```json { "table_name": "tables_catalog", "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 table entry in the catalog. For a dimension table, the primary identifier serves as the natural partition key.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables typically do not require internal sorting. The id column already provides unique access to each row.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table cataloging metadata about tables in the system. The id column is the unique identifier with perfect uniqueness (RPUV=1.00). While committed_at is identified as an event_time column, it represents when the table was committed to the catalog, not a temporal dimension for partitioning state snapshots. The table stores reference data about tables (their schemas, row counts, source paths, etc.) rather than tracking changes over time." } ] } ```