mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-19 06:01:57 +00:00
15 lines
800 B
SQL
15 lines
800 B
SQL
-- Tags: no-s3-storage
|
|
drop table if exists z;
|
|
|
|
create table z (pk Int64, d Date, id UInt64, c UInt64) Engine MergeTree partition by d order by pk ;
|
|
|
|
insert into z select number, '2021-10-24', intDiv (number, 10000), 1 from numbers(1000000);
|
|
optimize table z final;
|
|
|
|
alter table z add projection pp (select id, sum(c) group by id);
|
|
alter table z materialize projection pp settings mutations_sync=1;
|
|
|
|
SELECT name, partition, formatReadableSize(sum(data_compressed_bytes) AS size) AS compressed, formatReadableSize(sum(data_uncompressed_bytes) AS usize) AS uncompressed, round(usize / size, 2) AS compr_rate, sum(rows) AS rows, count() AS part_count FROM system.projection_parts WHERE database = currentDatabase() and table = 'z' AND active GROUP BY name, partition ORDER BY size DESC;
|
|
|
|
drop table z;
|