clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- async_insert_busy_timeout_ms is not respected
- How to add column for nested struct？
- age function returning wrong result
- Function pointInPolygon() check polygon is not valid, but boost::model::polyon check is valid
- ClickHouseHttpClient is not closing non-reusable connections
- Adaptive or separated bloom filter size for each column in index
- Store async insert pending .bin files in the external SSD storage instead of boot disk
- Lightweight deletes are extremely slow when index_granularity is small (e.g. 128)
- PK Join on a large table is extremly SLOW
- If a large amount of data appears in the system.replication_queue table and they does not disappear for a long time!
- Docs
- C++ not yet supported