clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Support Variant type in aggregate functions (sum, avg, min, max, ...)
- Size parallel replicas mark_segment_size by active replica count
- Fix EmbeddedRocksDB backup to include table data
- EmbeddedRocksDB backup does not include data files; only metadata is created
- Optimize code path for LowCardinality columns in CountMin
- feat: bound replicated merge selection by partition batches
- Fix INNER JOIN cardinality underestimation in join reorder optimizer
- Ground tables JOIN optimization
- remove parenthesis from single EXCEPT column in except_modifier.md
- enable analyzer_compatibility_prefer_alias_over_subcolumn
- Docs
- C++ not yet supported