clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- random load balancing appears to be favoring one replica over the other
- Parallelize column_modification_time computation in system.parts_columns
- Support `GROUPS` frame mode for window functions
- Fix allocator abort in validateColumnOfFixedSize for huge index_granularity
- Avoid vertical TTL delete for TTLDrop merges
- Add basic support for ISODate("2024-05-29T23:16:12.256Z") JSON parsing
- Iceberg S3 path isn't cleaned up after DROP TABLE
- tryOptimizeAndCompareChain produces non optimal filter conditions
- Document supported JSONPath syntax for JSON_VALUE / JSON_QUERY / JSON_EXISTS
- Don't block server shutdown on idle keep-alive connections
- Docs
- C++ not yet supported