Method: projects.locations.workflows.start

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


The URL uses gRPC Transcoding syntax.

Path parameters



Required. The unique identifier for the migration workflow. Example: projects/123/locations/us/workflows/1234

Request body

The request body must be empty.

Response body

If successful, the response body is empty.

Authorization scopes

Requires the following OAuth scope:


For more information, see the Authentication Overview.

IAM Permissions

Requires the following IAM permission on the name resource:

  • bigquerymigration.workflows.update

For more information, see the IAM documentation.