clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Correlated subqueries cannot handle null-safe comparisons correctly
- FROM table column alias not working with EXCEPT and INTERSECT queries
- `03285_materialize_ttl_only_drop_parts` is flaky
- Speed up consistency check during loading of tables with lots of files inside data parts.
- FPC Codec does not persist float_size in table metadata
- 03633_set_index_bulk_filtering is flaky
- Unexpected `DB::Exception: User memory limit exceeded` for distributed queries with multiple users.
- Release pull request for branch 25.11
- Introduce `STALENESS` for Iceberg engine
- Read only db created with backup engine has cross dependencies with the original dB if created on same server.
- Docs
- C++ not yet supported