Query time 0.00137
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "206.65"
},
"ordering_operation": {
"using_filesort": true,
"grouping_operation": {
"using_temporary_table": true,
"using_filesort": false,
"nested_loop": [
{
"table": {
"table_name": "cscart_product_feature_variants",
"access_type": "ref",
"possible_keys": [
"PRIMARY",
"feature_id"
],
"key": "feature_id",
"used_key_parts": [
"feature_id"
],
"key_length": "3",
"ref": [
"const"
],
"rows_examined_per_scan": 6,
"rows_produced_per_join": 6,
"filtered": "100.00",
"cost_info": {
"read_cost": "1.50",
"eval_cost": "0.60",
"prefix_cost": "2.10",
"data_read_per_join": "6K"
},
"used_columns": [
"variant_id",
"feature_id",
"position"
]
}
},
{
"table": {
"table_name": "cscart_product_feature_variant_descriptions",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id",
"lang_code"
],
"key_length": "9",
"ref": [
"cscartdb.cscart_product_feature_variants.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 6,
"filtered": "100.00",
"cost_info": {
"read_cost": "1.50",
"eval_cost": "0.60",
"prefix_cost": "4.20",
"data_read_per_join": "18K"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
},
{
"table": {
"table_name": "cscart_product_features_values",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"fl",
"variant_id",
"lang_code",
"product_id",
"fpl",
"idx_product_feature_variant_id"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
],
"key_length": "15",
"ref": [
"const",
"const",
"cscartdb.cscart_product_feature_variants.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 6,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "1.50",
"eval_cost": "0.60",
"prefix_cost": "6.30",
"data_read_per_join": "4K"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"lang_code"
]
}
},
{
"table": {
"table_name": "cscart_product_features",
"access_type": "const",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id"
],
"key_length": "3",
"ref": [
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 6,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.25",
"eval_cost": "0.60",
"prefix_cost": "7.15",
"data_read_per_join": "2K"
},
"used_columns": [
"feature_id",
"feature_type"
]
}
},
{
"table": {
"table_name": "cscart_seo_names",
"access_type": "ref",
"possible_keys": [
"PRIMARY",
"dispatch"
],
"key": "PRIMARY",
"used_key_parts": [
"object_id",
"type",
"dispatch",
"lang_code"
],
"key_length": "206",
"ref": [
"cscartdb.cscart_product_feature_variants.variant_id",
"const",
"const",
"const"
],
"rows_examined_per_scan": 95,
"rows_produced_per_join": 570,
"filtered": "100.00",
"cost_info": {
"read_cost": "142.50",
"eval_cost": "57.00",
"prefix_cost": "206.65",
"data_read_per_join": "966K"
},
"used_columns": [
"name",
"object_id",
"type",
"dispatch",
"path",
"lang_code"
]
}
}
]
}
}
}
}
Result
variant |
variant_id |
feature_id |
selected |
feature_type |
seo_name |
seo_path |
xs |
5985 |
1482 |
5985 |
S |
|
|
s |
5986 |
1482 |
|
S |
|
|
m |
5987 |
1482 |
|
S |
|
|
l |
5988 |
1482 |
|
S |
|
|
xl |
5989 |
1482 |
|
S |
|
|
xxl |
5990 |
1482 |
|
S |
|
|