Explain Query (mysql)
EXPLAIN SELECT child
FROM authitemchild
WHERE parent = 'default_guest'
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | authitemchild | ref | PRIMARY, child | PRIMARY | 66 | const | 60 | 100.00 | Using index |