clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Isolate streaming queries background jobs into the dedicated pool
- Fix `JSONExtractRaw` and `JSONHas` for typed JSON paths with default values
- HashJoin probe: rows==1 fast path
- Parquet: map TIME logical type to Time64
- Push down namespace filter to DataLake catalogs in SHOW TABLES
- Constant filter folding under materialize
- Test set skip index OR with LowCardinality(Nullable) (issue #105938)
- DeltaLake : Use new create table transaction
- Avro: map TIME_MILLIS / TIME_MICROS to ClickHouse Time64
- Fix `Coordination mode mismatch` when same table is read in multiple modes
- Docs
- C++ not yet supported