Query time 0.00067
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "96.61"
},
"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": 31,
"rows_produced_per_join": 31,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (30403,30404,30405,30406,30407,30408,30659,30660,30661,30662,30663,30664,30665,30666,30667,30668))",
"cost_info": {
"read_cost": "53.21",
"eval_cost": "6.20",
"prefix_cost": "59.41",
"data_read_per_join": "496"
},
"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": "31.00",
"eval_cost": "1.24",
"prefix_cost": "96.61",
"data_read_per_join": "16K"
},
"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 |
30403 |
193M |
30404 |
383M |
30405 |
27M |
30406 |
429,431M |
30407 |
429M |
30408 |
27M |
30659 |
597M |
30660 |
412M |
30661 |
565M |
30662 |
413M |
30663 |
432M |
30664 |
576M |
30665 |
79M |
30666 |
523M |
30667 |
414M |
30668 |
204M |