Docs Home → MongoDB Manual

List Time Series Collections in a Database列出数据库中的时间序列集合

On this page本页内容

You can output a list of collections in a database and filter the results by a variety of properties, including collection type. You can use this functionality to list all time series collections in a database.您可以输出数据库中的集合列表，并按各种属性（包括集合类型）筛选结果。您可以使用此功能列出数据库中的所有时间序列集合。

Procedure过程

To list all time series collections in a database, use the listCollections command with a filter for { type: "timeseries" }:要列出数据库中的所有时间序列集合，请将listCollections命令与{ type: "timeseries" }的筛选器一起使用：

db.runCommand( {
   listCollections: 1,
   filter: { type: "timeseries" }
} )

Output输出

For time series collections, the output includes:对于时间序列集合，输出包括：

  • type: 'timeseries'
  • options: { timeseries: { ... } }

For example:例如：

{
  cursor: {
    id: Long("0"),
    ns: 'test.$cmd.listCollections',
    firstBatch: [
      {
        name: 'weather',
        type: 'timeseries',
        options: {
          timeseries: {
            timeField: 'timestamp',
            metaField: 'metadata',
            granularity: 'hours',
            bucketMaxSpanSeconds: 2592000
          }
        },
        info: { readOnly: false }
      }
    ]
  },
  ok: 1
}