Query time 0.00123
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "10.98"
},
"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": 6,
"rows_produced_per_join": 6,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "2.22",
"eval_cost": "1.20",
"prefix_cost": "3.42",
"data_read_per_join": "4K"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
],
"attached_condition": "((`webmarco`.`pfv`.`feature_id` = 860) and (`webmarco`.`pfv`.`product_id` in (435469,435470,435471,435472,435473,435474)) 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": "6.00",
"eval_cost": "0.06",
"prefix_cost": "10.62",
"data_read_per_join": "350"
},
"used_columns": [
"variant_id",
"feature_id",
"position"
],
"attached_condition": "(`webmarco`.`fv`.`feature_id` = 860)"
}
},
{
"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": "0.30",
"eval_cost": "0.06",
"prefix_cost": "10.98",
"data_read_per_join": "1K"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
}
]
}
}
Result
feature_id |
product_id |
variant_id |
position |
variant |
860 |
435469 |
67627 |
0 |
Apricot |
860 |
435470 |
65262 |
0 |
Baby Blue - White - Red |
860 |
435471 |
65265 |
0 |
Baby Pink |
860 |
435472 |
65266 |
0 |
Baby Pink - Purple |
860 |
435473 |
65276 |
0 |
Baby Pink - Powder - Pink |
860 |
435474 |
66133 |
0 |
Anthracite |