Query time 0.00086
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "138.61"
},
"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": 41,
"rows_produced_per_join": 41,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (32753,32754,32755,32756,32757,32758,32759,32760,32761,32762,32763,32764,32765,32766,32767,32768,32769,32770,32771,32772,32773,32774,32775,32776,32777,32778,32779,32780,32781,32782,32783,32784))",
"cost_info": {
"read_cost": "81.21",
"eval_cost": "8.20",
"prefix_cost": "89.41",
"data_read_per_join": "656"
},
"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": 8,
"filtered": "20.00",
"cost_info": {
"read_cost": "41.00",
"eval_cost": "1.64",
"prefix_cost": "138.61",
"data_read_per_join": "21K"
},
"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 |
32753 |
97M |
32754 |
97M |
32755 |
97M |
32756 |
97M |
32757 |
97M |
32758 |
97M |
32759 |
97M |
32760 |
96M |
32761 |
96M |
32762 |
96M |
32763 |
96M |
32764 |
97M |
32765 |
97M |
32766 |
97M |
32767 |
97M |
32768 |
97M |
32769 |
97M |
32770 |
97M |
32771 |
97M |
32772 |
96M |
32773 |
96M |
32774 |
96M |
32775 |
96M |
32776 |
96M |
32777 |
96M |
32778 |
96M |
32779 |
96M |
32780 |
96M |
32781 |
96M |
32782 |
96M |
32783 |
96M |
32784 |
96M |