Query time 0.00095
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "5.59"
},
"ordering_operation": {
"using_temporary_table": true,
"using_filesort": true,
"cost_info": {
"sort_cost": "2.77"
},
"nested_loop": [
{
"table": {
"table_name": "c",
"access_type": "index",
"possible_keys": [
"PRIMARY",
"product_id"
],
"key": "PRIMARY",
"used_key_parts": [
"option_id",
"product_id"
],
"key_length": "6",
"rows_examined_per_scan": 3,
"rows_produced_per_join": 3,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "0.50",
"eval_cost": "0.30",
"prefix_cost": "0.80",
"data_read_per_join": "24"
},
"used_columns": [
"option_id",
"product_id"
],
"attached_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`c`.`product_id` in (8607,8700,8725,8798,8807,8271,8274,8278,8279,8285,8287,8330,8333,8374,8389,8405,8430,8458,8465,8516,8518,8537,8571,8582,8584,8588,8599,8726,8728,8755,8756,8803,8809,8268,8331,8334,8378,8383,8436,8442,8462,8539,8541,8579,8583,8606,8727,8239,8270,8286,8376,8384,8401,8402,8437,8467,8468,8515,8531,8533,8542,8616,8698,8707,8386,8404,8449,8522,8591,8592,8598,8786,8808)) and (`softwarepirmam_hewadelivard_cscart_4`.`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": [
"softwarepirmam_hewadelivard_cscart_4.c.option_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 2,
"filtered": "92.31",
"cost_info": {
"read_cost": "0.75",
"eval_cost": "0.28",
"prefix_cost": "1.85",
"data_read_per_join": "6K"
},
"used_columns": [
"option_id",
"product_id",
"company_id",
"option_type",
"regexp",
"required",
"multiupload",
"allowed_extensions",
"max_file_size",
"missing_variants_handling",
"status",
"position",
"value"
],
"attached_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`a`.`product_id` = 0) and (`softwarepirmam_hewadelivard_cscart_4`.`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": [
"softwarepirmam_hewadelivard_cscart_4.c.option_id",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 2,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.69",
"eval_cost": "0.28",
"prefix_cost": "2.82",
"data_read_per_join": "9K"
},
"used_columns": [
"option_id",
"lang_code",
"option_name",
"internal_option_name",
"option_text",
"description",
"comment",
"inner_hint",
"incorrect_message"
]
}
}
]
}
}
}