clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix vector OOB in ConvertQueryToCNFPass when WHERE is a correlated subquery (STID 3452-4527)
- Add histograms nested column to system.metric_log
- Bound retries in FuzzQuerySource to prevent hung queries
- Cannot recover from read_only mode
- `normalizeQueryToPODArray` silently drops unary `+`/`-` before non-literal tokens after a comma
- `convertFieldToTypeImpl` skips promotion only for `Float32`, leaving `BFloat16` string-equality returning zero rows
- ODBC bridge response truncated mid-row when `parallelize_output_from_storages=1` and `max_threads>=2` over a view (CANNOT_READ_ALL_DATA)
- `OptimizeGroupByInjectiveFunctionsPass` trusts `toFixedString::isInjective=true` and produces wrong GROUP BY counts when input strings of different lengths zero-pad to the same FixedString
- `KEYED BY normalized_query_hash` quotas track READ_ROWS/READ_BYTES/RESULT_ROWS/RESULT_BYTES/EXECUTION_TIME/WRITTEN_BYTES on shared session intervals, defeating per-hash isolation
- Logical error: Invalid number of columns in chunk pushed to OutputPort. Expected A, found B (STID: 2270-32ca)
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- C++ not yet supported