-- Tags: distributed set allow_experimental_parallel_reading_from_replicas = 0; drop table if exists sample_final; create table sample_final (CounterID UInt32, EventDate Date, EventTime DateTime, UserID UInt64, Sign Int8) engine = CollapsingMergeTree(Sign) order by (CounterID, EventDate, intHash32(UserID), EventTime) sample by intHash32(UserID) SETTINGS index_granularity = 8192, index_granularity_bytes = '10Mi'; insert into sample_final select number / (8192 * 4), toDate('2019-01-01'), toDateTime('2019-01-01 00:00:01') + number, number / (8192 * 2), number % 3 = 1 ? -1 : 1 from numbers(1000000); select 'count'; select count() from sample_final; select 'count final'; select count() from sample_final final; select 'count sample'; select count() from sample_final sample 1/2; select 'count sample final'; select count() from sample_final final sample 1/2; select 'count final max_parallel_replicas'; set max_parallel_replicas=2; select count() from remote('127.0.0.{2|3}', currentDatabase(), sample_final) final; drop table if exists sample_final;