clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- feat: support `system.connections` table for client connections metadata
- Add fuzz targets for compression codecs, NativeReader, DataTypes, and WASM
- Fix cancelation of mutation task after `KILL MUTATION`
- Auto-enable uncompressed cache for MergeTree reads
- Add replacing_merge_cleanup_period_seconds experimental setting for ReplacingMergeTree
- Support `OVERLAPS` predicate for time period comparison
- Add setting to make `CAST(NULL AS type)` return a typed NULL instead of the type's default value
- Support `SIMILAR TO` pattern matching predicate
- Support `UNIQUE(subquery)` predicate that tests for no duplicate rows
- Support `MATCH` predicate for referential integrity checks in queries
- Docs
- C++ not yet supported