Explain Query (mysql)
EXPLAIN SELECT LCASE(itemname) as itemname, ai.type, ai.name
FROM authassignment t1
LEFT JOIN authitem ai ON ai.name = t1.itemname
where userid = 618755
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | t1 | index | PRIMARY | 323 | 14155 | 10.00 | Using where; Using index | |||
| 1 | SIMPLE | ai | eq_ref | PRIMARY | PRIMARY | 257 | securelufacom.t1.itemname | 1 | 100.00 |