clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Hygon (an x86_64 compatible CPU) supposedly has a difference in behavior while parsing JSON
- Query rewrite rules (RFC)
- New form of default value keyword,`PROMOTED`, for handling materialization of map values into dedicated columns
- A large number of close_wait caused service downtime
- ReportRace in MergeTreeData::getMinMaxCountProjectionBlock
- Functions for rolling hashes
- insert_deduplication_token does not work and lead to data duplication
- How to insert parquet files into null table engine #81557
- StorageKafka2 - no test with isolation.level = read_committed
- Proper rounding for Float->DateTime64
- Docs
- C++ not yet supported