Query time 0.00062
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "0.84"
},
"nested_loop": [
{
"table": {
"table_name": "pfv",
"access_type": "ref",
"possible_keys": [
"PRIMARY",
"fl",
"variant_id",
"lang_code",
"product_id",
"fpl",
"idx_product_feature_variant_id"
],
"key": "fpl",
"used_key_parts": [
"feature_id",
"product_id",
"lang_code"
],
"key_length": "12",
"ref": [
"const",
"const",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 1,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.25",
"eval_cost": "0.10",
"prefix_cost": "0.35",
"data_read_per_join": "792"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
]
}
},
{
"table": {
"table_name": "fv",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"feature_id"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id"
],
"key_length": "3",
"ref": [
"betaatif_store.pfv.variant_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "41.18",
"cost_info": {
"read_cost": "0.25",
"eval_cost": "0.04",
"prefix_cost": "0.70",
"data_read_per_join": "480"
},
"used_columns": [
"variant_id",
"feature_id",
"position"
],
"attached_condition": "(`betaatif_store`.`fv`.`feature_id` = 2)"
}
},
{
"table": {
"table_name": "fvd",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id",
"lang_code"
],
"key_length": "9",
"ref": [
"betaatif_store.pfv.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.10",
"eval_cost": "0.04",
"prefix_cost": "0.84",
"data_read_per_join": "1K"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
}
]
}
}
Result
feature_id |
product_id |
variant_id |
position |
variant |
2 |
453 |
7 |
3 |
160x230 CM |