Query time 0.00065
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "91.41"
},
"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": 29,
"rows_produced_per_join": 29,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (29875,29876,29877,29878,29879,29880,29881,29882,29883,29884,29885,29886,29887,29888,29889,29890))",
"cost_info": {
"read_cost": "50.81",
"eval_cost": "5.80",
"prefix_cost": "56.61",
"data_read_per_join": "464"
},
"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": "29.00",
"eval_cost": "1.16",
"prefix_cost": "91.41",
"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 |
29875 |
269M |
29876 |
197M |
29877 |
251M |
29878 |
386M |
29879 |
565M |
29880 |
249M |
29881 |
565M |
29882 |
249M |
29883 |
269M |
29884 |
565M |
29885 |
489M |
29886 |
489M |
29887 |
565M |
29888 |
572M |
29889 |
507M |
29890 |
459M |