clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Simple modifications to expressions leads to system.numbers queries taking very long
- min_os_cpu_wait_time_ratio_to_throw vs SHOW PROCESSLIST
- Skip indexes on array expressions are created but never used
- varPopStable returns inf on empty input instead of NULL
- Make bloom filter indexes mergeable if they have the same granularity
- Iceberg partition pruning using icebergS3Cluster
- `optimize_on_insert` and materialized views
- Stress test should ignore the `no-...` tags of tests.
- Code: 499. DB::Exception: Received from localhost:9000. DB::Exception: Failed to get object info: No response body.. HTTP response code: 403: while reading logs.csv: While executing S3(_table_function.s3)Source. (S3_ERROR)
- Some extra configuration from the command-line arguments are not applied for the server
- Docs
- C++ not yet supported