clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Potential wrong ANY JOIN query
- clickhouse-client exits code 0 on query timeout
- Change defaults for settings allow_concurrent_backups & allow_concurrent_restore to false
- Parquet writer overflow with DateTime64
- Improve `system.clusters` table performance
- Add setting to limit parallel processes for refreshable materialized views
- GROUPING function argument is not in GROUP BY keys for typles with enable_analyzer=1
- Parallel replicas: a mode with no localhost preference, when even a query with max_parallel_replicas = 1 can be directed to another host
- `max_subquery_depth` setting is weird with `GLOBAL IN` and `enable_analyzer = 1`
- ReplacingMT/CollapsingMT: Insert if not exists
- Docs
- C++ not yet supported