clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix flaky cancel_insert_when_client_dies tests on fast builds
- Add `max_rows` setting for databases
- Stress test: S3_ERROR "No such key" during background merge on cached_s3_encrypted (foreground merge-read variant, not covered by #108489)
- Fix materialized CTE "gate is missing" error with WITH TOTALS
- [wip] Implementing band join algorithm
- Automatic parallel replicas (parallel_replicas_min_number_of_rows_per_replica > 0) fails RIGHT JOIN with NOT_FOUND_COLUMN_IN_BLOCK
- rewrite_in_to_join produces a join full_sorting_merge/partial_merge cannot execute: valid IN (subquery) throws NOT_IMPLEMENTED with optimizations on
- ORDER BY is not applied globally when reading a Distributed table through a Merge engine: per-shard-sorted streams are concatenated, LIMIT returns wrong rows
- WITH FILL is applied per shard on Distributed tables: fill rows are duplicated once per shard
- Testing: verify server stacktrace log attachment with an artificial hung test (on top of brew lldb fix)
- Docs
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