clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Outer join support inequality-only conditions as cross join
- Unknown identifier when `enable_identifier_resolve_cache` is disabled
- Assign merges for all partitions at once for OPTIMIZE FINAL
- Flaky test: 02669_alter_modify_to_nullable (ALTER MODIFY -> Nullable metadata-only optimization falls back to full rewrite)
- Flaky test_async_load_databases materialized_views tests on 25.8 (missing backport of #88573)
- Projection parts ignore `RECOMPRESS` TTL codec and are always written with the default codec
- [LOGICAL_ERROR] "Having zero bytes, but range is not finished" on premature S3 connection close through the filesystem cache
- Follow up azure changes
- Logical error: Bad cast from type A to B (STID: 3721-40ef)
- Fix logical error with correlated EXISTS and convert_query_to_cnf
- Docs
- C++ not yet supported