clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fast single-user look-up in system.users
- Add RowsAfterWhereFilter profile event
- Vector skip index not used when vector score alias is referenced in WHERE clause (falls back to MergeTree scan)
- Optimization of `GROUP BY` in the presence of `ORDER BY` and `LIMIT`
- Improvements for the hash join code
- Add `ipcrypt` functions for format-preserving IP address encryption
- Add settings for SQL compatible behaviour of `SEMI` and `ANTI` joins
- Fix hang in `--queries-file` / `-q` when stdin is a pipe with no data
- Extend cast_keep_nullable to work with Dynamic/JSON types
- Change SSM parameter
- Docs
- C++ not yet supported