clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Engine redis write has \x01 code in the key?
- Support remote query timeout for distributed query.
- ISO timestamp string with missing seconds is parsed wrong
- Logical error "Block structure mismatch" after metadata-only ALTER
- `levensteinDistance` is slow
- Check types of materialized column on creation
- 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
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- C++ not yet supported