my $h=Data::Sync->new();
$h->source($sourcedbihandle,"select * from source");
$h->target($targetdbihandle,{index=>"MYPRIMKEY",
                        hashattributes=>[field1,field2]});
$h->mappings(field1=>'targetfield1',field2=>'targetfield2');
$h->transforms(targetfield1=>"s/(\w)+\s(\w+)/$2 $1/",
               targetfield2=>"lowercase");
$h->run;