Query time 0.00120
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "144.01"
},
"grouping_operation": {
"using_filesort": false,
"nested_loop": [
{
"table": {
"table_name": "q_products_categories",
"access_type": "range",
"possible_keys": [
"PRIMARY",
"pt"
],
"key": "pt",
"used_key_parts": [
"product_id"
],
"key_length": "3",
"rows_examined_per_scan": 30,
"rows_produced_per_join": 30,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (2867,2868,2869,2870,2871,2872,2873,2874,2875,2876,2877,2878,2879,2880,2717,2718,2719,2720,2721,2722,2723,2725,2726,2727,2728,2729,2730,2731,2732,2733))",
"cost_info": {
"read_cost": "66.01",
"eval_cost": "6.00",
"prefix_cost": "72.01",
"data_read_per_join": "480"
},
"used_columns": [
"product_id",
"category_id",
"link_type"
]
}
},
{
"table": {
"table_name": "product_position_source",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"pt"
],
"key": "PRIMARY",
"used_key_parts": [
"category_id",
"product_id"
],
"key_length": "6",
"ref": [
"const",
"portal.q_products_categories.product_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 30,
"filtered": "100.00",
"cost_info": {
"read_cost": "30.00",
"eval_cost": "6.00",
"prefix_cost": "108.01",
"data_read_per_join": "480"
},
"used_columns": [
"product_id",
"category_id",
"position"
]
}
},
{
"table": {
"table_name": "q_categories",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"c_status",
"p_category_id"
],
"key": "PRIMARY",
"used_key_parts": [
"category_id"
],
"key_length": "3",
"ref": [
"portal.q_products_categories.category_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 6,
"filtered": "20.00",
"cost_info": {
"read_cost": "30.00",
"eval_cost": "1.20",
"prefix_cost": "144.01",
"data_read_per_join": "15K"
},
"used_columns": [
"category_id",
"usergroup_ids",
"status"
],
"attached_condition": "(((`portal`.`q_categories`.`usergroup_ids` = '') or find_in_set(0,`portal`.`q_categories`.`usergroup_ids`) or find_in_set(1,`portal`.`q_categories`.`usergroup_ids`)) and (`portal`.`q_categories`.`status` in ('A','H')))"
}
}
]
}
}
}
Result
product_id |
category_ids |
position |
2717 |
5M |
|
2718 |
5M |
|
2719 |
5M |
|
2720 |
5M |
|
2721 |
5M |
|
2722 |
39M |
|
2723 |
4M |
|
2725 |
5M |
|
2726 |
39M |
|
2727 |
4M |
|
2728 |
5M |
|
2729 |
5M |
|
2730 |
39M |
|
2731 |
5M |
|
2732 |
5M |
|
2733 |
4M |
|
2867 |
4M |
|
2868 |
4M |
|
2869 |
4M |
|
2870 |
4M |
|
2871 |
4M |
|
2872 |
5M |
|
2873 |
5M |
|
2874 |
5M |
|
2875 |
4M |
|
2876 |
5M |
|
2877 |
5M |
|
2878 |
5M |
|
2879 |
5M |
|
2880 |
4M |
|