clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- 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
- Fix wrong results of a Merge read over a Distributed child that lacks a column
- Do not count other outer rows against `max_rows_to_group_by` in a correlated subquery
- Read only the string lengths for length, empty and notEmpty over Parquet files
- Fix `RENAME COLUMN` rebinding renamed references to an alias or a lambda parameter
- Do not apply a killed mutation to a MergeTree part whose task had not started yet
- Fix stale query condition cache results after a metadata-only ALTER of a column
- Iceberg `OPTIMIZE TABLE` commits a new snapshot instead of rewriting the table
- Docs
- C++ not yet supported