Starts a previously created migration workflow. I.e., the state transitions from DRAFT to RUNNING. This is a no-op if the state is already RUNNING. An error will be signaled if the state is anything other than DRAFT or RUNNING.
HTTP request
POST https://bigquerymigration.googleapis.com/v2alpha/{name=projects/*/locations/*/workflows/*}:start
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-07-02 UTC."],[[["\u003cp\u003eThis webpage details how to start a migration workflow, transitioning its state from DRAFT to RUNNING using a \u003ccode\u003ePOST\u003c/code\u003e request.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePOST\u003c/code\u003e request must be sent to the specified URL, using the required unique identifier for the migration workflow in the \u003ccode\u003ename\u003c/code\u003e path parameter.\u003c/p\u003e\n"],["\u003cp\u003eThe request body for initiating a workflow must be empty, and a successful operation will result in an empty JSON object response.\u003c/p\u003e\n"],["\u003cp\u003eAuthorization for this operation requires the OAuth scope \u003ccode\u003ehttps://www.googleapis.com/auth/cloud-platform\u003c/code\u003e and the IAM permission \u003ccode\u003ebigquerymigration.workflows.update\u003c/code\u003e on the specified resource.\u003c/p\u003e\n"]]],[],null,["# Method: projects.locations.workflows.start\n\n- [HTTP request](#body.HTTP_TEMPLATE)\n- [Path parameters](#body.PATH_PARAMETERS)\n- [Request body](#body.request_body)\n- [Response body](#body.response_body)\n- [Authorization scopes](#body.aspect)\n- [IAM Permissions](#body.aspect_1)\n- [Try it!](#try-it)\n\nStarts a previously created migration workflow. I.e., the state transitions from DRAFT to RUNNING. This is a no-op if the state is already RUNNING. An error will be signaled if the state is anything other than DRAFT or RUNNING.\n\n### HTTP request\n\n`POST https://bigquerymigration.googleapis.com/v2alpha/{name=projects/*/locations/*/workflows/*}:start`\n\nThe URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n### Request body\n\nThe request body must be empty.\n\n### Response body\n\nIf successful, the response body is an empty JSON object.\n\n### Authorization scopes\n\nRequires the following OAuth scope:\n\n- `https://www.googleapis.com/auth/cloud-platform`\n\nFor more information, see the [Authentication Overview](/docs/authentication#authorization-gcp).\n\n### IAM Permissions\n\nRequires the following [IAM](https://cloud.google.com/iam/docs) permission on the `name` resource:\n\n- `bigquerymigration.workflows.update`\n\nFor more information, see the [IAM documentation](https://cloud.google.com/iam/docs)."]]
