clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `http_receive_timeout=0` causes connection failures despite docs claiming it means "infinite timeout"
- Add support for CONNECT_ATTRS and SESSION_TRACK MySQL connection features
- Logical error: Can't extract iceberg table state from storage snapshot for table location
- Iceberg bad ORDER BY SEGV
- `DataLakeCatalog()` with Polaris REST catalog duplicates S3 path prefix causing 404 errors
- Flaky test: 01882_check_max_parts_to_merge_at_once
- More profile metrics for Iceberg, S3 and Azure
- Flaky test: test_ttl_move/test.py::TestCancelBackgroundMoving::test_cancel_background_moving_on_stop_moves_query
- A query does not work with parallel replicas (Unknown expression or function identifier)
- Implement iceberg metadata cache for using last modify time
- Docs
- C++ not yet supported