Updated on 2026-10-27 GMT+08:00

Querying a Flow Instance

Function

This API is used to query an instance of a flow.

Calling Method

For details, see Calling APIs.

Authorization Information

Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions. For details about the required permissions, see Permissions Policies and Supported Actions.

URI

GET /v2/{project_id}/fgs/workflows/{workflow_id}/executions/{execution_id}

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Definition

Project ID. For details, see Obtaining a Project ID.

Constraints

N/A.

Range

The value contains 32 characters. Only letters and digits are allowed.

Default Value

N/A.

workflow_id

Yes

String

Definition

Flow ID.

Constraints

N/A.

Range

1 to 512 characters

Default Value

N/A.

execution_id

Yes

String

Flow instance ID.

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Get-Workflow-Full-History-Data

No

Boolean

Whether to obtain the complete flow execution output.

Response Parameters

Status code: 200

Table 3 Response body parameters

Parameter

Type

Description

workflow_id

String

Flow ID.

workflow_urn

String

Definition

Flow URN. The format is as follows:

urn:fss:<region_id>:<project_id>:workflow:<package>:<workflow_name>:<version>

Notes:

Currently, only default is supported for package.

Currently, only latest is supported for version.

Range

N/A.

execution_id

String

Flow instance ID.

status

String

Definition

Process instance status.

Range

  • success: successful

  • fail: failed

  • running: running

  • timeout: timeout

  • cancel: canceled

headers

Object

Headers for function execution.

input

Object

Input parameters for function execution.

output

Object

Function execution result.

begin_time

String

Flow instance creation time (UTC), in the format yyyy-MM-ddTHH:mm:ssZ.

end_time

String

Flow instance end time (UTC), in the format yyyy-MM-ddTHH:mm:ssZ.

last_update_time

String

Flow instance last update time (UTC), in the format yyyy-MM-ddTHH:mm:ssZ.

created_by

String

Flow instance creator.

node_execution_details

Array of NodeExecutionDetail objects

Node execution information.

Table 4 NodeExecutionDetail

Parameter

Type

Description

node_id

String

Flow node ID.

node_name

String

Flow node name.

execution_id

String

Flow node execution record ID.

executions

Array of NodeExecution objects

Node execution records.

Table 5 NodeExecution

Parameter

Type

Description

status

String

Definition

Process instance status.

Range

  • success: successful

  • fail: failed

  • running: running

  • timeout: timeout

  • cancel: canceled

input

Object

Input parameters for function execution.

output

Object

Function execution result.

begin_time

Long

Node start time (UTC), precise to milliseconds.

end_time

Long

Node end time (UTC), precise to milliseconds.

error_message

Object

Error message. This parameter has a value only when the node execution fails.

request_id

String

Flow node request ID.

Status code: 400

Table 6 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error description.

request_id

String

Request ID.

Status code: 404

Table 7 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error description.

Status code: 500

Table 8 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error description.

request_id

String

Request ID.

Example Requests

Query details about instance {execution_id} of function flow {workflow_id}.

GET /v2/{project_id}/fgs/workflows/{workflow_id}/executions/{execution_id}

Example Responses

Status code: 200

{
  "workflow_id" : "48aff955-ea10-4ffd-b426-190bc192dc14",
  "workflow_urn" : "urn:fss:cn-north-7:73d69ae0cfcf460190522d060f05ad:workflow:default:testflow:latest",
  "execution_id" : "48aff955-ea10-4ffd-b426-190bc192dc14",
  "status" : "running",
  "headers" : {
    "tenantId" : "user1"
  },
  "input" : {
    "arg1" : "argument_1",
    "arg2" : "argument_2"
  },
  "output" : {
    "arg1" : "argument_1",
    "arg2" : "argument_2"
  },
  "begin_time" : "2021-01-01T00:00:00Z",
  "end_time" : "2021-01-01T00:00:00Z",
  "last_update_time" : "2021-01-01T00:00:00Z",
  "created_by" : "admin",
  "node_execution_details" : [ {
    "node_id" : "48aff955-ea10-4ffd-b426-190bc192dc14",
    "node_name" : "string",
    "execution_id" : "string",
    "executions" : [ {
      "status" : "running",
      "input" : {
        "arg1" : "argument_1",
        "arg2" : "argument_2"
      },
      "output" : {
        "arg1" : "argument_1",
        "arg2" : "argument_2"
      },
      "begin_time" : 1605119892050,
      "end_time" : 1605119892050,
      "error_message" : {
        "detail" : "Execution failed"
      },
      "request_id" : "string"
    } ]
  } ]
}

SDK Sample Code

The SDK sample code is as follows.

Java

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package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.functiongraph.v2.region.FunctionGraphRegion;
import com.huaweicloud.sdk.functiongraph.v2.*;
import com.huaweicloud.sdk.functiongraph.v2.model.*;


public class ShowWorkflowExecutionSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        String projectId = "{project_id}";

        ICredential auth = new BasicCredentials()
                .withProjectId(projectId)
                .withAk(ak)
                .withSk(sk);

        FunctionGraphClient client = FunctionGraphClient.newBuilder()
                .withCredential(auth)
                .withRegion(FunctionGraphRegion.valueOf("<YOUR REGION>"))
                .build();
        ShowWorkflowExecutionRequest request = new ShowWorkflowExecutionRequest();
        request.withWorkflowId("{workflow_id}");
        request.withExecutionId("{execution_id}");
        try {
            ShowWorkflowExecutionResponse response = client.showWorkflowExecution(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

Python

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# coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkfunctiongraph.v2.region.functiongraph_region import FunctionGraphRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkfunctiongraph.v2 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    projectId = "{project_id}"

    credentials = BasicCredentials(ak, sk, projectId)

    client = FunctionGraphClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(FunctionGraphRegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = ShowWorkflowExecutionRequest()
        request.workflow_id = "{workflow_id}"
        request.execution_id = "{execution_id}"
        response = client.show_workflow_execution(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

Go

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package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    functiongraph "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/functiongraph/v2"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/functiongraph/v2/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/functiongraph/v2/region"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    projectId := "{project_id}"

    auth, err := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithProjectId(projectId).
        SafeBuild()

    if err != nil {
        fmt.Println(err)
        return
    }

    hcClient, err := functiongraph.FunctionGraphClientBuilder().
         WithRegion(region.ValueOf("<YOUR REGION>")).
         WithCredential(auth).
         SafeBuild()


    if err != nil {
        fmt.Println(err)
        return
    }

    client := functiongraph.NewFunctionGraphClient(hcClient)

    request := &model.ShowWorkflowExecutionRequest{}
	request.WorkflowId = "{workflow_id}"
	request.ExecutionId = "{execution_id}"
	response, err := client.ShowWorkflowExecution(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

More

For SDK sample code of more programming languages, see the Sample Code tab in API Explorer. SDK sample code can be automatically generated.

Status Codes

Status Code

Description

200

OK

400

Bad Request

404

Bad Request

500

Internal Server Error

Error Codes

See Error Codes.