clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Default `join_algorithm = auto`
- [WIP] Part manifest prep - extract storage components
- Support GCS vended credentials in Unity Catalog
- Read zero-padded and `+`-signed integers in the TSV family, as CSV already does
- Filter push-down of a column-free WHERE conjunct breaks forced join_algorithm='direct' with NOT_IMPLEMENTED
- Direct `Map` subcolumn reads (`m.keys` / `m.values`) from Parquet silently return default values
- Minmax index incorrectly prunes fractional DateTime64 values for integer bounds
- Do not resolve parallel-replicas callbacks from the context when cloning a read
- Do not throw when comparing an Enum column with a non-member string literal
- Fix wrong statistics part pruning for negated float predicates with NaN
- Docs
- C++ not yet supported