Query time 0.00149
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "12.64"
},
"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": "lang_code",
"used_key_parts": [
"lang_code",
"feature_id",
"product_id"
],
"key_length": "12",
"rows_examined_per_scan": 7,
"rows_produced_per_join": 7,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "2.43",
"eval_cost": "1.40",
"prefix_cost": "3.83",
"data_read_per_join": "5K"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
],
"attached_condition": "((`webmarco`.`pfv`.`feature_id` = 626) and (`webmarco`.`pfv`.`product_id` in (396058,396059,396060,396061,396062,396063,396064)) and (`webmarco`.`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": [
"webmarco.pfv.variant_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "5.00",
"cost_info": {
"read_cost": "7.00",
"eval_cost": "0.07",
"prefix_cost": "12.23",
"data_read_per_join": "408"
},
"used_columns": [
"variant_id",
"feature_id",
"position"
],
"attached_condition": "(`webmarco`.`fv`.`feature_id` = 626)"
}
},
{
"table": {
"table_name": "fvd",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id",
"lang_code"
],
"key_length": "9",
"ref": [
"webmarco.pfv.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.35",
"eval_cost": "0.07",
"prefix_cost": "12.65",
"data_read_per_join": "1K"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
}
]
}
}
Result
feature_id |
product_id |
variant_id |
position |
variant |
626 |
396058 |
7166 |
8 |
9-10 Years |
626 |
396059 |
67588 |
0 |
15-16 Years |
626 |
396060 |
7168 |
10 |
11-12 Years |
626 |
396061 |
7169 |
11 |
12-13 Years |
626 |
396062 |
7170 |
12 |
13-14 Years |
626 |
396063 |
7171 |
13 |
14-15 Years |
626 |
396064 |
7167 |
9 |
10-11 Years |