Query time 0.00080
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "94.01"
},
"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": 30,
"rows_produced_per_join": 30,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (30386,30387,30388,30389,30390,30391,30392,30393,30394,30395,30396,30398,30399,30400,30401,30402))",
"cost_info": {
"read_cost": "52.01",
"eval_cost": "6.00",
"prefix_cost": "58.01",
"data_read_per_join": "480"
},
"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": "30.00",
"eval_cost": "1.20",
"prefix_cost": "94.01",
"data_read_per_join": "15K"
},
"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 |
30386 |
606M |
30387 |
419M |
30388 |
560M |
30389 |
410M |
30390 |
606M |
30391 |
383M |
30392 |
199M |
30393 |
419M |
30394 |
507M |
30395 |
560M |
30396 |
565M |
30398 |
385M |
30399 |
194,193M |
30400 |
383M |
30401 |
202M |
30402 |
193M |