring(nextnode.housenumber,'[0-9]+'))::integer;
linestr := linestr||','||ST_X(nextnode.geometry)||' '||ST_Y(nextnode.geometry);
endnumber := ('0'||substring(nextnode.housenumber,'[0-9]+'))::integer;