opensearch-docs-cn/_opensearch/rest-api/document-apis/get-documents.md

layout	title	parent	nav_order
default	Get document	Document APIs	5

Get document

After adding a JSON document to your index, you can use the get document API operation to retrieve the document's information and data.

Example

GET sample-index1/_doc/1

Path and HTTP methods

GET <index>/_doc/<_id>
HEAD <index>/_doc/<_id>

GET <index>/_source/<_id>
HEAD <index>/_source/<_id>

URL parameters

All get document URL parameters are optional.

Parameter	Type	Description
preference	String	Specifies a preference of which shard to retrieve results from. Available options are _local, which tells the operation to retrieve results from a locally allocated shard replica, and a custom string value assigned to a specific shard replica. By default, OpenSearch executes get document operations on random shards.
realtime	Boolean	Specifies whether the operation should run in realtime. If false, the operation waits for the index to refresh to analyze the source to retrieve data, which makes the operation near-realtime. Default is true.
refresh	Boolean	If true, OpenSearch refreshes shards to make the operation visible to searching. Default is false.
routing	String	A value used to route the operation to a specific shard.
stored_fields	Boolean	If true, the operation retrieves document fields stored in the index rather than the document's _source. Default is false.
_source	String	Whether to include the _source field in the response body. Default is true.
_source_excludes	String	A comma-separated list of source fields to exclude in the query response.
_source_includes	String	A comma-separated list of source fields to include in the query response.
version	Integer	The version of the document to return, which must match the current version of the document.
version_type	Enum	Retrieves a specifically typed document. Available options are external (retrieve the document if the specified version number is greater than the document's current version) and external_gte (retrieve the document if the specified version number is greater than or equal to the document's current version). For example, to retrieve version 3 of a document, use /_doc/1?version=3&version_type=external.

Response

{
  "_index": "sample-index1",
  "_type": "_doc",
  "_id": "1",
  "_version": 1,
  "_seq_no": 0,
  "_primary_term": 9,
  "found": true,
  "_source": {
    "text": "This is just some sample text."
  }
}

Response body fields

Field	Description
_index	The name of the index.
_type	The document's type. OpenSearch only supports one type, which is _doc.
_id	The document's ID.
_version	The document's version number. Updated whenever the document changes.
_seq_no	The sequnce number assigned when the document is indexed.
primary_term	The primary term assigned when the document is indexed.
found	Whether the document exists.
_routing	The shard that the document is routed to. If the document is not routed to a particular shard, this field is omitted.
_source	Contains the document's data if found is true. If _source is set to false or stored_fields is set to true in the URL parameters, this field is omitted.
_fields	Contains the document's data that's stored in the index. Only returned if both stored_fields and found are true.