clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Debug-build AST round-trip check rejects `ALTER USER ... RENAME TO {param:Identifier}`
- SYSTEM RELOAD/UNLOAD DICTIONARY ON CLUSTER ignores the initiator's current database and silently targets `default`
- Mutation on a Compact part fails with NOT_FOUND_COLUMN_IN_BLOCK when a materialized skip index covers a newly added column
- Buffer table silently discards an acknowledged INSERT when the destination schema drifts (DROP / re-CREATE) before the deferred flush
- Add test coverage for arrayElement compute-on-nested branches and simplify its type dispatch
- Make lost folders during Ordinary => Atomic just empty
- Fix primary key over-pruning for a type-erased string constant
- query_plan_join_swap_table changes the result of ANY INNER JOIN with OR-ed ON conditions (deterministic, max_threads = 1)
- Check `s3` URLs before schema inference
- Store `S3` redirect URLs only after successful requests
- Docs
- C++ not yet supported