clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix `grouping` for `GROUPING SETS` keys that fold to the same value
- Require dictionary privileges to RENAME or EXCHANGE a dictionary
- Fix text-search functions outside the filter ignoring the text index tokenizer and pre/postprocessor under a WHERE clause
- `GROUPING` masks are wrong for distinct constant expressions in `GROUPING SETS`
- Fix the missing `WITH TOTALS` row of a JOIN whose `ON` is constant false
- Skip 8192-row blocks without a match in the query condition cache for Parquet files
- Return the cached row count of a file as one chunk when only `count()` reads it
- WIP : Experimental IVF method for `vector_similarity` indexes
- Refuse a MODIFY COLUMN default that would leave old parts unsorted by the sorting key
- Keep NULL rows in index analysis of a decreasing function of a `Nullable` key
- Docs
- C++ not yet supported