| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | PRIMARY | contacts | index_merge | idtypestructure, country, publish | idtypestructure, publish, country | 18, 1, 7 | 20 | Using intersect(idtypestructure, publish, country); Using where; Using filesort | |
| 2 | MATERIALIZED | contact_classification | ref | PRIMARY, idclassification | idclassification | 4 | const | 4 | Using index |