clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- SYNTAX_ERROR when using GRANT with wildcard on 25.3
- use_query_condition_cache does not work with relative time filters like now()
- Some mutations can’t be cancelled during execution, causing potential replication issues
- query_plan_join_swap_table doesn't perform as expected with WHERE
- _sample_factor missing column in mutation
- EPHEMERAL column incompatible with JSONExtractString + CAST in materialized column
- 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
- Docs
- C++ not yet supported