clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- [CI] Consolidate duplicated tests/ci helpers onto their ci/ (praktika) twins — one PR per helper
- Convert between a map and an array of key-value pairs in Field conversions
- Roll back collected set elements when collecting them fails
- Materialize a chain of MATERIALIZED CTEs in dependency order inside a distributed read's IN set
- Reject a non-representable `Enum` source in `accurateCast` and `accurateCastOrNull`
- `String` column vs `FixedString` constant: satisfiable AND folded to false
- DeltaLake: a column removed from the lake schema makes every `SELECT *` fail with `NOT_FOUND_COLUMN_IN_BLOCK` instead of the guarded schema-drift error
- Fail a BACKUP/RESTORE ON CLUSTER with the host's error from the DDL queue
- Reject a column SETTINGS name that is not a column-level setting
- Report DeltaLake schema drift with a descriptive error when column mapping is disabled
- Docs
- C++ not yet supported