- say pp({ $db->select(word => "coalesce(ref, id), exportform(row(form,alt,lang,cat,ref,prio,source,thumb,wptitle,created,updated,CASE WHEN source IS NULL THEN ref ELSE id END,cover,grade,creator))", {lang => $lang})->map }) =~ s/\\x\{([0-9A-F]+)\}/chr hex $1/ger;
+ my %filter = (lang => $lang);
+ my $cols = "ref, array_to_string(form || alt, '/'), prio, id, sub";
+ %rows = $db->select(_word => $cols, \%filter)->map_arrays;
+ defined $_->[-1] or pop @$_ for values %rows;
+ $rows{''} = [
+ (undef) x 3,
+ [$db->select(word => 'id', {cat => undef, ref => undef})->flat]
+ ];
+ say pp \%rows
+ =~ s/\\x\{([0-9A-F]+)\}/chr hex $1/ger;