REQUIRED: The Cloud Spanner resource for which the policy is being set. The format isprojects/<project ID>/instances/<instance ID>for instance resources andprojects/<project ID>/instances/<instance ID>/databases/<database ID>for databases resources.
Request body
The request body contains data with the following structure:
REQUIRED: The complete policy to be applied to theresource. The size of the policy is limited to a few 10s of KB. An empty policy is a valid policy but certain Google Cloud services (such as Projects) might reject them.
Response body
If successful, the response body contains an instance ofPolicy.
[[["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 2025-06-18 UTC."],[],[],null,["# Method: projects.instances.backups.setIamPolicy\n\n- [HTTP request](#body.HTTP_TEMPLATE)\n- [Path parameters](#body.PATH_PARAMETERS)\n- [Request body](#body.request_body)\n - [JSON representation](#body.request_body.SCHEMA_REPRESENTATION)\n- [Response body](#body.response_body)\n- [Authorization scopes](#body.aspect)\n- [Try it!](#try-it)\n\nSets the access control policy on a database or backup resource. Replaces any existing policy.\n\nAuthorization requires `spanner.databases.setIamPolicy` permission on [resource](/spanner/docs/reference/rest/v1/projects.instances/setIamPolicy#body.PATH_PARAMETERS.resource). For backups, authorization requires `spanner.backups.setIamPolicy` permission on [resource](/spanner/docs/reference/rest/v1/projects.instances/setIamPolicy#body.PATH_PARAMETERS.resource). For backup schedules, authorization requires `spanner.backupSchedules.setIamPolicy` permission on [resource](/spanner/docs/reference/rest/v1/projects.instances/setIamPolicy#body.PATH_PARAMETERS.resource).\n\n### HTTP request\n\nChoose a location: \nglobal europe-west8 me-central2 us-central1 us-central2 us-east1 us-east4 us-east5 us-south1 us-west1 us-west2 us-west3 us-west4 us-west8 us-east7 \n\n\u003cbr /\u003e\n\nThe URLs use [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n### Request body\n\nThe request body contains data with the following structure:\n\n### Response body\n\nIf successful, the response body contains an instance of [Policy](/spanner/docs/reference/rest/v1/Policy).\n\n### Authorization scopes\n\nRequires one of the following OAuth scopes:\n\n- `https://www.googleapis.com/auth/spanner.admin`\n- `https://www.googleapis.com/auth/cloud-platform`\n\nFor more information, see the [Authentication Overview](/docs/authentication#authorization-gcp)."]]
