clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Stabilize storage memory checkpoints and report unfiltered allocations
- Pooled native connections stay on a reused IP after the target host's DNS record changes, so Distributed queries read the wrong shard
- Unify different Geo types into Geometry in getLeastSupertype
- `max_result_rows` / `max_result_bytes` are not enforced for queries without `FROM` (or with `FROM system.one`)
- Allow --queries-file together with --query in clickhouse-local and client
- Count only ClickHouse processes in the oom_reaper lines of the dmesg OOM checks
- Cherry pick #128519 to 26.10: Sort-order-aware join ordering in DPsub (interesting orders)
- Extend BLAKE3 support with keyed hashing (BLAKE3Keyed), key derivation (BLAKE3DeriveKey), and custom output length (XOF)
- Fix flaky test `05320_ttl_merge_not_postponed_when_merge_pool_full`
- Skip comment lines in CSV and TSV input
- Docs
- C++ not yet supported