clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Use Rust `nightly-2026-11-02`
- Fix use-after-free of the Replicated database DDL worker
- Exclude trace processing from allocation sampling
- Use explicit vector accumulators in `isAllASCII`
- Fix memory-safety bugs in the self-extracting decompressor
- Refreshable materialized view reading a database-qualified parameterized view into a ReplicatedMergeTree table fails with UNKNOWN_FUNCTION
- Hot-increasing background_message_broker_schedule_pool_size leaves Kafka task concurrency capped at the initial pool size
- Keeper: hand leadership over to a follower on shutdown
- Use `hash_join_layout` in the performance tests and stop treating the `parallel_hash_join_threshold` extremes as layout switches
- Honour the upstream `ci-relocation-headroom-ok` label in private sync PRs
- Docs
- C++ not yet supported