clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- The optimization for v23.6 leads to problems with using StorageJoin tables
- kurtSamp & skewSamp return non commonly expected result (scipy)
- Selecting from distributed engine from inconsistent replicas
- Nodes with `always_fetch_merge_parts=1` using significant CPU (25 core+) while waiting for remote merges to complete
- Query from StorageEmbeddedRocksDB returns wrong result when key is Float
- Support schema inference for Mongo functions
- Support Mongo types
- Range based object store iterators (instead of prefix based)
- Possible optimization: skip reading primary index columns based on index analysis
- Request to Add `CTRL+DEL` Word Deletion Feature in ClickHouse Client
- Docs
- C++ not yet supported