Query time 0.00087
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "0.97"
},
"ordering_operation": {
"using_temporary_table": true,
"using_filesort": true,
"nested_loop": [
{
"table": {
"table_name": "v",
"access_type": "ref",
"possible_keys": [
"PRIMARY",
"fl",
"variant_id",
"lang_code",
"product_id",
"fpl",
"idx_product_feature_variant_id"
],
"key": "product_id",
"used_key_parts": [
"product_id"
],
"key_length": "3",
"ref": [
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "50.00",
"index_condition": "((`dev2`.`v`.`lang_code` = 'ru') and (`dev2`.`v`.`feature_id` is not null))",
"cost_info": {
"read_cost": "0.64",
"eval_cost": "0.05",
"prefix_cost": "0.74",
"data_read_per_join": "395"
},
"used_columns": [
"feature_id",
"product_id",
"variant_id",
"value",
"value_int",
"lang_code"
]
}
},
{
"table": {
"table_name": "f",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"status"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id"
],
"key_length": "3",
"ref": [
"dev2.v.feature_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "8.05",
"cost_info": {
"read_cost": "0.12",
"eval_cost": "0.00",
"prefix_cost": "0.91",
"data_read_per_join": "64"
},
"used_columns": [
"feature_id",
"feature_code",
"purpose",
"feature_type",
"categories_path",
"parent_id",
"display_on_product",
"display_on_catalog",
"display_on_header",
"status",
"position"
],
"attached_condition": "((`dev2`.`f`.`status` = 'A') and (`dev2`.`f`.`display_on_catalog` = 'Y') and ((`dev2`.`f`.`categories_path` = '') or (0 <> find_in_set(558,`dev2`.`f`.`categories_path`)) or (0 <> find_in_set(712,`dev2`.`f`.`categories_path`))) and (if(`dev2`.`f`.`parent_id`,(/* select#2 */ select `dev2`.`df`.`status` from `dev2`.`cscart_product_features` `df` where (`dev2`.`df`.`feature_id` = `dev2`.`f`.`parent_id`)),'A') = 'A') and ((`dev2`.`v`.`variant_id` <> 0) or ((`dev2`.`f`.`feature_type` <> 'C') and (`dev2`.`v`.`value` <> '')) or (`dev2`.`f`.`feature_type` = 'C') or (`dev2`.`v`.`value_int` <> 0)))",
"attached_subqueries": [
{
"dependent": true,
"cacheable": false,
"query_block": {
"select_id": 2,
"cost_info": {
"query_cost": "0.35"
},
"table": {
"table_name": "df",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id"
],
"key_length": "3",
"ref": [
"dev2.f.parent_id"
],
"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": "1K"
},
"used_columns": [
"feature_id",
"status"
]
}
}
}
]
}
},
{
"table": {
"table_name": "fd",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id",
"lang_code"
],
"key_length": "9",
"ref": [
"dev2.v.feature_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.01",
"eval_cost": "0.00",
"prefix_cost": "0.92",
"data_read_per_join": "113"
},
"used_columns": [
"feature_id",
"description",
"internal_name",
"prefix",
"suffix",
"lang_code"
]
}
},
{
"table": {
"table_name": "fv",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id"
],
"key_length": "3",
"ref": [
"dev2.v.variant_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.01",
"eval_cost": "0.00",
"prefix_cost": "0.94",
"data_read_per_join": "62"
},
"used_columns": [
"variant_id",
"position"
]
}
},
{
"table": {
"table_name": "vd",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"variant_id",
"lang_code"
],
"key_length": "9",
"ref": [
"dev2.fv.variant_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.01",
"eval_cost": "0.00",
"prefix_cost": "0.95",
"data_read_per_join": "174"
},
"used_columns": [
"variant_id",
"variant",
"lang_code"
]
}
},
{
"table": {
"table_name": "gf",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"feature_id"
],
"key_length": "3",
"ref": [
"dev2.f.parent_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.01",
"eval_cost": "0.00",
"prefix_cost": "0.97",
"data_read_per_join": "64"
},
"used_columns": [
"feature_id",
"feature_type",
"position"
],
"attached_condition": "<if>(is_not_null_compl(gf), (`dev2`.`gf`.`feature_type` = 'G'), true)"
}
}
]
}
}
}