clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix views and mutations treating an alias declared inside a `WITH` expression as a table name
- Fix mutations reading a subcolumn of a column rewritten by an earlier command
- Keep `NULL` in text search functions on a `Nullable` column whose text index has a postprocessor
- Read a FileLog file from the beginning when it reuses the inode of a deleted file
- Filter columns in-place in FilterTransform
- Answer `sum`, `avg` and `sumCount` from per-part statistics
- UNIQUE KEY: mutations
- C++ reimplementation of jemalloc in base/allocator
- estimateCompressionRatioIf ignores its condition on the single-place path
- Fix constraint optimization dropping rows at a constraint bound
- Docs
- C++ not yet supported