clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Imprecise sizes shown by playground console
- Populate `system.exports` with all exports, including scheduled ones
- Test 01079_parallel_alter_detach_table_zookeeper is flaky
- keeper empty node breaks the cluster.
- Frequent RECEIVED_EMPTY_DATA during background merges since updating to 25.11, may be caused by lightweight DELETE
- [RFC] Unified tracing with SQL-based processing
- Improvements to processing disjunctions with skip indexes (post PR #87781)
- Position deletes incorrect result
- More geo functions: centroid, bounding box
- `clickhouse-local` shows zero CPU usage in the progress bar while converting a Parquet file
- Docs
- C++ not yet supported