clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Logical error: 'Part -2_0_26_2_47 with metadata version 13 contains column h that is absent in table test with metadata version 12'.
- `optimize_read_in_order` no longer works with Merge table engine
- Parsing Decimal from String with proper rounding
- Error during data insertion into kafka table
- Add an option to support TTL clause for Redis engine
- Consider about make ClickHouse as "memory database"
- The query speed of clickhouse version 24.7.2.13 is much slower than version 23.11.3.23
- Continuous profiling: queries and flamegraphs
- Analyzer: Try to fix GROUP BY optimization with group_by_use_nulls
- Azure: very slow writing leads to flaky tests (lack of agressive retries for azure)
- Docs
- C++ not yet supported