clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Wrong results: partition pruning drops rows for `modulo` over mixed-sign
- tzdata 2026c backport to 26.3 / 26.8 (and better to bump to 2026d)
- Backport #117981 to 26.7: Do not terminate the server on retryable errors while loading outdated parts
- Backport #117981 to 26.8: Do not terminate the server on retryable errors while loading outdated parts
- Backport #117981 to 26.9: Do not terminate the server on retryable errors while loading outdated parts
- Add test: Absent-column skip for a part ahead of a `MergeTree` table is untested
- Add test: No test has a table with both mrk3 and mrk4 Compact parts reading subcolumns
- Cherry pick #118496 to 26.7: Fix a text index direct read silently returning no rows while an update is pending
- Backport #118496 to 26.8: Fix a text index direct read silently returning no rows while an update is pending
- Backport #108993 to 26.3: Fix flaky test_backup_restore_on_cluster restore timeout
- Docs
- C++ not yet supported