clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- JIT-compiled intExp2 lacks overflow/bounds checks, returns wrong results for shift >= 64
- trimColumnIdentifier uses rfind('.') which over-strips Nested column prefixes in JOIN output
- Add per-query/per-user setting to limit open files
- Why don't timeout changes seem to apply to `SYSTEM WAIT VIEW`?
- RFC: Parallel Keeper Snapshot Reads via Chunked ZSTD Frames
- Regression: port parameter dropped from enableSecureConnection() call in ConnectionParameters constructor
- Iceberg UPDATE phase writes full data_block to each partition, causing row duplication when partition key changes to multiple values
- Missing decompress() in tryGetSubcolumnFromBlock dynamic structure path causes segfault
- FixedString PK columns lose primary key filtering for `s = ''` with optimize_empty_string_comparisons=1
- local server mode hard-codes temporary storage limit to 1gb
- Docs
- C++ not yet supported