clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Introduce Settings Compatibility Blocker
- Physical column shadowing `_part`: `SELECT count() ... WHERE isNull(_part > 0)` throws NOT_FOUND_COLUMN_IN_BLOCK
- Docs: Improve Reference documentation discovery
- Advance the Iceberg version hint on a lost commit race
- HTTP gzip ingest in 26.7 is O(n^2) in compressed block size
- Add `system.sessions` table and `KILL SESSION` to manage sessions
- Build the row policy's IN-subquery sets when reading a `Merge` table
- Do not deduplicate an insert when its deduplication node is gone from Keeper
- Cancellation of a PostgreSQL read is lost if the cancel reaches the backend before the `COPY` starts executing
- Do not destroy a foreign detached part when cloning one from another shard
- Docs
- C++ not yet supported