id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | SIMPLE | category | index_merge | PRIMARY, fk.category.parent_id | fk.category.parent_id, PRIMARY | 17, 16 | 4 | 100.00 | Using sort_union(fk.category.parent_id, PRIMARY); Using where |
id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | SIMPLE | category | index_merge | PRIMARY, fk.category.parent_id | fk.category.parent_id, PRIMARY | 17, 16 | 4 | 100.00 | Using sort_union(fk.category.parent_id, PRIMARY); Using where |