clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- CORS header disallows progress updates in HTTP interface
- Remove `ConstStoragePtr` from the `MergeTreeData::SnapshotData`
- MaterializedPostgreSQL drops existing publication when multiple ClickHouse databases use the same Postgres DB
- Nested EXISTS with deep correlated reference to outer JOIN table fails with NOT_FOUND_COLUMN_IN_BLOCK
- CPU Slot Over-provisioning in Workload Scheduling
- `GLOBAL RIGHT OUTER JOIN` on Distributed tables duplicates unmatched rows across shards without diagnostics
- `SELECT *` with ANTI/SEMI JOIN incorrectly includes columns from the right table
- Create table ... clone as does not respect db in fully qualified from table name
- floor(x, N) returns inaccurate results for specific floating-point numbers (e.g., floor(0.01860, 5) -> 0.01859)
- Uncompressed arrow buffers are marked incorrectly
- Docs
- C++ not yet supported