clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Backport #106682 to 26.3: Reject input() referenced more than once via CTE inlining
- RBAC: mutations with subqueries bypass SELECT checks when validate_mutation_query=0
- ALTER NAMED COLLECTION changes are not picked up by Kafka engine tables without DETACH/ATTACH
- Enable lazy materialization with patch parts
- Logical error 'txn' in ImplicitTransactionControlExecutor::commit on cancelled implicit-transaction query
- Make CPU-bound `work()` interruptible: large single chunks block `KILL QUERY` / timeouts
- Logical error: 'current_version != existing_version' (STID: 2508-3ef8)
- Add `query-analyzer` util for profiling query analysis
- Improve text index condition description in `EXPLAIN`
- Keeper: SIGABRT (LOGICAL_ERROR in commit_in_bg) on every reconfig+restart during quorum migration on 25.8 — regression of #72234?
- Docs
- C++ not yet supported