clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Improve selective reads for positional text formats
- [RFC] Top-K Search Infrastructure
- Add `SCHEME 'BEARER'` to `<http_authentication_servers>` for delegated token verification
- Adding RowBinaryWithNamesAndTypesAndDefaults
- Signal description: Segmentation fault
- Fix Keeper config restore after compacted rollback
- Fix `Template` recovery after skipped bad rows
- `DB::finalizeChunk` mutates `ColumnAggregateFunction` columns while still aliased by downstream stages / threads — root cause for #102460 (caught by TSan / ASan / MSan)
- SEGV in `UniquesHashSet::merge` ← `ColumnAggregateFunction::ensureOwnership` ← `MergeSorter::mergeBatchImpl` when sorting aggregate-state column from `WITH ROLLUP WITH TOTALS` (5-line standalone repro)
- Bound prefetch look-ahead by key_end in Aggregator when all keys are const
- Docs
- C++ not yet supported