I need to count distinct values for all categorical columns across all tables. I already have evidence showing approximate distinct counts for the top 50 columns (step-6), but I need to get a complete picture across all categorical columns in the dataset. Let me query for distinct counts across all VARCHAR columns (which represent categorical data in this dataset): ```json { "action": "tool_call", "reasoning": "I have partial results showing the top 50 columns by distinct count, but need a complete view of all categorical (VARCHAR) columns. I'll query the analytics.column_overview metadata to get distinct_count for all VARCHAR columns across all tables, ordered by table and column name for systematic coverage.", "tool": "query_sql", "args": { "sql": "SELECT table_name, column_name, phys_type, distinct_count, approx_distinct_count FROM analytics.column_overview WHERE phys_type = 'VARCHAR' ORDER BY table_name, column_name", "purpose": "Get complete distinct value counts for all categorical (VARCHAR) columns across all tables" } } ```