clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- clickhouse-client: Use ssh agent for ssh key authentication
- Performance becomes worse for queries with LIMIT clause after #64607
- JSONExtract does not support leading zeros
- 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)
- [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
- Add ability to include sql file from a sql file
- Support Hive MetaStore and reading Apache Hudi
- max_result_rows affect result of subqueries on shards for distributed queries (INSERT SELECT)
- Chimp compression for floating point data
- Docs
- C++ not yet supported