clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Allow POST instead of GET for url() select
- Performance inprovement - parse only requested columns in TSV/CSV and similar text formats without header
- Native BACKUP silently skips over exporting data for Engine=Join
- `clickhouse format --comment` drops internal comments
- Use of uncompressed cache consumes a lot more memory than expected
- Add to query_log column with tables join columns
- Too long query with Table Functions jdbc
- UPDATE with subquery in SET clause produces wrong result when updated column is indexed
- Cannot read Parquet FIXED_LEN_BYTE_ARRAY with DELTA_BYTE_ARRAY encoding
- Dictionary Cache layout are not working as expected
- Docs
- C++ not yet supported