clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Avoid GET requests for unchanged plain-rewritable directories
- Bound Compact reads by the requested columns
- Fix(MergeTree): mergeTreePartInfo for numeric detached partitions
- Confine the local filesystem locations a custom disk defined in SQL can name
- Make system.one and bounded numbers reads serializable for distributed plan fragments
- INNER JOIN equality evaluates `t2.c0 LIKE t2.c0` on the other table and throws on a non-joining `\` row
- Do not constant-fold a lambda that captures an IN set which is not built yet
- Reduce per-block synchronization overhead in the pipeline executor
- Perf(Execution): Skip filtering for uniform filter masks
- Do not populate the query condition cache under a join runtime filter
- Docs
- C++ not yet supported