```json { "table_name": "nia_conversations", "primary_key": "id", "candidates": [ { "rank": 0, "partition_key": "id", "partition_key_label": "primary_identifier", "partition_key_reasoning": "RPUV = 1.00 (all unique), uniqueness = 1.000. This is the unique conversation identifier. While RPUV=1 typically indicates poor partitioning (one file per row), for dimension tables the primary_identifier serves as the partition key by convention.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables do not require internal sorting. No clustering key needed.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table storing conversation metadata. Each row represents a unique conversation (id is the primary key). The table has temporal columns (created_at, updated_at) but these are event-time attributes of the conversation entity, not a time axis for partitioning. Dimension tables are typically partitioned by their primary identifier." } ] } ```