Using the explain plan in JSON format gives complete information about the query execution:
mysql> EXPLAIN FORMAT=JSON SELECT dept_name FROM dept_emp JOIN employees ON dept_emp.emp_no=employees.emp_no JOIN departments ON departments.dept_no=dept_emp.dept_no WHERE employees.first_name='Aamer'\G*************************** 1. row ***************************EXPLAIN: { "query_block": { "select_id": 1, "cost_info": { "query_cost": "286.13" }, "nested_loop": [ { "table": { "table_name": "employees", "access_type": "ref", "possible_keys": [ "PRIMARY", "name" ], "key": "name", "used_key_parts": [ "first_name" ], "key_length": "58", "ref": [ "const" ], "rows_examined_per_scan": 228, "rows_produced_per_join": 228, "filtered": "100.00", ...
