clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Inconsistent results on dictionary operations and reload
- Fix memory tracker leak when a parent tracker throws MEMORY_LIMIT_EXCEEDED
- `count()` (and other array-element-independent queries) over `ARRAY JOIN` reads the whole array instead of the `size0` subcolumn
- Revert "#110192: Fix indexHint/ignore/isZeroOrNull declared return type for Nothing arguments"
- Bad validation on unique key table on attach
- Revert some changes from #109105, add performance test that shows the degradation.
- Add IPv4/IPv6 auto-inference for JSON shared data insertion
- Add `aiSimilarity` function
- ClickHouse memory is not being released.
- Encode nulls-action variant in -Tuple aggregate state type name
- Docs
- C++ not yet supported