clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add is_wildcard bool to system.grants (#92835)
- Is it possible to re-calculate a materialized column when an AggregatingMergeTree table merges parts?
- Add a setting that makes ClickHouse compatible with the SQL standard
- Implement fused TopNAggregation operator for GROUP BY ... ORDER BY aggregate LIMIT K
- ALTER TABLE ... UPDATE mutation rewrite more partitions than needed (PARTITION BY toYYYYMMDD(toDate(ym_pv_dateTime)))
- Implement/parameterized view explicit schema v2
- Slow CREATE/DELETE and SYSTEM SYNC REPLICA suddenly appeared
- [WIP] Byte stream split Codec
- Auto-size background thread pool defaults based on CPU cores
- Upgrade POCO to use PCRE2
- Docs
- C++ not yet supported