clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix exceptions and wrong results of `IN` with `Nullable(Tuple)` and `DateTime64` keys
- Perf(JOIN): Reuse consecutive HashJoin probe results for fixed-width keys
- Add histogramExplicit and histogramExplicitOpenClosed aggregate functions
- Faster implementation of function `extractKeyValuePairs`
- Fix `SELECT * REPLACE`/`APPLY` and positional arguments with `group_by_use_nulls`
- Create IcebergRESTCatalogHandler [1/n]
- Report INCORRECT_DATA instead of LOGICAL_ERROR when a part does not match the declared sorting key
- Do not merge patch parts across the data version of an in-flight merge or mutation
- Fix text and token skip indexes over-pruning a map element whose default matches the predicate
- [TEST] Read time series table functions on parallel replicas
- Docs
- C++ not yet supported