clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- [Bug] Untracked Memory in AggregateFunctionArgMin / AggregateFunctionArgMax with String Arguments Causes CGroup OOM Crash
- Fix flaky test_trace_log_memory_context: force a new global memory peak
- Fix `theilsU` window state returning noise when the frame's first argument is constant
- Give each Merge child table its own PREWHERE filter DAG
- Iceberg OPTIMIZE rejects position-delete overwrite snapshots when deleted row count != delete file count
- Fix segfault in `expandOrderByAll` for a `Merge` child query
- Propagating `getArgumentsThatCanBeOnlyNull` through the combinators silently changes the result type and value of every pre-existing `<agg>If<Combinator>(x, NULL)` expression
- Docs: use regular functions overview as landing page
- Fix GCD codec behavior on signed values
- Add a dedicated thread pool for lightweight snapshot creation
- Docs
- C++ not yet supported