order by number of children in the parquet file

python/2_ancestors.py

@@ -112,6 +112,7 @@ final_output_query = """
             ac.all_children
         FROM ancestor_children ac
         LEFT JOIN direct_children_mapping dcm ON ac.ancestor = dcm.parent
+        ORDER BY array_length(ac.all_children) DESC
     ) TO 'tables/ancestor_children.parquet' (FORMAT 'parquet')
 """
 con.execute(final_output_query)