clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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Help out
- Issues
- hasAll/hasAny on Array(LowCardinality(T)) materialize the dictionary every block, making them slower than on Array(T); resolving the needle to a dictionary index cuts a 2M-row filter 42%
- Update exclude-authors.txt
- Backport #116998 to 26.3: Bound PostgreSQL protocol messages by their declared size
- Introduce Histogram Column Statistics
- Backport #120214 to 26.7: Keep the LIMIT block size shrink for queries with arrayJoin
- Backport #120214 to 26.8: Keep the LIMIT block size shrink for queries with arrayJoin
- Backport #120214 to 26.9: Keep the LIMIT block size shrink for queries with arrayJoin
- LowCardinality(UInt64) primary key fails UNKNOWN_TYPE with HASHED/CACHE/DIRECT
- Port the remaining DNS resolution paths to the DNS cache
- Distributed SELECT silently drops shard when its connection pool is full
- Docs
- C++ not yet supported