clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Merge over lazily loaded child ignores share_nested_offsets = 0
- `IN` with NULL inside `Array(Nullable)` set fails bloom_filter index analysis
- KQL Boolean conversion prevents primary-key pruning
- Feat(Array): Add `arrayIsSorted` function
- Skip the identity `accurateOrNull` cast in `Set::execute`
- Pre-fix dirs still hide tables when first opened with another `default_database`
- CNF inverts a negated `GROUP BY` key in `HAVING`: `NOT_FOUND_COLUMN_IN_BLOCK`
- CNF reduce drops contradictory filter as TRUE instead of FALSE
- Update the zstd fork and evaluate the pending upstream decompression work
- topKThroughJoin probe plans Merge children excluded by _table filter
- Docs
- C++ not yet supported