clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix LOGICAL_ERROR on premature S3 connection close through the filesystem cache
- Allow 'replicated' tables in replicated database
- Use `HashSet` for aggregations without aggregates
- Reject make_distributed_plan over a direct read from a text index
- Add test: `LIMIT ... WITH TIES` guard in `optimizeLimitForAggregationInOrder` is untested
- Reject correlated MATERIALIZED CTE reused in a JOIN at analysis time
- Support for google.protobuf.Timestamp serialisation to and from DateTime
- Fix wrong results for duplicate-ALIAS GROUP BY on a Distributed table under two-level aggregation
- Runner-wide OOM (OOM in dmesg / Server died) on Stateless test runners, especially arm_asan_ubsan, azure
- Detect when tables behind the query have changed - to improve query cache
- Docs
- C++ not yet supported