clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- BACKUP of a Distributed table silently omits the pending on-disk insert queue: acknowledged rows a graceful restart delivers are lost after RESTORE
- `T64('bit')` writes all-zero planes for 8-bit `UInt8` blocks in `amd_release`
- `distributed_ddl_use_initial_user_and_roles` does not preserve current roles and authentication restrictions of the initiator
- `compatibility` after `profile` overwrites a setting pinned before it
- EXPLAIN ANALYZE overstates Peak memory due to work-interval buffers
- sequenceCount throws TOO_SLOW instead of returning 0 for non-ordered events
- RENAME COLUMN after MODIFY QUERY on MergeTree raises LOGICAL_ERROR
- Distributed plan fails on subcolumn of dictionary-default column
- `Merge` children share one record: a sibling's dictionary aborts the query
- Disks: honor cancellation during local copies
- Docs
- C++ not yet supported