select 1
select 2
count
/opt/local/lib/ruby/gems/1.8/gems/activegroonga-2.1.1/lib/active_groonga/result_set.rb:173:in `instantiate': undefined method `table' for "\001\000\000\000":String (NoMethodError)
	from /opt/local/lib/ruby/gems/1.8/gems/activegroonga-2.1.1/lib/active_groonga/result_set.rb:171:in `times'
	from /opt/local/lib/ruby/gems/1.8/gems/activegroonga-2.1.1/lib/active_groonga/result_set.rb:171:in `instantiate'
	from /opt/local/lib/ruby/gems/1.8/gems/activegroonga-2.1.1/lib/active_groonga/result_set.rb:154:in `each'
	from /opt/local/lib/ruby/gems/1.8/gems/activegroonga-2.1.1/lib/active_groonga/result_set.rb:153:in `each'
	from foo.rb:31:in `count'
	from foo.rb:31
