clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `calculateFieldIndices` missing `.value` suffix for MAP type causes `THERE_IS_NO_COLUMN` exception in V1 Parquet reader
- libhdfs3 federation problem
- Fix overflow in initializeFromVectorAndValue. --issue=#102210
- `replaceTypeNamesToPhysicalRecursively` skips Tuple elements inside `Array`/`Map`, returning empty arrays for column-mapped DeltaLake tables
- `evaluation_time` rename entry in SettingsChangesHistory uses `0` as previous_value, corrupting `promql_evaluation_time` under `compatibility = '25.8'`
- Expose Per-Index Metrics for Vector Similarity Index Cache Usage
- Fix prewhere on hive partitioned files without partition column in the data file
- `executeImplArray` only checks `NameStartsWith` — case-insensitive startsWith on arrays silently performs endsWith
- `parseRole`, `parseQuota`, `parseSettingsProfile` missing dot un-escaping that `parseUser` got in this PR
- Check flaky 03037_dynamic_merges
- Docs
- C++ not yet supported