Query time 0.00067
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "65.41"
},
"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": 19,
"rows_produced_per_join": 19,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (30336,30337,30338,30339,30340,30341,30342,30344,30345,30346,30348,30349,30350,30351,30352,30353))",
"cost_info": {
"read_cost": "38.81",
"eval_cost": "3.80",
"prefix_cost": "42.61",
"data_read_per_join": "304"
},
"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": "19.00",
"eval_cost": "0.76",
"prefix_cost": "65.41",
"data_read_per_join": "10K"
},
"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 |
30336 |
16M |
30337 |
17M |
30338 |
383M |
30339 |
529M |
30340 |
301M |
30341 |
301M |
30342 |
598M |
30344 |
454M |
30345 |
597M |
30346 |
523M |
30348 |
597M |
30349 |
428M |
30350 |
96M |
30351 |
16M |
30352 |
16M |
30353 |
16M |