explain_ignore_index.sql

mysql> EXPLAIN SELECT SQL_NO_CACHE * FROM articles IGNORE INDEX(PRIMARY) WHERE article_id = 150000;
+----+-------------+----------+------------+------+---------------+------+---------+------+--------+----------+-------------+
| id | select_type | table    | partitions | type | possible_keys | key  | key_len | ref  | rows   | filtered | Extra       |
+----+-------------+----------+------------+------+---------------+------+---------+------+--------+----------+-------------+
|  1 | SIMPLE      | articles | NULL       | ALL  | NULL          | NULL | NULL    | NULL | 996520 |    10.00 | Using where |
+----+-------------+----------+------------+------+---------------+------+---------+------+--------+----------+-------------+
1 row in set, 2 warnings (0.00 sec)