Query time 0.00098
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "2.56"
},
"nested_loop": [
{
"table": {
"table_name": "pfv",
"access_type": "range",
"possible_keys": [
"PRIMARY",
"fl",
"variant_id",
"lang_code",
"product_id",
"fpl",
"idx_product_feature_variant_id"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id",
"product_id"
],
"key_length": "6",
"rows_examined_per_scan": 4,
"rows_produced_per_join": 3,
"filtered": "99.99",
"using_index": true,
"cost_info": {
"read_cost": "0.69",
"eval_cost": "0.40",
"prefix_cost": "1.09",
"data_read_per_join": "3K"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
],
"attached_condition": "((`cscartdb`.`pfv`.`feature_id` in (1199,1205)) and (`cscartdb`.`pfv`.`product_id` in (17379,34632)) and (`cscartdb`.`pfv`.`lang_code` = 'en'))"
}
},
{
"table": {
"table_name": "fv",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"feature_id"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id"
],
"key_length": "3",
"ref": [
"cscartdb.pfv.variant_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "5.00",
"cost_info": {
"read_cost": "1.00",
"eval_cost": "0.02",
"prefix_cost": "2.49",
"data_read_per_join": "233"
},
"used_columns": [
"variant_id",
"feature_id",
"position"
],
"attached_condition": "(`cscartdb`.`fv`.`feature_id` = `cscartdb`.`pfv`.`feature_id`)"
}
},
{
"table": {
"table_name": "fvd",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id",
"lang_code"
],
"key_length": "9",
"ref": [
"cscartdb.pfv.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.05",
"eval_cost": "0.02",
"prefix_cost": "2.56",
"data_read_per_join": "619"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
}
]
}
}
Result
feature_id |
product_id |
variant_id |
position |
variant |
1199 |
17379 |
4613 |
0 |
Full set/XS |
1205 |
34632 |
4679 |
0 |
XS |