clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Empty result when using TTL GROUP BY with SET using any aggregation with a different column
- User defined function is executed for values that are not in the query by WHERE condition
- Delta Kernel very slow compared to _path declaration
- query_plan_join_shard_by_pk_ranges doesnt work with FINAL
- A new system table, `changelog`
- Smarter Dictionary Updates and LRU-based Caching
- Add TTL DELETE stats: next selection time for each partition
- short-circuit in SELECT OR/AND clause
- MongoDB: support DateTime64 in WHERE clause
- ULID binary conversion functions
- Docs
- C++ not yet supported