clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix dangling remote host filter references in S3 client configurations
- Fix `Not-ready Set` when a one-block system table filters on an `IN` subquery
- Do not overflow the stack when traversing a deep query tree
- ReplicatedMergeTree: acked lightweight UPDATE on a renamed column is silently invisible while the RENAME COLUMN mutation is still pending
- Add SQL-managed CREATE/ALTER/DROP CLUSTER
- Native geometry functions have no single declaration of their accepted argument domain, and disagree on when an unaccepted argument is rejected
- ALTER TABLE ... DELETE on a Join-engine table is not crash-atomic: a server kill during the mutation silently loses acked rows the DELETE never matched
- Add the system.changelog table
- allow_window_partitions_independently splits a logical window partition when the window key uses toString(DateTime) or toFixedString: the disjointness proof trusts false isInjective claims
- IEJoin returns wrong rows for FixedString vs String inequality join keys at default settings: the injected CAST strips NUL padding and diverges from comparison semantics
- Docs
- C++ not yet supported