Query time 0.00086
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "151.61"
},
"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": 32,
"rows_produced_per_join": 32,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (8790,8791,8792,9050,9052,9053,9054,9055,9056,9057,9058,9817,9818,9819,9820,9821,9822,9823,9824,9825,9826,9827,9828,9829,9830,9831,9832,9833,9834,9835))",
"cost_info": {
"read_cost": "68.41",
"eval_cost": "6.40",
"prefix_cost": "74.81",
"data_read_per_join": "512"
},
"used_columns": [
"product_id",
"category_id",
"link_type"
]
}
},
{
"table": {
"table_name": "product_position_source",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"pt"
],
"key": "PRIMARY",
"used_key_parts": [
"category_id",
"product_id"
],
"key_length": "6",
"ref": [
"const",
"portal.q_products_categories.product_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 32,
"filtered": "100.00",
"cost_info": {
"read_cost": "32.00",
"eval_cost": "6.40",
"prefix_cost": "113.21",
"data_read_per_join": "512"
},
"used_columns": [
"product_id",
"category_id",
"position"
]
}
},
{
"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": 6,
"filtered": "20.00",
"cost_info": {
"read_cost": "32.00",
"eval_cost": "1.28",
"prefix_cost": "151.61",
"data_read_per_join": "16K"
},
"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 |
position |
8790 |
192M |
0 |
8791 |
192M |
0 |
8792 |
192M |
0 |
9050 |
192M |
0 |
9052 |
192M |
0 |
9053 |
192M |
0 |
9054 |
192M |
0 |
9055 |
192M |
0 |
9056 |
192M |
0 |
9057 |
192M |
0 |
9058 |
192M |
0 |
9817 |
192M |
0 |
9818 |
192M |
0 |
9819 |
192M |
0 |
9820 |
192M |
0 |
9821 |
192M |
0 |
9822 |
192M |
0 |
9823 |
192M |
0 |
9824 |
192M |
0 |
9825 |
192M |
0 |
9826 |
192M |
0 |
9827 |
192M |
0 |
9828 |
192M |
0 |
9829 |
192M |
0 |
9830 |
192M |
0 |
9831 |
192M |
0 |
9832 |
192M |
0 |
9833 |
192M |
0 |
9834 |
192M |
0 |
9835 |
192M |
0 |