clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Further improvements to hex/unhex
- `LowCardinality(String) = ''` rewrite to `empty()` breaks shard pruning
- Add immutable setting for MergeTree tables
- Resolve Paimon columns by field id so that data files written before a column rename or re-add are readable
- Kafka: Publishing to a Kafka table creates a new producer per INSERT
- SQL Console (/ui): "View Parameters" flyout cannot be dismissed and overrides "Row Details" and "Cell Inspector" on parameterized views
- Do not throw `NOT_IMPLEMENTED` in the external database `LIMIT` push-down check for a query with two `ARRAY JOIN`s
- Make planning of reads of many ALIAS columns linear in their number
- Do not throw `NOT_IMPLEMENTED` in the `numbers()`/`primes()` `LIMIT` hint for a query with two `ARRAY JOIN`s
- Check `SET profile` against the session constraints for users defined in the server config
- Docs
- C++ not yet supported