Net::HandlerSocket3pm

  use Net::HandlerSocket;
  my $hsargs = { host => 'localhost', port => 9999 };
  my $cli = new Net::HandlerSocket($hsargs);
  $cli->open_index(1, 'testdb', 'testtable1', 'PRIMARY', 'foo,bar,baz');
  $cli->open_index(2, 'testdb', 'testtable2', 'i2', 'hoge,fuga');
  $cli->execute_find(1, '>=', [ 'aaa', 'bbb' ], 5, 100);
        # select foo,bar,baz from testdb.testtable1
        #       where pk1 = 'aaa' and pk2 = 'bbb' order by pk1, pk2
        #       limit 100, 5