clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Schema evolution unsupported by DataLakeCatalog in v25.3.2.39
- [Umbrella] Extended support for the geospatial data
- TO_BASE64 does not match MySQL's TO_BASE64() output.
- For `keyed_by_ip` quotas, add a `ipv4_prefix_bits` and `ipv6_prefix_bits` options.
- Add `optimize_or_has_any_chain` for hasAny(arr, arr0) OR ... OR hasAny(arr, arrN)
- Hygon (an x86_64 compatible CPU) supposedly has a difference in behavior while parsing JSON
- Query rewrite rules (RFC)
- EmbeddedRocksDB: Possible bad error message management
- New form of default value keyword,`PROMOTED`, for handling materialization of map values into dedicated columns
- A large number of close_wait caused service downtime
- Docs
- C++ not yet supported