p @connection.execute("SHOW GLOBAL VARIABLES LIKE 'innodb_lock_wait_timeout'")
#<Mysql2::Result:0x007fd6801a4240 @query_options={:as=>:array, :async=>false, :cast_booleans=>false, :symbolize_keys=>false, :database_timezone=>:local, :application_timezone=>nil, :cache_rows=>true, :connect_flags=>-2147442171, :cast=>true, :adapter=>"mysql2", :host=>"127.0.0.1", :database=>"lhm", :username=>"root", :port=>3306, :flags=>2}>