SELECT length(groupArray(number)), count() FROM (SELECT number FROM system.numbers_mt LIMIT 1000000); SELECT groupArray(dummy), count() FROM remote('127.0.0.{1,2}', system.one); SELECT length(groupArray(toString(number))), count() FROM (SELECT number FROM system.numbers LIMIT 100000); SELECT groupArray(toString(dummy)), count() FROM remote('127.0.0.{1,2}', system.one);