clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add optional text representation to FixedString
- Cherry pick #105303 to 25.8: Fix long queries for unity
- Flaky test 03912_encrypted_s3_cache_cancel_read: use-after-free / data corruption on query cancellation in encrypted+cached S3 reader chain
- ALTER TABLE do not check WHERE columns rights
- Support projection for `Arrow` IPC input
- [CI flaky crash] SIGSEGV in MergeTreeReaderCompact::readData (SerializationNumber<UInt64>) on "db disk, distributed plan, sequential" shard
- deduplication_path for attach/replace should include src table name
- EXPLAIN SYNTAX with old analyzer ignores SQL SECURITY DEFINER for parameterized views
- max_temporary_data_on_disk_size_for_query/_for_user not enforced on external sort spill in 26.2.4
- `TTLDrop` merge opens all source parts and allocates buffers instead of just dropping them
- Docs
- C++ not yet supported