Query time 0.00092
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "128.21"
},
"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": 37,
"rows_produced_per_join": 37,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (32517,32518,32520,32522,32523,32524,32525,32526,32527,32528,32529,32530,32532,32533,32534,32535,32537,32538,32539,32540,32541,32542,32543,32544,32545,32546,32548,32549,32550,32551,32552,32553))",
"cost_info": {
"read_cost": "76.41",
"eval_cost": "7.40",
"prefix_cost": "83.81",
"data_read_per_join": "592"
},
"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": 7,
"filtered": "20.00",
"cost_info": {
"read_cost": "37.00",
"eval_cost": "1.48",
"prefix_cost": "128.21",
"data_read_per_join": "19K"
},
"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 |
32517 |
97M |
32518 |
97M |
32520 |
96M |
32522 |
96M |
32523 |
96M |
32524 |
96M |
32525 |
96M |
32526 |
97M |
32527 |
97M |
32528 |
97M |
32529 |
97M |
32530 |
96M |
32532 |
96M |
32533 |
97M |
32534 |
97M |
32535 |
97M |
32537 |
96M |
32538 |
96M |
32539 |
96M |
32540 |
96M |
32541 |
96M |
32542 |
96M |
32543 |
96M |
32544 |
97M |
32545 |
97M |
32546 |
96M |
32548 |
96M |
32549 |
96M |
32550 |
96M |
32551 |
96M |
32552 |
97M |
32553 |
97M |