Query time 0.00066
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "86.21"
},
"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": 27,
"rows_produced_per_join": 27,
"filtered": "100.00",
"index_condition": "(`portal`.`q_products_categories`.`product_id` in (9219,9220,9221,9222,9223,9224,9225,9226,9227,9228,9229,9230,9231,9232,9233,9234))",
"cost_info": {
"read_cost": "48.41",
"eval_cost": "5.40",
"prefix_cost": "53.81",
"data_read_per_join": "432"
},
"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": 5,
"filtered": "20.00",
"cost_info": {
"read_cost": "27.00",
"eval_cost": "1.08",
"prefix_cost": "86.21",
"data_read_per_join": "14K"
},
"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 |
9219 |
206M |
9220 |
206M |
9221 |
418M |
9222 |
418M |
9223 |
204M |
9224 |
418M |
9225 |
418M |
9226 |
418M |
9227 |
418M |
9228 |
418M |
9229 |
418M |
9230 |
418M |
9231 |
418M |
9232 |
418M |
9233 |
418M |
9234 |
418M |