mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-18 21:51:57 +00:00
16 lines
518 B
SQL
16 lines
518 B
SQL
drop table if exists t;
|
|
drop table if exists t_mv;
|
|
|
|
create table t (x UInt64) engine = MergeTree order by x;
|
|
create materialized view t_mv engine = MergeTree order by tuple() as select uniq(x), bitAnd(x, 255) as y from t group by y;
|
|
|
|
set max_bytes_before_external_group_by = 1000000000;
|
|
set group_by_two_level_threshold = 100;
|
|
set min_insert_block_size_rows = 100;
|
|
|
|
insert into t select number from numbers(300);
|
|
select count() from (select y from t_mv group by y);
|
|
|
|
drop table if exists t;
|
|
drop table if exists t_mv;
|