```json { "table_name": "datasets", "primary_key": "dataset_id", "candidates": [ { "rank": 0, "partition_key": "dataset_id", "partition_key_label": "primary_identifier", "partition_key_reasoning": "dataset_id is the unique identifier with RPUV=1.00, uniqueness=1.000, and 109 unique values across 109 rows. Each dataset_id appears exactly once, making it the natural primary key for this dimension table.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables typically do not require clustering keys as they are reference tables without internal ordering requirements.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table cataloging datasets. dataset_id is the clear primary identifier. The table contains metadata about datasets including source, status, and timestamps. While created_at and updated_at exist as event_time columns, they describe when the dataset record was created/modified, not a timeline to partition by. The table is small (109 rows) and serves as a lookup/reference table." } ] } ```