我正在使用Gorm作为我的GO应用程序中的ORM。我将所有模型结构嵌入。由于某种原因，我认为

Question

updated_at

自动指数的推荐方法是什么？ low查询分析显示日期范围的顺序扫描查询：

created_at架构定义确认没有索引

updated_at

和

+----------------------------------------------------------------------------------------------------------------------------------+
| QUERY PLAN                                                                                                                       |
|----------------------------------------------------------------------------------------------------------------------------------|
| Aggregate  (cost=969.33..969.34 rows=1 width=8) (actual time=2.675..2.676 rows=1 loops=1)                                        |
|   ->  Sort  (cost=969.31..969.31 rows=1 width=214) (actual time=2.672..2.672 rows=0 loops=1)                                     |
|         Sort Key: analyses.updated_at DESC                                                                               |
|         Sort Method: quicksort  Memory: 25kB                                                                                     |
|         ->  Seq Scan on analyses  (cost=0.00..969.30 rows=1 width=214) (actual time=2.666..2.666 rows=0 loops=1)         |
|               Filter: ((status = 3) AND (updated_at < (now())::date) AND (updated_at >= ((now() + '00:00:10'::interval))::date)) |
|               Rows Removed by Filter: 9012                                                                                       |
| Planning Time: 0.217 ms                                                                                                          |
| Execution Time: 2.713 ms 

。

created_at

您应该使用以下方式在模型中在模型中索引

updated_at

和

Indexes:
    "analyses_pkey" PRIMARY KEY, btree (id)
    "idx_ecosystem_name_version" UNIQUE, btree (ecosystem, name, version)
    "idx_analyses_external_id" UNIQUE, btree (external_id)
    "idx_analyses_deleted_at" btree (deleted_at)
    "idx_analyses_source" btree (source)

字段：

created_at