clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Buffer Table Engine not clearing/deleting its entries after flushing data to target table
- Replicated database supports some replicas as observer role to get metadata and apply log
- Embedded dashboard does not show error for HTTP 400.
- When a query returned no data, the embedded dashboard should print "No data" in place of the chart.
- incorrect peak memory accounting during grace_hash
- Skip indexes can be safely enabled if a predicate in the PREWHERE or in table ORDERBY
- PATINDEX & CHARINDEX functions
- support visiting S3 by assume role
- Cannot create parameterized view with union all clauses
- optimize final merges part in ‘cold’ volume instead of ‘hot’ volume
- Docs
- C++ not yet supported