clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Eliminate min/max/any/anyLast of LowCardinality GROUP BY keys
- Allow creating a Distributed table over a table function
- Apply Iceberg schema evolution when compacting (OPTIMIZE)
- Session setting for passive mark cache usage (read-if-present, don't populate)
- Plain MergeTree retries merging a corrupted part indefinitely — validate checksums and detach the broken part after a corruption error (under a setting)
- How to gracefully shutdown service when systemctl stop will issue signal SIGKILL
- Warm statistics estimator on commit to avoid first-SELECT cold load
- arraySlice and arrayElement should work for QBit
- Detach broken parts after a failed merge in plain MergeTree (under a setting)
- [Bitmap] Function subBitmap execution result error
- Docs
- C++ not yet supported