Query time 0.00082
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "143.41"
},
"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": 49,
"rows_produced_per_join": 49,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (29666,29667,29668,29669,29670,29671,29672,29673,29674,29675,29676,29677,29678,29679,29680,29681))",
"cost_info": {
"read_cost": "74.81",
"eval_cost": "9.80",
"prefix_cost": "84.61",
"data_read_per_join": "784"
},
"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": 9,
"filtered": "20.00",
"cost_info": {
"read_cost": "49.00",
"eval_cost": "1.96",
"prefix_cost": "143.41",
"data_read_per_join": "25K"
},
"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 |
29666 |
545M |
29667 |
401M |
29668 |
154M |
29669 |
383M |
29670 |
189M |
29671 |
195M |
29672 |
204M |
29673 |
385M |
29674 |
401M |
29675 |
261M |
29676 |
545M |
29677 |
402M |
29678 |
195M |
29679 |
401M |
29680 |
443M |
29681 |
378M |