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14 lines
777 B
MySQL
14 lines
777 B
MySQL
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drop table if exists z;
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create table z (pk Int64, d Date, id UInt64, c UInt64) Engine MergeTree partition by d order by pk ;
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insert into z select number, '2021-10-24', intDiv (number, 10000), 1 from numbers(1000000);
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optimize table z final;
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alter table z add projection pp (select id, sum(c) group by id);
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alter table z materialize projection pp settings mutations_sync=1;
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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;
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drop table z;
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