clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- group by grouping sets() is slower than union all two group by results
- WITH TOTALS performance
- Bloom filter text indexes support Nullable types.
- Webhooks/Triggers for Realtime Events
- Iceberg unable to read column with name includes special characters
- When querying distributed table subquery using allow_experimental_analyzer, where conditions cannot be pushed down
- Enable dynamic evaluation of whether a short-circuit function's argument should be lazily executed
- old partitions/folders not getting deleted
- Better enum string operation implementation
- Unexpected behaviour in experimental refreshable materialized view
- Docs
- C++ not yet supported