clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix build flag with new detection mode.
- Backport #106507 to 26.3: Fix wrong-results equality with NaN-producing key function
- Optimize bucketed LowCardinality map reconstruction
- Enable `optimize_if_transform_strings_to_enum` by default
- Test: merge memory is not bounded by max_memory_usage (merge OOM repro)
- Automatic LowCardinality serialization based on uniq statistics
- Prune named-Tuple subfields whose values are all type-defaults at INSERT and merge
- Slightly optimize JSON typed paths default insertion during INSERT
- Read the smallest on-disk column when a query reads no columns
- Local-primary cloud-backed disk for MergeTree using ephemeral SSD plus object-storage mirror
- Docs
- C++ not yet supported