clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Honour query cancellation while waiting for a cache dictionary update
- Do not delete an already-published backup when BACKUP finalization fails
- Enforce parent table row policy in mergeTreeProjection table function
- Build the PREWHERE plan once per read pool instead of once per part
- Fix CREATE TABLE on a KeeperMap path racing a concurrent drop
- Fix a mutated part losing files to the temporary directory cleanup
- Merge table over Distributed + JOIN + LIMIT n WITH TIES: the shard fragment keeps WITH TIES but drops ORDER BY, fails with WITH_TIES_WITHOUT_ORDER_BY
- Cap JSON String column buffer growth to reduce INSERT peak memory
- Shrink over-allocated columns on INSERT to reduce peak memory
- Fix server abort on empty BUFFERED_V1 WASM UDF result
- Docs
- C++ not yet supported