clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Read amplification for sparse row access from text index on object storage
- Fix trailing comma in SELECT when the last column has an alias
- Allow display password hashes for existing users
- Add LossyQuantile codec for lossy compression of floating-point numbers
- Support CREATE OR REPLACE TEMPORARY VIEW
- Add test: Multi-file archive-glob `One` path in `StorageFileSource::generate` (EmptyReadBuffer at StorageFile.cpp:1568) untested
- Analyzer LOGICAL_ERROR 'Column identifier id is already registered' on ALTER/lightweight UPDATE with IN-subquery joining derived tables (regression in 26.6)
- Mark caught LOGICAL_ERROR exception as logged in BackupDataFileNameGenerator gtest
- Add test coverage and docs for force_add_bucket DataLake catalog setting
- Add per-part type narrowing for Dynamic columns (statistics-based, opt-in v4)
- Docs
- C++ not yet supported