This API is used to query the offset of the earliest message in a partition.

GET /v2/{project_id}/instances/{instance_id}/management/topics/{topic}/partitions/{partition}/beginning-message

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID.
instance_id	Yes	String	Instance ID.
topic	Yes	String	Topic name. A topic name must start with a letter and can only contain letters, hyphens (-), underscores (_), and digits.
partition	Yes	Integer	Partition number.

None

Status code: 200

**Table 2** Response body parameters
Parameter	Type	Description
topic	String	Topic name.
partition	Integer	Partition number.
offset	Integer	Offset of the latest message.
timestamp	Long	Time when a message is created. The value is a Unix timestamp. The unit is millisecond.

GET https://{endpoint}/v2/{project_id}/instances/{instance_id}/management/topics/{topic}/partitions/{partition}/beginning-message

Status code: 200

The offset of the earliest message in a partition is queried successfully.

{
  "topic" : "mytest",
  "partition" : 0,
  "offset" : 9,
  "timestamp" : 1568125039164
}

Status Code	Description
200	The offset of the earliest message in a partition is queried successfully.

Querying Offset of the Earliest Message in a Partition