clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Space-filling curve index analysis drops rows for `Dynamic` arguments with values >= 2^32
- Add a local MaxMindDB table engine with IPv4/IPv6 lookups (1/3)
- Count columns read only by PREWHERE in the MergeTree block size estimate
- Skip empty configuration files in `config.d` instead of failing to load the configuration
- Do not answer min/max from statistics of a column a part stores with another type
- Do not let Iceberg min/max pruning drop rows that hold a NaN
- Table function cache key ignores aliases: alias-only `view` pairs collide
- Support prewhere in delta lake
- `cluster_function_wait_for_replica_ms` >= ~9.2e12 overflows `now() + wait` (UB)
- GRANT TABLE ENGINE rejects database engines required by CREATE DATABASE
- Docs
- C++ not yet supported