clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Capturing Group Change Events in Materialized View (Kafka Streamed User Updates)
- increased query latency, page faults in new version
- Refreshable materialized view: apply RANDOMIZE FOR on each replica independently
- Iceberg engine assumes filepaths instead of reading it from the metadata files correctly
- Proposal: Investigate the Integration of Unchained Hash Table Design for Join Processing in ClickHouse
- Support Multilevel Dot-Notation Nesting
- `CREATE TABLE ON CLUSTER` ignores cluster default database (but `DROP TABLE` doesn't)
- Fix: ORDER BY ... WITH FILL on aliased column
- Possible regression on Distributed plan with bool
- Remote parameterized view data selection
- Docs
- C++ not yet supported