Query time 0.00164
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "23.22"
},
"ordering_operation": {
"using_temporary_table": true,
"using_filesort": true,
"cost_info": {
"sort_cost": "4.28"
},
"nested_loop": [
{
"table": {
"table_name": "c",
"access_type": "range",
"possible_keys": [
"PRIMARY",
"product_id"
],
"key": "product_id",
"used_key_parts": [
"product_id"
],
"key_length": "3",
"rows_examined_per_scan": 8,
"rows_produced_per_join": 8,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "2.62",
"eval_cost": "1.60",
"prefix_cost": "4.22",
"data_read_per_join": "64"
},
"used_columns": [
"option_id",
"product_id"
],
"attached_condition": "((`webmarco`.`c`.`product_id` in (349645,349646,349647,349648,349649,349650,349651,349652)) and (`webmarco`.`c`.`option_id` is not null))"
}
},
{
"table": {
"table_name": "a",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"c_status"
],
"key": "PRIMARY",
"used_key_parts": [
"option_id"
],
"key_length": "3",
"ref": [
"webmarco.c.option_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 4,
"filtered": "53.45",
"cost_info": {
"read_cost": "8.00",
"eval_cost": "0.86",
"prefix_cost": "13.82",
"data_read_per_join": "12K"
},
"used_columns": [
"option_id",
"product_id",
"company_id",
"option_type",
"inventory",
"regexp",
"required",
"multiupload",
"allowed_extensions",
"max_file_size",
"missing_variants_handling",
"status",
"position",
"value",
"google_export_name_option"
],
"attached_condition": "((`webmarco`.`a`.`product_id` = 0) and (`webmarco`.`a`.`status` = 'A'))"
}
},
{
"table": {
"table_name": "b",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"option_id",
"lang_code"
],
"key_length": "9",
"ref": [
"webmarco.c.option_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 4,
"filtered": "100.00",
"cost_info": {
"read_cost": "4.28",
"eval_cost": "0.86",
"prefix_cost": "18.95",
"data_read_per_join": "14K"
},
"used_columns": [
"option_id",
"lang_code",
"option_name",
"internal_option_name",
"option_text",
"description",
"comment",
"inner_hint",
"incorrect_message"
]
}
}
]
}
}
}