clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- 'TOO_BIG_AST' exception while using function 'view' with multiple 'with' elements
- Light Weight Delete does not works well with limit
- Parquet fullscan reading is still slower than by duckdb
- kafka engine table proto file in clickhouse is damaged
- Potential deadlock (or major bottleneck) in `AsynchronousBoundedReadBuffer`
- I want Delta codec to support Nullable types, please be so kind to implement my feature request.
- Parallel replicas: works slower with skip index
- Reorder the PR jobs' tree to fail early and not launch heavy/long tests
- Catch the timeouts in CI ASAP and consider them the CI-system breakers.
- Idea: `clickhouse-agent` tool for collecting asynchronous metrics
- Docs
- C++ not yet supported