Query time 0.00204
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "394.41"
},
"ordering_operation": {
"using_filesort": true,
"cost_info": {
"sort_cost": "68.00"
},
"nested_loop": [
{
"table": {
"table_name": "q_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": 68,
"rows_produced_per_join": 68,
"filtered": "100.00",
"index_condition": "((`portal`.`q_images_links`.`object_type` = 'variant_image') and (`portal`.`q_images_links`.`type` = 'V') and (`portal`.`q_images_links`.`object_id` in ('82','83','84','85','86','87','88','89','130','131','132','133','140','141','170','171','174','175','176','177','178','179','180','181','182','183','184','185','186','187','188','189','190','341','516','517','518','519','520','521','522','548','549','550','551','566','613','614','623','624','632','633','634','635','636','692','700','701','702','703','780','781','2703','2704','5652','6790','6791','6792')))",
"cost_info": {
"read_cost": "149.61",
"eval_cost": "13.60",
"prefix_cost": "163.21",
"data_read_per_join": "6K"
},
"used_columns": [
"pair_id",
"object_id",
"object_type",
"image_id",
"detailed_id",
"type",
"position"
]
}
},
{
"table": {
"table_name": "q_images",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"image_id"
],
"key_length": "4",
"ref": [
"portal.q_images_links.image_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 68,
"filtered": "100.00",
"cost_info": {
"read_cost": "68.00",
"eval_cost": "13.60",
"prefix_cost": "244.81",
"data_read_per_join": "52K"
},
"used_columns": [
"image_id",
"image_path",
"image_x",
"image_y",
"is_high_res"
]
}
},
{
"table": {
"table_name": "q_common_descriptions",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"object_id",
"lang_code",
"object_holder"
],
"key_length": "107",
"ref": [
"portal.q_images.image_id",
"const",
"const"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 68,
"filtered": "100.00",
"cost_info": {
"read_cost": "68.00",
"eval_cost": "13.60",
"prefix_cost": "326.41",
"data_read_per_join": "40K"
},
"used_columns": [
"object_id",
"description",
"lang_code",
"object_holder"
],
"attached_condition": "<if>(is_not_null_compl(q_common_descriptions), (`portal`.`q_common_descriptions`.`object_id` = `portal`.`q_images`.`image_id`), true)"
}
}
]
}
}
}