Query time 0.00109
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "21.21"
},
"ordering_operation": {
"using_filesort": true,
"cost_info": {
"sort_cost": "4.00"
},
"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": 4,
"rows_produced_per_join": 4,
"filtered": "100.00",
"index_condition": "((`eshopuga_upgr_4122`.`cscart_images_links`.`object_type` = 'product') and (`eshopuga_upgr_4122`.`cscart_images_links`.`type` = 'M') and (`eshopuga_upgr_4122`.`cscart_images_links`.`object_id` in (1927,1937)))",
"cost_info": {
"read_cost": "6.81",
"eval_cost": "0.80",
"prefix_cost": "7.61",
"data_read_per_join": "384"
},
"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": 4,
"filtered": "100.00",
"cost_info": {
"read_cost": "4.00",
"eval_cost": "0.80",
"prefix_cost": "12.41",
"data_read_per_join": "3K"
},
"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": 4,
"filtered": "100.00",
"cost_info": {
"read_cost": "4.00",
"eval_cost": "0.80",
"prefix_cost": "17.21",
"data_read_per_join": "2K"
},
"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)"
}
}
]
}
}
}
Result
image_id |
image_path |
image_x |
image_y |
is_high_res |
pair_id |
object_id |
object_type |
detailed_id |
type |
position |
alt |
images_image_id |
0 |
|
|
|
|
3339 |
1927 |
product |
3457 |
M |
0 |
|
|
0 |
|
|
|
|
3349 |
1937 |
product |
3467 |
M |
0 |
|
|