clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- keeper-bench SIGABRTs on any request error: `std::abort` swallows the stop path
- Allow flattenable Tuple leaves to participate in Vertical merge
- DeltaLake CREATE with non-Parquet `format` commits unreadable data files
- DeltaLake CREATE accepts `Nullable(Tuple)`, then every NULL INSERT into it fails
- Support SQL SECURITY for TimeSeries tables and check access in their table functions
- `DROP TABLE ... ON CLUSTER ... SYNC` during a running `BACKUP` blocks the whole distributed DDL queue until the backup finishes, and is not killable on 25.8
- largestTriangleThreeBuckets rebuilds DateTime result from TypeIndex, losing the time zone
- `ttl_only_drop_parts`: a not-due column TTL blocks dropping fully expired parts
- pointwiseLess: an index absent from rhs is not zero, so negatives are dropped
- All-ones scalar multiply still drops an index whose product is zero
- Docs
- C++ not yet supported