clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Short-circuit MergeTree analysis for empty PREWHERE sets
- Make background merges and mutations observe cancellation in the S3 retry loop
- Do not merge over a gap containing an outdated part with a higher mutation version
- Fix lost rows for a window function over a distributed table
- Fix out-of-bounds write on a long codec chain
- Check the query cancellation while filling `system.parts` and its siblings
- S3Queue: add failed_file_ttl_sec setting and SYSTEM DROP S3QUEUE FAILED FILES command (unordered mode)
- Verify settings possible range at the right place
- Fix `Files metadata is empty` logical error on the object storage queue read path
- Improve canceling mutations in CheckSortedTransform
- Docs
- C++ not yet supported