```json { "table_name": "batches", "primary_key": "batch_id", "candidates": [ { "rank": 0, "partition_key": "batch_id", "partition_key_label": "primary_identifier", "partition_key_reasoning": "batch_id is the unique identifier for each batch record with RPUV=1.00 and uniqueness=1.000, making it the natural primary key for this dimension table. Each batch_id appears exactly once.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables typically do not require clustering keys as they are reference tables organized by their primary identifier.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table tracking batch processing metadata. The batch_id serves as the primary identifier with perfect uniqueness. The table contains both regular batches and their corresponding '_gold' variants (processing stages). Time columns (started_at, completed_at) are event timestamps recording when batches started and finished, not temporal partitioning axes. The status field tracks batch lifecycle (ready, running, completed)." } ] } ```