clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add setting to use packed storage for parts in busy partitions
- Fix vector search with `arrayJoin` below the sort and with a row policy
- Add table schema to SQLInsert output
- Iceberg with iceberg_use_version_hint=1: a crash between the vN.metadata.json PUT and the version-hint.text advance permanently wedges all future INSERTs (DATALAKE_DATABASE_ERROR)
- Disable the map element to subcolumn rewrite by default and revert the PREWHERE grouping change
- Respect filesystem_prefetches_limit when prefetching JSON substreams
- Add incremental rmv core
- Fix the per-query filesystem cache write limit
- Add a full-featured AI agent to the client (the `?` command)
- Honour lock_acquire_timeout for the lightweight update lock in Keeper
- Docs
- C++ not yet supported