clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Why does JSONExtractString on a numeric key fail on comparison with a numeric literal?
- Arrow Variant/Json support
- min/max/uniq aggregate functions can be calculated from secondary indices of type `minmax` and `set`
- Flaky test: test_userspace_page_cache/test.py::test_size_adjustment
- Logical error: 'Part minmax index by time is neither DateTime or DateTime64'
- Logical error: Block structure mismatch in A stream: different columns: (STID: 0993-29ef)
- RFC: Reimplement INSERTs into aliases columns without rewrite on AST level
- WIP create_time in system.kafka_consumers
- parquet reader v3 sometimes failed to read DeltaBinaryPacked encoded timestamp('us', 'UTC') column
- Bad hints about table names
- Docs
- C++ not yet supported