clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- ASSUME CONSTRAINT not optimizing queries with MATERIALIZED COLUMNS
- S3Queue table is producing listing calls excessively
- Join parallelism is limited by number of streams in the left table
- RFC: Add support for user defined part/partition data skipping indices
- Tuples in Pretty and Vertical formats should be displayed naturally as subcolumns.
- Unexpected result when comparing `IN` expression and integer
- MergeTree: more efficient read operations for small data volumes
- Low uniqMerge performance issue in Materialized aggregatingMergetree
- Load job "system.part_log" failed JSON exception: error: 1 unexpected end of data
- encrypt/decrypt functions became 20x times slower after 24.4
- Docs
- C++ not yet supported