Query time 0.00065
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "9.32"
},
"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": 5,
"rows_produced_per_join": 5,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "2.02",
"eval_cost": "1.00",
"prefix_cost": "3.02",
"data_read_per_join": "3K"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
],
"attached_condition": "((`webmarco`.`pfv`.`feature_id` = 626) and (`webmarco`.`pfv`.`product_id` in (396008,396009,396010,396011,396012)) 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": "5.00",
"eval_cost": "0.05",
"prefix_cost": "9.02",
"data_read_per_join": "292"
},
"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": "0.25",
"eval_cost": "0.05",
"prefix_cost": "9.32",
"data_read_per_join": "1K"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
}
]
}
}
Result
feature_id |
product_id |
variant_id |
position |
variant |
626 |
396008 |
7169 |
11 |
12-13 Years |
626 |
396009 |
7164 |
6 |
7-8 Years |
626 |
396010 |
7165 |
7 |
8-9 Years |
626 |
396011 |
7166 |
8 |
9-10 Years |
626 |
396012 |
7167 |
9 |
10-11 Years |