clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- date_time_overflow_behavior setting silently ignored for all DateTime64/Time64 numeric casts due to hardcoded default_date_time_overflow_behavior in template instantiation
- Test reference file hardcodes database-dependent ZK paths, causing CI failure
- Add port_offset configuration parameter
- INDEX_NOT_USED error thrown when index may actually be used
- Wrong totals result with query_plan_merge_expressions disabled
- Add random projection functions for changing dimensionality of vector embeddings
- Allow creating table as table function with another engine
- Add arrayPermutations, arrayPartialPermutations, and arrayCombinations
- Add per-part aggregation cache for incremental GROUP BY
- `broken_parts == broken_parts_to_enqueue_fetches_on_loading` assertion in `ReplicatedMergeTreeQueue::createLogEntriesToFetchBrokenParts`
- Docs
- C++ not yet supported