Query time 0.00197
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "27.61"
},
"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": 16,
"rows_produced_per_join": 16,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "4.25",
"eval_cost": "3.20",
"prefix_cost": "7.45",
"data_read_per_join": "12K"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
],
"attached_condition": "((`webmarco`.`pfv`.`feature_id` in (548,549,626,860)) and (`webmarco`.`pfv`.`product_id` in (152072,431802,152081,359758)) 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": "16.00",
"eval_cost": "0.16",
"prefix_cost": "26.65",
"data_read_per_join": "934"
},
"used_columns": [
"variant_id",
"feature_id",
"position"
],
"attached_condition": "(`webmarco`.`fv`.`feature_id` = `webmarco`.`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": [
"webmarco.pfv.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.80",
"eval_cost": "0.16",
"prefix_cost": "27.61",
"data_read_per_join": "3K"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
}
]
}
}
Result
feature_id |
product_id |
variant_id |
position |
variant |
548 |
152072 |
8172 |
0 |
42 |
548 |
152081 |
1193 |
0 |
S |
548 |
359758 |
1465 |
0 |
One Size |
549 |
152072 |
1199 |
0 |
Blue |
549 |
152081 |
1199 |
0 |
Blue |
626 |
431802 |
7162 |
4 |
5-6 Years |
860 |
359758 |
64477 |
0 |
Brown |