使用 Golang 将嵌套数据插入 BigQuery

Insert nested data into BigQuery using Golang

我可以使用 Golang 将平面对象插入 BigQuery - 如何将嵌套数据插入 table?

我的 BigQuery 架构如下所示(来自示例):

[{
    "name": "kind",
    "mode": "nullable",
    "type": "string"
  },
  {
    "name": "fullName",
    "type": "string",
    "mode": "required"
  },
  { "name": "visit",
    "type": "record",
    "mode": "repeated",
    "fields": [
    {
       "name": "time",
       "type": "timestamp",
       "mode": "nullable"
    },
    {
       "name": "duration",
       "type": "integer",
       "mode": "nullable"
    }
   ]
  }
]

我第一次尝试插入是这样的(示例):

func ExampleInsert(f string,) {

  jsonRow := make(map[string]bigquery.JsonValue)

  bq, _ := bigquery.New(client)
  request := new(bigquery.TableDataInsertAllRequest)

  rows := make([]*bigquery.TableDataInsertAllRequestRows, 1)

  jsonRow["kind"] = bigquery.JsonValue(kind)
  jsonRow["visit_duration"] = bigquery.JsonValue(duration)

  rows[i] = new(bigquery.TableDataInsertAllRequestRows)
  rows[i].Json = jsonRow

  bq.Tabledata.InsertAll(projectID, "visits", "visitsv4", request)
  ...
}

压平和插入没有问题。我只是在使用 visit_duration

但是,我需要遍历一个切片并添加到访问记录中。我试图构建一个 visit 对象(没有循环测试)并将其添加到该行但它没有插入并且我没有得到任何错误:

func ExampleInsert(f string,) {

  jsonRow := make(map[string]bigquery.JsonValue)

  bq, _ := bigquery.New(client)
  request := new(bigquery.TableDataInsertAllRequest)

  rows := make([]*bigquery.TableDataInsertAllRequestRows, 1)

  jsonRow["kind"] = bigquery.JsonValue(kind)

  visits := make([]*bigquery.TableDataInsertAllRequestRows, 1)

  jsonVisit := make(map[string]bigquery.JsonValue)
  jsonVisit["duration"] = rand.Intn(1000)
  visits[0] = new(bigquery.TableDataInsertAllRequestRows)
  visits[0].Json = jsonVisit

  jsonRow["visit"] = visits

  rows[i] = new(bigquery.TableDataInsertAllRequestRows)
  rows[i].Json = jsonRow

  bq.Tabledata.InsertAll(projectID, "visits", "visitsv4", request)

  _, err := Call.Do()
}

---[解决方案]----

按照评论中的建议,我也尝试创建一个切片然后附加访问:

var visits []bigquery.JsonValue
visit := make(map[string]bigquery.JsonValue)
visit["duration"] = rand.Intn(100)
visits = append(visits, visit)

jsonRow["visit"] = visits

我可以确认这确实有效 :) 对于那些阅读本文的人来说,它最初不是的原因,即使在添加切片之后,是因为我复制了 table。在这样做的过程中,我也使结果变平了。小心。

访问次数应该是 bigquery.JsonValue 的一部分我不确定你为什么使用:TableDataInsertAllRequestRows 应该只对负载描述符使用一次。

var visits []bigquery.JsonValue
visit := make(map[string]bigquery.JsonValue)
visit["duration"] = rand.Intn(100)
visits = append(visits, visit)

jsonRow["visit"] = visits

ps。还要确保你的架构扁平化