# QueryGraph
<a name="API_QueryGraph"></a>

Queries entities in the graph store.

## Request Syntax
<a name="API_QueryGraph_RequestSyntax"></a>

```
POST /v2/domains/domainIdentifier/graph/query?maxResults=maxResults&nextToken=nextToken HTTP/1.1
Content-type: application/json

{
   "additionalAttributes": { 
      "formNames": [ "string" ]
   },
   "match": [ 
      { ... }
   ]
}
```

## URI Request Parameters
<a name="API_QueryGraph_RequestParameters"></a>

The request uses the following URI parameters.

 ** [domainIdentifier](#API_QueryGraph_RequestSyntax) **   <a name="datazone-QueryGraph-request-uri-domainIdentifier"></a>
The identifier of the Amazon DataZone domain.  
Pattern: `dzd[-_][a-zA-Z0-9_-]{1,36}`   
Required: Yes

 ** [maxResults](#API_QueryGraph_RequestSyntax) **   <a name="datazone-QueryGraph-request-uri-maxResults"></a>
The maximum number of entities to return in a single call to `QueryGraph`. When the number of entities to be listed is greater than the value of `MaxResults`, the response contains a `NextToken` value that you can use in a subsequent call to `QueryGraph` to list the next set of entities.  
Valid Range: Minimum value of 1. Maximum value of 50.

 ** [nextToken](#API_QueryGraph_RequestSyntax) **   <a name="datazone-QueryGraph-request-uri-nextToken"></a>
When the number of entities is greater than the default value for the `MaxResults` parameter, or if you explicitly specify a value for `MaxResults` that is less than the number of entities, the response includes a pagination token named `NextToken`. You can specify this `NextToken` value in a subsequent call to `QueryGraph` to list the next set of entities.  
Length Constraints: Minimum length of 1. Maximum length of 8192.

## Request Body
<a name="API_QueryGraph_RequestBody"></a>

The request accepts the following data in JSON format.

 ** [additionalAttributes](#API_QueryGraph_RequestSyntax) **   <a name="datazone-QueryGraph-request-additionalAttributes"></a>
Additional details on the queried entity that can be requested in the response.  
Type: [AdditionalAttributes](API_AdditionalAttributes.md) object  
Required: No

 ** [match](#API_QueryGraph_RequestSyntax) **   <a name="datazone-QueryGraph-request-match"></a>
List of query match clauses.  
Type: Array of [MatchClause](API_MatchClause.md) objects  
Array Members: Fixed number of 2 items.  
Required: Yes

## Response Syntax
<a name="API_QueryGraph_ResponseSyntax"></a>

```
HTTP/1.1 200
Content-type: application/json

{
   "items": [ 
      { ... }
   ],
   "nextToken": "string"
}
```

## Response Elements
<a name="API_QueryGraph_ResponseElements"></a>

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

 ** [items](#API_QueryGraph_ResponseSyntax) **   <a name="datazone-QueryGraph-response-items"></a>
The results of the `QueryGraph` action.  
Type: Array of [ResultItem](API_ResultItem.md) objects

 ** [nextToken](#API_QueryGraph_ResponseSyntax) **   <a name="datazone-QueryGraph-response-nextToken"></a>
When the number of entities is greater than the default value for the `MaxResults` parameter, or if you explicitly specify a value for `MaxResults` that is less than the number of entities, the response includes a pagination token named `NextToken`. You can specify this `NextToken` value in a subsequent call to `QueryGraph` to list the next set of entities.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 8192.

## Errors
<a name="API_QueryGraph_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** AccessDeniedException **   
You do not have sufficient access to perform this action.  
HTTP Status Code: 403

 ** InternalServerException **   
The request has failed because of an unknown error, exception or failure.  
HTTP Status Code: 500

 ** ThrottlingException **   
The request was denied due to request throttling.  
HTTP Status Code: 429

 ** UnauthorizedException **   
You do not have permission to perform this action.  
HTTP Status Code: 401

 ** ValidationException **   
The input fails to satisfy the constraints specified by the AWS service.  
HTTP Status Code: 400

## See Also
<a name="API_QueryGraph_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/datazone-2018-05-10/QueryGraph) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/datazone-2018-05-10/QueryGraph)