clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Backport #128824 to 26.10: Fix use-after-free of the Replicated database DDL worker
- Use dynamic rebucketing for GraceHash
- Bind `ssh_key` native-protocol authentication to the TLS session
- Document access rights of the `Merge` table engine and the `merge` table function
- Make the `ALP` codec GA
- One-row async inserts flush 5-7x slower than a single insert of the same rows
- Adaptive async inserts add ~50 ms to every insert of a sequential client when inserts are less than 200 ms apart
- Run amd_asan_ubsan db disk integration tests on amd-large
- Share the values of a sparse column filtered by its own non-default rows in `PREWHERE`
- Backport #126232 to 26.10: Fix outer JOIN rewrites dropping rows when the WHERE uses `isConstant` on a joined column
- Docs
- C++ not yet supported