clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Unexpected Out-of-Order Results from Merge Table Query
- Handle ReplicatedMT table metadata_version properly on BACKUP, RESTORE
- Fix data race in ReplicatedMergeTreeQueue and using TSA
- [CI crash] HashJoin transform failed during block structure check
- Add early short-circuit evaluation for OR/AND in new analyzer to prevent unnecessary scalar subquery execution
- Add conversion_time mode to windowFunnel
- Update ReadHelpers.h (parse small decimal timestamps correctly)
- Add skip indexes to query log
- Cherry pick #91553 to 25.11: Fix crash in a single-node cluster when reading from Iceberg in split-by-buckets mode
- Implement LeaNN hub node pruning for vector similarity index
- Docs
- C++ not yet supported