| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | PRIMARY | t0 | ref | PRIMARY, IDX_B05778914584665A, IDX_B057789112469DE2 | PRIMARY | 4 | const | 7 | Using where |
| 1 | PRIMARY | dtb_category | eq_ref | PRIMARY, IDX_5ED2C2BD380F18A | PRIMARY | 4 | xb235735_stageb.t0.category_id | 1 | Using where |
| 3 | DEPENDENT SUBQUERY | plg_schedule_time | unique_subquery | PRIMARY, IDX_1B30AA8F27BFAF1B | PRIMARY | 4 | func | 1 | Using where |
| 4 | DEPENDENT SUBQUERY | plg_schedule_time | unique_subquery | PRIMARY | PRIMARY | 4 | func | 1 | Using where; Full scan on NULL key |