clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix input-order dependency in windowFunnel with strict_deduplication and strict_once
- Delta lake data files prefetch
- make transaction commit wait killable
- Prevent background overlay from intercepting quickstart cards
- Fix on-fly reads failing while a pending mutation reads an `ALIAS` column
- Fix lost rows and wrong defaults when reading a `Buffer` column its destination lacks
- Speed up Kafka ingestion of single-row ProtobufSingle (~13x) and JSONEachRow (~5x) messages
- Improve Bloom-filter pruning for wrapped `arrayJoin` IN predicates
- Do not forward a Merge destination's processing stage across an order-breaking type conversion in a Buffer or a materialized view
- Check for query cancellation while the analyzer hashes query trees
- Docs
- C++ not yet supported