{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "24.01"
},
"table": {
"table_name": "cscart_categories",
"access_type": "range",
"possible_keys": [
"parent"
],
"key": "parent",
"used_key_parts": [
"parent_id"
],
"key_length": "3",
"rows_examined_per_scan": 10,
"rows_produced_per_join": 10,
"filtered": "100.00",
"index_condition": "(`eshopuga_upgr_4122`.`cscart_categories`.`parent_id` in (349,350,351,352,353,354,355,356,357,358))",
"cost_info": {
"read_cost": "22.01",
"eval_cost": "2.00",
"prefix_cost": "24.01",
"data_read_per_join": "26K"
},
"used_columns": [
"category_id",
"parent_id"
]
}
}
}