clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Incorrect data on `SELECT` from `metric_log` with `schema_type=transposed_with_wide_view` over `merge()`
- Logical error: 'Bad cast from type DB::ColumnNullable to DB::ColumnVector<char8_t>' with correlated subquery
- Server-side query parameters fail when the parameter name matches a setting (e.g. max_threads)
- `uniqCombined` returns `Nullable(UInt64)` on nullable input
- SYSTEM STOP MERGES not applying to newly created tables
- Comments on Materialized Columns (v25.8)
- `LazyOutputFormat` spends too much time
- Improve SQL Syntax Error Reporting to Show Accurate Error Position and Context
- Specify timeout setting name in timeout exceptions
- Logical error: 'Bad cast from type DB::ColumnVector<unsigned long> to DB::ColumnTuple'
- Docs
- C++ not yet supported