clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Support date-and-time string literals in IN for Date columns
- Enforce per-query temporary data limits on join spill and deserialized aggregation plans
- Partial MergeTree statistics can be consumed as a complete optimizer scope
- Avoid building unused full-column serializations in MergeTree readers
- Stress tests: `Cannot start clickhouse-server` — corrupted `txn_version.txt` of fabricated parts from `04241_part_loading_tree_rollback_*` tests
- Normalize the aggregation size hint by the recorded table count
- Preserve const result for `replicate`
- Fix NOT_IMPLEMENTED for correlated subqueries when join_algorithm lacks hash
- Keeper killing active sessions for read-only workloads
- https://packages.clickhouse.com/deb/dists/stable/main/binary-amd64/Packages.gz seems to have trailing garbage data
- Docs
- C++ not yet supported