clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- increase default limits on iceberg inserts and fix parquet settings
- Fix `DateTime64` Protobuf range and preserve subsecond precision
- optimize_aggregation_in_order over a mixed-direction sorting key (a, b DESC) collapses GROUP BY groups — silent wrong result
- WITH FILL ... INTERPOLATE with multiple outputs collapsing to one column: LOGICAL_ERROR on the old analyzer (enable_analyzer=0)
- Add experimental `Queue` table engine
- Support PromQL date/time functions called without arguments
- Fix lost parentheses for an INTERSECT/EXCEPT child of a UNION chain
- Reject importing foreign persisted block identities in cross-table partition adoption
- AST fuzzer: bound post-fuzz stages and detect a memory-stuck server
- Fix a data race on publication of per-user ProfileEvents counters
- Docs
- C++ not yet supported