clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Query condition cache doesn't work properly with `parallel_replicas_mode='sampling_key'`
- icebergS3 function (and table engine) high memory usage
- Enable `--replace-log-memory-with-mergetree` in parallel replicas job
- Support for Trimmed Mean Metrics
- Bug or docs issue: invalid behavior of `match` function
- Losing Data After upgrade when using Ceph volumes and no replication
- Dictionaries with executable source created via DDL fail
- DateTime64 with timezone is incorrectly constant-folded in PREWHERE by analyzer
- Logical error: Virtual column A must be filled by range reader (STID: 3833-4750)
- High memory use when listing DataLake/Glue tables (getAllTableNames/SHOW TABLES/system.tables)
- Docs
- C++ not yet supported