Time Series Collections

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Overview

Create a Time Series Collection
Query a Time Series Collection
Additional Information

Overview

In this guide, you can learn about time series collections in MongoDB, and how to interact with them in the MongoDB Go Driver.

Time series collections efficiently store sequences of measurements over a period of time. The collection consists of time series data with the following information:

Data collected over time
Metadata that describes the measurement
Date of the measurement

Example	Measurement	Metadata
Sales Data	Revenue	Company
Infection Rates	Amount of People Infected	Location

Create a Time Series Collection

Important

Time series collections require MongoDB 5.0 or later.

To create a time series collection, pass the following parameters to the CreateCollection() method:

The name of the new collection to create
The TimeSeriesOptions object specifying at least the time field

Example

The following example creates the march2022 time series collection in the db database with the temperature as the time field:

db := client.Database("db")
// Creates a time series collection that stores "temperature" values over time
tso := options.TimeSeries().SetTimeField("temperature")
opts := options.CreateCollection().SetTimeSeriesOptions(tso)
db.CreateCollection(context.TODO(), "march2022", opts)

To check if you created the collection, send the "listCollections" command to the RunCommand() method:

package main
import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"os"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"go.mongodb.org/mongo-driver/mongo/options"
)
func main() {
	var uri string
	if uri = os.Getenv("MONGODB_URI"); uri == "" {
		log.Fatal("You must set your 'MONGODB_URI' environment variable. See\n\t https://www.mongodb.com/zh-cn/docs/drivers/go/current/usage-examples/")
	}
	client, err := mongo.Connect(options.Client().ApplyURI(uri))
	if err != nil {
		panic(err)
	}
	defer client.Disconnect(context.TODO())
	db := client.Database("myDB")
	// Creates a command to list collections
	command := bson.D{{"listCollections", 1}}
	var result bson.M
	// Runs the command on the database
	commandErr := db.RunCommand(context.TODO(), command).Decode(&result)
	if commandErr != nil {
		panic(commandErr)
	}
	// Prints the command results
	output, outputErr := json.MarshalIndent(result, "", "    ")
	if outputErr != nil {
		panic(outputErr)
	}
	fmt.Printf("%s\n", output)
}

{
   ...
   "cursor": {
        "firstBatch": [
            {
                "info": {
                    "readOnly": false
                },
                "name": "march2022",
                "options": {
                    "timeseries": {
                        ...
                    }
                },
                "type": "timeseries"
            },
    ...
 }

Query a Time Series Collection

To query a time series collection, use the same conventions as you would for retrieving and aggregating data.

Additional Information

To learn more about the operations mentioned, see the following guides:

API Documentation

To learn more about any of the methods or types discussed in this guide, see the following API Documentation:

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