Query time 0.00135
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "185.81"
},
"grouping_operation": {
"using_filesort": false,
"nested_loop": [
{
"table": {
"table_name": "cscart_discussion",
"access_type": "range",
"possible_keys": [
"object_id"
],
"key": "object_id",
"used_key_parts": [
"object_id",
"object_type"
],
"key_length": "7",
"rows_examined_per_scan": 41,
"rows_produced_per_join": 41,
"filtered": "100.00",
"index_condition": "((`ea201_diorama`.`cscart_discussion`.`object_id` in (34835,37789,39361,34820,40466,40398,40351,38316,39325,40308,39613,38314,37788,36045,39878,39611,39354,39353,39299,39300,39268,38317,39137,39138,39139,39058,38994,39313,37790,38179)) and (`ea201_diorama`.`cscart_discussion`.`object_type` = 'P'))",
"cost_info": {
"read_cost": "79.21",
"eval_cost": "8.20",
"prefix_cost": "87.41",
"data_read_per_join": "984"
},
"used_columns": [
"thread_id",
"object_id",
"object_type",
"type"
]
}
},
{
"table": {
"table_name": "cscart_discussion_posts",
"access_type": "ref",
"possible_keys": [
"thread_id",
"thread_id_2"
],
"key": "thread_id",
"used_key_parts": [
"thread_id"
],
"key_length": "4",
"ref": [
"ea201_diorama.cscart_discussion.thread_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 41,
"filtered": "100.00",
"cost_info": {
"read_cost": "41.00",
"eval_cost": "8.20",
"prefix_cost": "136.61",
"data_read_per_join": "17K"
},
"used_columns": [
"post_id",
"thread_id",
"status"
],
"attached_condition": "<if>(is_not_null_compl(cscart_discussion_posts), ((`ea201_diorama`.`cscart_discussion_posts`.`thread_id` = `ea201_diorama`.`cscart_discussion`.`thread_id`) and (`ea201_diorama`.`cscart_discussion_posts`.`status` = 'A')), true)"
}
},
{
"table": {
"table_name": "cscart_discussion_rating",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"thread_id"
],
"key": "PRIMARY",
"used_key_parts": [
"post_id"
],
"key_length": "3",
"ref": [
"ea201_diorama.cscart_discussion_posts.post_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 41,
"filtered": "100.00",
"cost_info": {
"read_cost": "41.00",
"eval_cost": "8.20",
"prefix_cost": "185.81",
"data_read_per_join": "656"
},
"used_columns": [
"rating_value",
"post_id",
"thread_id"
],
"attached_condition": "<if>(is_not_null_compl(cscart_discussion_rating), ((`ea201_diorama`.`cscart_discussion_rating`.`thread_id` = `ea201_diorama`.`cscart_discussion`.`thread_id`) and (`ea201_diorama`.`cscart_discussion_rating`.`rating_value` <> 0)), true)"
}
}
]
}
}
}
Result
product_id |
average_rating |
discussion_type |
discussion_thread_id |
34820 |
|
D |
3870 |
34835 |
|
D |
3944 |
36045 |
|
D |
8795 |
37788 |
|
D |
14129 |
37789 |
|
D |
14130 |
37790 |
|
D |
14131 |
38179 |
|
D |
15035 |
38314 |
|
D |
17430 |
38316 |
|
D |
17434 |
38317 |
|
D |
17439 |
38994 |
|
D |
23748 |
39058 |
|
D |
25801 |
39137 |
|
D |
26808 |
39138 |
|
D |
26809 |
39139 |
|
D |
26810 |
39268 |
|
D |
26864 |
39299 |
|
D |
26919 |
39300 |
|
D |
26920 |
39313 |
|
D |
26971 |
39325 |
|
D |
27224 |
39353 |
|
D |
27574 |
39354 |
|
D |
27575 |
39361 |
|
D |
27585 |
39611 |
|
D |
30236 |
39613 |
|
D |
30238 |
39878 |
|
D |
30774 |
40308 |
|
D |
37304 |
40351 |
|
D |
37051 |
40398 |
|
D |
37191 |
40466 |
|
D |
36838 |