clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Lazy-load column statistics during query planning
- vector_similarity default quantization (bf16) silently collapses vectors at magnitudes >>1, returns wrong nearest neighbours
- Flag `max_replicated_table_num_to_warn`
- Flaky test: 03710_parallel_alter_comment_rename_selects
- <lifetime> does not reload executable_pool UDFs when the underlying script changes
- Proposal: Integrate Blosc2, ZFP, and ZipNN as native compression codecs for numerical arrays
- Fix scale error in exception message of parseDateTime64InJodaSyntax
- fix(ci): Split the PromQL compliance comment hook into an isolated job because it requires GH auth.
- Add `UntrackedMemory` asynchronous metric
- fix ANY INNER JOIN with partial_merge
- Docs
- C++ not yet supported