clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Query cache can store a sorted subquery result unsorted, losing ORDER BY
- Support `COLLATE` in the `GROUP BY` top-K optimization
- Make query_plan_push_down_expressions_below_window never worse than the current analyzer
- `LibArchiveReader` stops at `ARCHIVE_WARN`: entries after a non-ASCII name lost
- s3Cluster fails on brace-listed zip/7z archives: archive size treated as 0
- Joda parsing: add 12 hours for PM once when the format has a zone name
- Percent-encode spaces in URLs of `url` and `s3` table functions
- Fix(Geo): Make polygon areas independent of ring orientation
- Fix geometry functions returning empty results for rows after an empty `MultiPolygon` or `MultiLineString`
- `force_data_skipping_indices` still fails projection candidate analysis
- Docs
- C++ not yet supported