clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Implement dynamic dispatch for StringSearcher
- Occurs error when (I)LIKE doesn't support search with-non-constant needles in constant haystack when left side is constant
- MATERIALIZE PROJECTION sometimes may require a lot of ram
- Problems with MaterializedPostgreSQL to Neon (LakeBase)
- Clarity Around CoalescingMergeTree And Nullable Columns
- A number of merge events is inflated
- ClickHouseMetrics_VersionInteger metric in http://nameVM:9363/metrics does not show the version for clickhouse-keeper
- Async CPU metrics values are unexpected after upgrading to ClickHouse 25.5.x
- Query condition cache on disk
- Better support for nested columns
- Docs
- C++ not yet supported