Query time 0.00075
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "88.81"
},
"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": 28,
"rows_produced_per_join": 28,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (29891,29892,29893,29894,29895,29896,29897,29898,29899,29900,29901,29902,29903,29904,29905,29906))",
"cost_info": {
"read_cost": "49.61",
"eval_cost": "5.60",
"prefix_cost": "55.21",
"data_read_per_join": "448"
},
"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": 5,
"filtered": "20.00",
"cost_info": {
"read_cost": "28.00",
"eval_cost": "1.12",
"prefix_cost": "88.81",
"data_read_per_join": "14K"
},
"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 |
29891 |
249M |
29892 |
532M |
29893 |
266M |
29894 |
435M |
29895 |
269M |
29896 |
509M |
29897 |
189M |
29898 |
565M |
29899 |
271M |
29900 |
269M |
29901 |
493M |
29902 |
459M |
29903 |
251M |
29904 |
204M |
29905 |
204M |
29906 |
459M |