Executing DSL Algorithms

Function

This API is used to provide flexible and controllable DSLs to help users design and run algorithms at low costs. For details about the DSL algorithm, see the syntax introduction in DSL Syntax.

URI

URI format

POST /ges/v1.0/{project_id}/graphs/{graph_name}/action?action_id=algorithm-query

Parameter description

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID, which is used for resource isolation. For details about how to obtain the value, see Obtaining a Project ID.
graph_name	Yes	String	Graph name

Request Parameters

**Table 2** Body parameter
Parameter	Mandatory	Type	Description
commands	Yes	String	Command executed by the custom operation. For details about the syntax, see the syntax introduction.

Response Parameters

**Table 3** Response parameters
Parameter	Type	Description
errorMessage	String	System prompt. If execution succeeds, this parameter may be left blank. If execution fails, this parameter is used to display the error message.
errorCode	String	System prompt. If execution succeeds, this parameter may be left blank. If execution fails, this parameter is used to display the error code.
data	Object	Query results. This parameter is left blank when the query fails.

Example Request

POST/ges/v1.0/{project_id}/graphs/{graph_name}/action?action_id=algorithm-query
 {
     "commands":"Match<Vertex> v(['1']); v.repeat(bothV()).limit(2); return v;"
 }

Example Response

Example response for a successful request

Status code: 200

{
     "data":{
         "vertices":[
             {
                 "id":"1",
                 "label":"movie",
                 "properties":{
                     "genres":[
                         "Comedy"
                     ],
                     "movieid":[
                         1
                     ],
                     "title":[
                         "Airplane! (1980)"
                     ]
                 }
             }
         ],
         "runtime":0.126476598
     }
 }

Example response for a failed request

{  
     "errorCode":"GES.8814",
     "errorMessage":"Unsupported API."
 }

Status Codes

Normal
200

Abnormal

**Table 4** Return code for failed requests
Return Value	Description
400 Bad Request	Request error.
401 Unauthorized	Authorization failed.
403 Forbidden	No operation permissions.
404 Not Found	No resources found.
500 Internal Server Error	Internal server error.
503 Service Unavailable	Service unavailable.