clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Support specifying or auto-assigning Parquet field_ids for output columns
- Fix system.parts showing wrong default_compression_codec
- Ask for continuation in single-line mode when query is incomplete
- Fix coalesce type mismatch exception with FULL OUTER JOIN
- Fix duplicate ALIAS columns causing column count mismatch in Distributed
- Fix page cache autoResize history window size
- In case of trivial views, push whole outer query to shards.
- Add cuckoo_filter MergeTree skip index
- CHECK TABLE falsely reports corruption for JSON columns in wide parts due to missing hasDynamicSubcolumns handling in checkDataPart
- JSONExtractRaw returns empty string for typed JSON paths when value equals type default (0 for UInt32, '' for String)
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- C++ not yet supported