clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Logical error when inserting data into distributed table with `select from s3Cluster(...)` table function
- Hierarchical Skip Indexes
- Partition pruning with deltaLakeCluster not working through view or cte
- Integration tests: setup cluster dependencies in parallel
- GROUP BY ALL started consuming much more RAM
- Query condition cache does not handle prewhere properly
- Apply TTL on the fly
- optimize_functions_to_subcolumns leads to incorrect result for ALIAS columns
- [CI crash] PipelineExecutor failed during finalizeExecution
- Deduplication issues with INSERT ... SELECT
- Docs
- C++ not yet supported