create table if not exists sample_prewhere (date Date, id Int32, time Int64) engine = MergeTree partition by date order by (id, time, intHash64(time)) sample by intHash64(time); insert into sample_prewhere values ('2019-01-01', 2, toDateTime('2019-07-20 00:00:01')); insert into sample_prewhere values ('2019-01-01', 1, toDateTime('2019-07-20 00:00:02')); insert into sample_prewhere values ('2019-01-02', 3, toDateTime('2019-07-20 00:00:03')); select id from remote('127.0.0.{1,3}', currentDatabase(), sample_prewhere) SAMPLE 1 where toDateTime(time) = '2019-07-20 00:00:00'; drop table sample_prewhere;