clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add test: `clamp` per-row `best_arg` selection in a multi-row block with mixed clamping outcomes is untested
- Add test: `StorageFileLog` silent-return branch for path outside `user_files_path` (ATTACH/SECONDARY_CREATE/FORCE_ATTACH/FORCE_RESTORE) untested
- Add test: `MOVE PARTITION ... TO TABLE` back-pressure throw via `parts_to_throw_insert` on destination is untested
- `BackupWriterAzureBlobStorage::copyFile` writes destination outside `blob_path`, leaking blobs to container root
- `logQueryStart` early return when `query_log` is null silently disables `system.query_metric_log` collection
- Add test: `MergeTreeData::movePartitionToTable` `NOT_IMPLEMENTED` throw for non-`MergeTree`-family destination is untested
- Add test: Multi-row `LineString` round-trip via `wkt`/`readWKTLineString` untested — both `ColumnToLineStringsConverter::convert` slicing and `LineStringSerializer::add` cumulative offsets exercised only with single rows
- Cherry pick #103457 to 25.8: Fix potential out-of-bounds read in the `ALP` codec decompression
- Cherry pick #103457 to 26.2: Fix potential out-of-bounds read in the `ALP` codec decompression
- Add test: `mergeConditionNodes(HAVING, QUALIFY)` correctness untested — existing test uses identical conditions
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