Query time 0.00082
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "117.81"
},
"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": 33,
"rows_produced_per_join": 33,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (9869,9870,9871,9872,9873,9874,9875,9876,9877,9878,9879,9880,9881,9882,9883,9884,9885,9886,9887,9888,9889,9890,9891,9892,9893,9894,9895,9896,9897,9898,9899,9900))",
"cost_info": {
"read_cost": "71.61",
"eval_cost": "6.60",
"prefix_cost": "78.21",
"data_read_per_join": "528"
},
"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": 6,
"filtered": "20.00",
"cost_info": {
"read_cost": "33.00",
"eval_cost": "1.32",
"prefix_cost": "117.81",
"data_read_per_join": "17K"
},
"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 |
9869 |
512M |
9870 |
383M |
9871 |
512M |
9872 |
383M |
9873 |
383M |
9874 |
419M |
9875 |
419M |
9876 |
419M |
9877 |
419M |
9878 |
419M |
9879 |
419M |
9880 |
419M |
9881 |
419M |
9882 |
419M |
9883 |
419M |
9884 |
419M |
9885 |
419M |
9886 |
419M |
9887 |
419M |
9888 |
419M |
9889 |
419M |
9890 |
419M |
9891 |
419M |
9892 |
419M |
9893 |
419M |
9894 |
419M |
9895 |
419M |
9896 |
419M |
9897 |
419M |
9898 |
419M |
9899 |
419M |
9900 |
512M |