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ClickHouse® is a real-time analytics DBMS
dc6847d5c6
Here is a reproducible test case. ``` create table e (s UInt64, t UInt64) Engine = Memory; create table v (s UInt64, w Float64, c UInt64) Engine = Join(Any, Inner, s); insert into e values (1, 2), (1, 3), (1, 4), (2, 1), (2, 4), (3, 1), (4, 2), (4, 3); insert into v values (1, 0.5, 3), (2, 0.5, 2), (3, 1, 1), (4, 0.5, 2); select *, w, c from e any inner join v using (s); ``` # before this patch ``` ┌─s─┬─t─┬─────w─┬──────────c─┐ │ 1 │ 2 │ 4e-45 │ 1051372192 │ │ 1 │ 3 │ 4e-45 │ 1051372192 │ │ 1 │ 4 │ 4e-45 │ 1051372192 │ │ 2 │ 1 │ 3e-45 │ 1056964608 │ │ 2 │ 4 │ 3e-45 │ 1056964608 │ │ 3 │ 1 │ 1e-45 │ 1065353216 │ │ 4 │ 2 │ 3e-45 │ 1056964608 │ │ 4 │ 3 │ 3e-45 │ 1056964608 │ └───┴───┴───────┴────────────┘ ``` # after this patch ``` ┌─s─┬─t─┬───w─┬─c─┐ │ 1 │ 2 │ 0.5 │ 3 │ │ 1 │ 3 │ 0.5 │ 3 │ │ 1 │ 4 │ 0.5 │ 3 │ │ 2 │ 1 │ 0.5 │ 2 │ │ 2 │ 4 │ 0.5 │ 2 │ │ 3 │ 1 │ 1 │ 1 │ │ 4 │ 2 │ 0.5 │ 2 │ │ 4 │ 3 │ 0.5 │ 2 │ └───┴───┴─────┴───┘ ``` |
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| MacOS.md | ||
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ClickHouse is an open-source column-oriented database management system that allows generating analytical data reports in real time.