Query time 0.00030
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "1.10"
},
"ordering_operation": {
"using_filesort": false,
"table": {
"table_name": "cscart_product_reviews",
"access_type": "ref",
"possible_keys": [
"idx_product_id",
"idx_user_id"
],
"key": "idx_product_id",
"used_key_parts": [
"product_id"
],
"key_length": "3",
"ref": [
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "33.33",
"backward_index_scan": true,
"cost_info": {
"read_cost": "1.00",
"eval_cost": "0.03",
"prefix_cost": "1.10",
"data_read_per_join": "560"
},
"used_columns": [
"product_review_id",
"product_id",
"user_id",
"reply_id",
"name",
"advantages",
"disadvantages",
"comment",
"rating_value",
"ip_address",
"is_buyer",
"product_review_timestamp",
"country_code",
"city",
"reply_user_id",
"reply",
"reply_timestamp",
"helpfulness",
"status",
"storefront_id",
"images_count",
"vote_up",
"vote_down"
],
"attached_condition": "(((`dev2`.`cscart_product_reviews`.`reply_id` = 0) and (`dev2`.`cscart_product_reviews`.`status` = 'A')) or ((`dev2`.`cscart_product_reviews`.`reply_id` = 0) and (`dev2`.`cscart_product_reviews`.`user_id` = 0) and (`dev2`.`cscart_product_reviews`.`status` = 'D')))"
}
}
}
}