Query time 0.00073
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "70.61"
},
"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": 21,
"rows_produced_per_join": 21,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (31121,31122,31123,31124,31125,31126,31127,31128,31129,31130,31131,31132,31133,31134,31135,31136))",
"cost_info": {
"read_cost": "41.21",
"eval_cost": "4.20",
"prefix_cost": "45.41",
"data_read_per_join": "336"
},
"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": 4,
"filtered": "20.00",
"cost_info": {
"read_cost": "21.00",
"eval_cost": "0.84",
"prefix_cost": "70.61",
"data_read_per_join": "11K"
},
"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 |
31121 |
555M |
31122 |
154M |
31123 |
370M |
31124 |
64M |
31125 |
64M |
31126 |
576M |
31127 |
254M |
31128 |
596M |
31129 |
529M |
31130 |
477M |
31131 |
507M |
31132 |
299M |
31133 |
94M |
31134 |
189M |
31135 |
329M |
31136 |
477M |