clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- text index do not support mapContainsValueLike
- Introduce column source ids and split query tree comparison into local and global
- Parallelize listing of globbed `s3` table function paths
- Add ALTER TABLE ... MODIFY ENGINE to change a MergeTree-family table's engine
- Improve `text` index pruning for multi-block postings
- feat: implement parameterized CTE support
- Enumerating time zones leads to accumulation of 2.9 GB of RAM.
- Proper parsing of decimal timestamps for DateTime64
- Add experimental Iguana compression codec (draft; default=Iguana for perf testing)
- Add trino checks into spark tests
- Docs
- C++ not yet supported