mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-17 20:02:05 +00:00
10 lines
447 B
MySQL
10 lines
447 B
MySQL
|
drop table if exists t;
|
||
|
|
|
||
|
|
create table t (x UInt32) engine = MergeTree order by tuple() settings index_granularity = 8;
|
||
|
|
insert into t select number from numbers(100);
|
||
|
|
alter table t add projection p (select uniqHLL12(x));
|
||
|
|
insert into t select number + 100 from numbers(100);
|
||
|
|
select uniqHLL12(x) from t settings allow_experimental_projection_optimization = 1, max_bytes_to_read=400, max_block_size=8; -- { serverError 307; }
|
||
|
|
|
||
|
|
drop table if exists t;
|