clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Disable omitting frame pointers for simpler unwind
- Obsolete settings warnings triggered by server-managed profiles even when value equals default
- segmentation tokenizer, which more suitable for log data search/patterns
- Feature: generateUUIDv3 / generateUUIDv5 (deterministic, namespaced, RFC-4122-compliant UUIDs)
- Feature request: `splitByRegexp` tokenizer for text indexes
- map_buckets_hash_strategy
- Backport #102825 to 26.3: normalizing format check using lower case
- MergeMutate pool permanently wedges on addFuturePartIfNotCoveredByThem
- PR's fix is incomplete: `replaceToConstants` (line 159) recurses into correlated subqueries unguarded, replacing ColumnNodes in `correlated_columns_list` with ConstantNodes, causing `Bad cast from type DB::ConstantNode to DB::ColumnNode` LOGICAL_ERROR
- Improve vector similarity search performance with binary quantization
- Docs
- C++ not yet supported