clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `UNION DISTINCT` skips the preliminary parallel `DISTINCT` that the equivalent rewrite gets
- Server shutdown hangs forever when a backup is blocked on unresponsive I/O
- Sync private
- [CI crash] Failed to build query plan for join operation
- [CI crash] ExpressionActions execution failed in PipelineExecutor
- Add min_ttl_age_to_delete_merge_seconds to pace TTL delete merges
- `ATTACH VIEW <name>` is a syntax error although `DETACH VIEW <name>` is accepted
- Add equality-prefiltered NEAREST join support
- Fix primary indexes of newly written parts staying in memory forever when PK cache is enabled
- Add support for parquet ALP encoding
- Docs
- C++ not yet supported