clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Successful insert generates 3 unexpected (and weird) system errors
- (suspected) Manually damaging the filesystem cache could lead to infinite retries.
- Bad error message when mutating non-existent column
- ParallelFormattingOutputFormat: limit memory consumption
- `ngrambf_v1` index produces false negatives for `LIKE` patterns with backslash-escaped non-special characters
- cramersVMatrix, theilsUMatrix analogues to cramersV functions (crosstab)
- ClickHouse backup disk quota exceeded cause clickhouse can not start
- toDateTime() : missing leading zero in the hour component leads to error
- DICTIONARY Dictionary Polygon not working with Polygon data type
- Trailing commas in SELECT clauses aren't supported with aliases
- Docs
- C++ not yet supported