clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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Help out
- Issues
- Add column allowlist/denylist settings for automatic statistics
- optimize_skip_unused_shards duplicates every group of a distributed self-join on an expression sharding key
- Use Silk fibers in QueryRunner
- `ALTER TABLE ... FREEZE` snapshot is never fsynced: power loss silently erases the acknowledged snapshot (only `shadow/increment.txt` survives)
- CI: protect client-owned documentation folders
- Enable join fixed hash table under spilling wrapper and with mismatched key types
- Fix logical error in AND compare/notEquals chain on a NULL-valued constant
- Fsync DETACH TABLE ... PERMANENTLY flag to survive power loss
- Fsync detached directory on DROP DETACHED PART/PARTITION
- Fsync restored part files on RESTORE to survive power loss
- Docs
- C++ not yet supported