To get the status of the long-running database operation:
For name, enter the long-running database operation name as shown in the response to projects.instances.databases.create or projects.instances.databases.updateDdl. For example:
(Use the operation name you received instead of this value.) You can also retrieve the database operation name by listing long-running database operations.
Click Execute and view the response. When an operation is done, the done field will be set to true.
To poll a long-running database operation, repeatedly invoke the projects.instances.databases.operations.get method until the operation is done. Use a backoff between each poll request. For example, poll every 10 seconds.