Query time 0.00215
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "382.81"
},
"ordering_operation": {
"using_filesort": true,
"cost_info": {
"sort_cost": "66.00"
},
"nested_loop": [
{
"table": {
"table_name": "cscart_images_links",
"access_type": "range",
"possible_keys": [
"object_id"
],
"key": "object_id",
"used_key_parts": [
"object_id",
"object_type",
"type"
],
"key_length": "81",
"rows_examined_per_scan": 66,
"rows_produced_per_join": 66,
"filtered": "100.00",
"index_condition": "((`eshopuga_upgr_4122`.`cscart_images_links`.`object_type` = 'variant_image') and (`eshopuga_upgr_4122`.`cscart_images_links`.`type` = 'V') and (`eshopuga_upgr_4122`.`cscart_images_links`.`object_id` in (748,747,780,779,782,781,788,787,790,789,800,799,812,811,816,815,820,819,826,825,830,829,832,831,838,837,844,843,850,849,856,855,862,861,896,895,898,897,904,903,906,905,916,915,928,927,932,931,936,935,942,941,946,945,948,947,954,953,960,959,966,965,972,971,978,977)))",
"cost_info": {
"read_cost": "145.21",
"eval_cost": "13.20",
"prefix_cost": "158.41",
"data_read_per_join": "6K"
},
"used_columns": [
"pair_id",
"object_id",
"object_type",
"image_id",
"detailed_id",
"type",
"position"
]
}
},
{
"table": {
"table_name": "cscart_images",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"image_id"
],
"key_length": "4",
"ref": [
"eshopuga_upgr_4122.cscart_images_links.image_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 66,
"filtered": "100.00",
"cost_info": {
"read_cost": "66.00",
"eval_cost": "13.20",
"prefix_cost": "237.61",
"data_read_per_join": "50K"
},
"used_columns": [
"image_id",
"image_path",
"image_x",
"image_y",
"is_high_res"
]
}
},
{
"table": {
"table_name": "cscart_common_descriptions",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"object_id",
"lang_code",
"object_holder"
],
"key_length": "107",
"ref": [
"eshopuga_upgr_4122.cscart_images.image_id",
"const",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 66,
"filtered": "100.00",
"cost_info": {
"read_cost": "66.00",
"eval_cost": "13.20",
"prefix_cost": "316.81",
"data_read_per_join": "39K"
},
"used_columns": [
"object_id",
"description",
"lang_code",
"object_holder"
],
"attached_condition": "<if>(is_not_null_compl(cscart_common_descriptions), (`eshopuga_upgr_4122`.`cscart_common_descriptions`.`object_id` = `eshopuga_upgr_4122`.`cscart_images`.`image_id`), true)"
}
}
]
}
}
}