```json { "table_name": "sample_queries", "primary_key": "id", "candidates": [ { "rank": 0, "partition_key": "id", "partition_key_label": "primary_identifier", "partition_key_reasoning": "RPUV = 1.00 (perfectly unique), uniqueness = 1.000, monotonicity = 1.000. This is the primary identifier for each query record. While RPUV=1 typically indicates one file per row, for dimension tables the primary_identifier serves as the natural partition key.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables do not require internal sorting. Each row represents a distinct query entity.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table cataloging sample queries. The id column is the unique identifier with perfect uniqueness (RPUV=1.00, uniqueness=1.000). While created_at is marked as event_time in the classification, it represents when the query was created in the catalog, not a timeline to trace. The table stores reference data about queries (their text, description, engine, dataset association) rather than tracking state changes or events over time. Metadata columns (_ingestion_timestamp, _batch_id, _source_file, _source_system) are all constant across the dataset and serve audit purposes only." } ] } ```