clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- continuous interserver 'I/O error: Broken pipe'
- Wrong results of SELECT DISTINCT statement when comparing 0 and -0
- A peephole optimization: if someone requesting a tuple of attributes from a dictionary and immediately takes only one, don't request others.
- `dictGet` functions from complex key dictionaries require `tuple` argument even if there is a single key
- HTTP dictionary doesn't work as described in docs
- Async insert high cpu usage on clickhouse-server when there's 40 thread inserting at the same time
- SFPD incidents dataset
- Disk appears as active after TTL delete triggers.
- system.table_engines
- Transform rhs of IN when lhs is sub-expression of primary key during key condition analysis
- Docs
- C++ not yet supported