clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add PFor as a compression codec
- If there are too many like search conditions, the query will become very slow.
- Implement more econometrics methods
- Fix object storage `truncate`
- PREWHERE support for DeltaLake and Iceberg tables
- Reapply "add assertion that checksums.txt is consistent"
- Lazy materialization: Method deserializeBinaryBulk of SerializationAggregateFunction does not support cases where rows_offset {} is non-zero
- Incorrect data in lazy materialization
- Lock contention when getting list of active parts in SELECT query
- Parquet implementation status
- Docs
- C++ not yet supported