Query time 0.00092
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "115.21"
},
"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": 32,
"rows_produced_per_join": 32,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (6950,6951,6952,6953,6954,6955,6956,6112,6113,6114,6115,6116,6117,6118,6119,6120,6121,6122,6123,6124,6125,6126,6127,6128,6129,6130,6131,6132,6133,6134,6135,6136))",
"cost_info": {
"read_cost": "70.41",
"eval_cost": "6.40",
"prefix_cost": "76.81",
"data_read_per_join": "512"
},
"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": "32.00",
"eval_cost": "1.28",
"prefix_cost": "115.21",
"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 |
6112 |
402M |
6113 |
402M |
6114 |
402M |
6115 |
402M |
6116 |
402M |
6117 |
402M |
6118 |
402M |
6119 |
199M |
6120 |
402M |
6121 |
402M |
6122 |
402M |
6123 |
402M |
6124 |
402M |
6125 |
402M |
6126 |
402M |
6127 |
402M |
6128 |
402M |
6129 |
402M |
6130 |
402M |
6131 |
402M |
6132 |
193,402M |
6133 |
402M |
6134 |
402M |
6135 |
193,402M |
6136 |
402M |
6950 |
512M |
6951 |
512M |
6952 |
512M |
6953 |
512M |
6954 |
512M |
6955 |
512M |
6956 |
512M |