clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Keep a `Bool` key input inexact for `IN`
- Fix `arrayProduct` wrapping on integer and `Decimal` overflow
- Fix lost rows and LOGICAL_ERROR for a distributed window query whose table column is used only in indexHint
- Do not use parallel replicas when a replica would read a temporary table
- Create tables without engine arguments through the Iceberg REST catalog
- Allow `ColumnNullable` without a null map
- Log a lost Iceberg metadata commit race at Debug, not Error
- Restore PREWHERE and avoid duplicate sets in mutations
- Fix rows dropped when a file-like table has a data column named `_idx` or `_path`
- Serialize the side of every join input in a distributed query plan
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- C++ not yet supported