clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Unify `hash` and `parallel_hash` into a single join implementation
- CI: refuse LLVM coverage verdicts on incomplete measurements, make coverage profiles kill-safe
- Remove ci/tests (attempt 2)
- Do not re-read a partially cached segment's committed prefix from the source (in experimental reader executor)
- Take the Cascades sort limits from the plan, not the ambient context
- Avoid deep copy of AccessRights in getGrantQueriesImpl when it is only read
- PromQL histogram_count/histogram_sum over native histograms
- Assert what the build profile diff job's scheduling actually depends on
- Activate adaptive write buffers from the number of streams a wide part writes
- Fix NO_SUCH_DATA_PART when a distributed-plan worker prunes a coordinator-selected part
- Docs
- C++ not yet supported