Query time 0.00082
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "128.21"
},
"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": 37,
"rows_produced_per_join": 37,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (32721,32722,32723,32724,32725,32726,32727,32728,32729,32730,32731,32732,32733,32734,32735,32736,32737,32738,32739,32740,32741,32742,32743,32744,32745,32746,32747,32748,32749,32750,32751,32752))",
"cost_info": {
"read_cost": "76.41",
"eval_cost": "7.40",
"prefix_cost": "83.81",
"data_read_per_join": "592"
},
"used_columns": [
"product_id",
"category_id",
"link_type"
]
}
},
{
"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": 7,
"filtered": "20.00",
"cost_info": {
"read_cost": "37.00",
"eval_cost": "1.48",
"prefix_cost": "128.21",
"data_read_per_join": "19K"
},
"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 |
32721 |
96M |
32722 |
96M |
32723 |
96M |
32724 |
96M |
32725 |
96M |
32726 |
96M |
32727 |
96M |
32728 |
96M |
32729 |
96M |
32730 |
96M |
32731 |
96M |
32732 |
96M |
32733 |
96M |
32734 |
96M |
32735 |
96M |
32736 |
96M |
32737 |
96M |
32738 |
96M |
32739 |
96M |
32740 |
96M |
32741 |
96M |
32742 |
96M |
32743 |
96M |
32744 |
96M |
32745 |
96M |
32746 |
96M |
32747 |
96M |
32748 |
96M |
32749 |
96M |
32750 |
96M |
32751 |
97M |
32752 |
97M |