clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Support of non-map columns for -Map combinator (also support for multi argument aggregate functions)
- Subquery in TTL expression breaks ClickHouse in interesting ways
- OPTIMIZE on table with many small parts: No need to merge parts according to merge selector algorithm
- Merge -> Distributed -> Merge tables encouter exception MULTIPLE_EXPRESSIONS_FOR_ALIAS when reading data
- Advanced dashboard: if I maximize the chart and then drag it, it collapses to a smaller size.
- incomplete parts are created because of input function due to parsing error
- Schema inference hints for Parquet
- Add checks for conversion from Numbers to Enums
- file() table function with deletes
- clickhouse-server process still holds open files when renaming a part causing EACCESS in wsl filesystem
- Docs
- C++ not yet supported