my @colnames        = $result_source->columns;
my $upd_code_with_history = sub {
   # Step 1: make a copy of all active rows, but set them inactive
   # these become the history rows

   # Now build the "insert ... select" statement
   # First, build column list for INSERT
   my $insert_cols = join ',',@colnames;    

   # build SELECT col-list with  'is_active' = 0 as not active
   foreach my $col (@colnames) { 
      if ($col =~ /is_active$/) { 
         # replace column name with constant
         $col = '0';       # is reference, change in-place
         last;
      } 
   }

   # create the SQL Select part
   $key{is_active} = 1;     # select all active rows
   my $rsi = $resultset->search(\%key, {select => \@colnames });
   # as_query returns the generated SQL-Statemant and  @params 
   # in correct order.
   my ($select_sql,@params) = @{ ${$rsi->as_query} };
   my $table                = $rsi->result_source->from;

   # now put all tohether
   my $insert_sql = "INSERT INTO $table ($insert_cols) $select_sql";

   # This insert copies all '1' and replaces them with '0'            
   my @stuff = $db_schema->storage->dbh_do(
        sub {
           my ($storage, $dbh, $sql, @bndval) = @_;
           if ($self->config->{debug_sql}) {
               print STDERR $sql, ": '", join("', '", @bndval), "'\n";
           }
           $dbh->do($sql, undef, @bndval);
       },
       # see above for @param structure
       $insert_sql, map { $_->[1] } @params  
   );
            
   # Step 2: Update all '1' elements with current timestamp and values
   # This will be the current rows            
   # $key{elt_aktiv_mm} = 1;        # still set
   $values->{timestamp_col} = \['CURRENT TIMESTAMP'];

   # now update all '1'-rows with the values
   my $rss = $resultset->search(\%key)->update($values);
}; # end Coderef $upd_code