clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add system.query_metric_log
- create a setting to not send an empty row block to the URL table when MV filters out all rows
- clickhouse server is normal,but distributed table left too many bin files not cleaned
- Then recloning the lost replica - try to map the local parts with cloned replica by block numbers and checksums (not only by the full name)
- Truncate column name in pretty format
- S3 parallel request to listing files
- [ClickHouse-57381]Implement MemoryCredits profile event to track memory usage over time.
- `materialized_views_ignore_errors` has a pretty confusing implementation and doesn't even address the issues it claims to address
- Compile clang/llvm from sources
- Write the requested metadata version when freezing a part
- Docs
- C++ not yet supported