Query time 0.00097
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "60.21"
},
"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": 17,
"rows_produced_per_join": 17,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (14449,14450,14451,14452,14453,14454,14455,14456,14457,14458,14459,14460,14461,14462,14463,14464))",
"cost_info": {
"read_cost": "36.41",
"eval_cost": "3.40",
"prefix_cost": "39.81",
"data_read_per_join": "272"
},
"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": 3,
"filtered": "20.00",
"cost_info": {
"read_cost": "17.00",
"eval_cost": "0.68",
"prefix_cost": "60.21",
"data_read_per_join": "8K"
},
"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 |
14449 |
401M |
14450 |
299M |
14451 |
401M |
14452 |
383M |
14453 |
197M |
14454 |
383M |
14455 |
383M |
14456 |
383M |
14457 |
194M |
14458 |
194M |
14459 |
413M |
14460 |
412M |
14461 |
413M |
14462 |
413M |
14463 |
195M |
14464 |
413M |