clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- ClickHouse recommends `ALTER TABLE ... MODIFY COLUMN ... REMOVE EPHEMERAL` but this is invalid
- MaterializedPostgreSQL pg_publication_tables have equal name in column pubname for two db in one cluster.
- SQL with pipes
- Click house problem with time as double format
- Possible to set array column default to emptyArrayString() for column in nested table
- Using arrayFilter in arrayMap, passing in external variables, the entry takes up too much memory
- Custom "Content-Type" header not working for s3 engine
- Support for multi-parted DeltaLake checkpoint files
- A metric to expose the time spend on index analysys
- Renaming a projection
- Docs
- C++ not yet supported