clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `WHERE field` does not use PK or data skipping indices
- Add IPV4_PREFIX_BITS and IPV6_PREFIX_BITS options to `keyed_by_ip`
- Add support to use column key as condition in `WHERE` FIELD
- Check performance with x86-64-v3
- Support read in order for complex functions
- Introduce unicode_word tokenizer and refactor tokenization to foreach-callback API
- Distributed table with cityHash64(vin) incorrectly skips the shard when optimize_skip_unused_shards is enabled
- Hard and soft limit settings for access entities
- Corrects the metadata of normal projections
- Follow up work for top-K query processing (PR #89835)
- Docs
- C++ not yet supported