clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add ALP RD Codec Variant
- Fix/interserver mode before secret hash bug
- Fix cancelation of mutation task after `KILL MUTATION`
- Auto-enable uncompressed cache for MergeTree reads
- Add output format float precision setting
- Add replacing_merge_cleanup_period_seconds experimental setting for ReplacingMergeTree
- Npy format: negative shape dimension causes infinite loop
- Add setting to make `||` / `concat()` propagate NULL instead of treating it as empty string
- Support `UNIQUE(subquery)` predicate that tests for no duplicate rows
- Support `MATCH` predicate for referential integrity checks in queries
- Docs
- C++ not yet supported