clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Arrow: unsupported-types-as-binary fallback crashes on JSON/Dynamic columns
- Allow JSONCompactEachRow to read a wrapping array of rows
- Add SYSTEM DROP SERIAL ID and SYSTEM RESET SERIAL ID
- Remove identity Expression steps from the query plan
- Parallelize `INTERSECT` and `EXCEPT`
- Paimon: pypaimon-written TIMESTAMP-partitioned tables are unreadable (partition directory spelling mismatch, raw STD_EXCEPTION)
- The `number_of_free_entries_in_pool_to_execute_mutation` function uses the built-in default value (20) for validation instead of correctly inheriting the global override value of `<merge_tree>` in `config.xml`
- Iceberg: stale open-time table UUID as metadata content cache key can serve a previous table's metadata
- Accept LowCardinality(UInt64) as a dictionary simple primary key
- Fix THERE_IS_NO_COLUMN for DISTINCT with an aggregate projection
- Docs
- C++ not yet supported