clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Preserve existing parameters in groupConcat two-argument form
- RFC: per-query cancellation event hub; faster, more uniform cancellation across the codebase
- Fix data loss in REPLACE PARTITION from a source with no parts (#23727)
- Allow KILL QUERY/MUTATION SELECT to return multiple blocks
- Make `finished_mutations_to_keep=0` mean "keep no finished mutations"
- Restrict user-controllable S3 credential resolution
- Enforce ColumnConstPr in ActionsDAG
- `supportsDelete` in `DataLakeConfiguration` throws `LOGICAL_ERROR` on freshly-attached data lake table with uninitialized metadata
- Fix `Metadata is not initialized` on `DELETE FROM` for data lakes
- Fix LOGICAL_ERROR for materialized CTE under serialize_query_plan + parallel replicas
- Docs
- C++ not yet supported