import("context""fmt""cloud.google.com/go/bigquery""cloud.google.com/go/iam")// updateIAMPolicy demonstrates updating the ACL on a BigQuery table by adding a new entry to// an existing policy.funcupdateIAMPolicy(projectID,datasetID,tableIDstring)error{// projectID := "my-project-id"// datasetID := "mydataset"// tableID := "mytable"ctx:=context.Background()client,err:=bigquery.NewClient(ctx,projectID)iferr!=nil{returnfmt.Errorf("bigquery.NewClient: %w",err)}deferclient.Close()table:=client.Dataset(datasetID).Table(tableID)policy,err:=table.IAM().Policy(ctx)iferr!=nil{returnfmt.Errorf("failed to get table policy: %w",err)}newRole:=iam.RoleName("roles/bigquery.dataViewer")newMember:="allAuthenticatedUsers"policy.Add(newMember,newRole)iferr:=table.IAM().SetPolicy(ctx,policy);err!=nil{returnfmt.Errorf("failed to set new table policy: %w",err)}returnnil}

importcom.google.cloud.Identity;importcom.google.cloud.Policy;importcom.google.cloud.Role;importcom.google.cloud.bigquery.BigQuery;importcom.google.cloud.bigquery.BigQueryException;importcom.google.cloud.bigquery.BigQueryOptions;importcom.google.cloud.bigquery.TableId;importjava.util.HashMap;importjava.util.Map;importjava.util.Set;// Sample to update iam policy in tablepublicclassUpdateIamPolicy{publicstaticvoidmain(String[]args){// TODO(developer): Replace these variables before running the sample.StringdatasetName="MY_DATASET_NAME";StringtableName="MY_TABLE_NAME";updateIamPolicy(datasetName,tableName);}publicstaticvoidupdateIamPolicy(StringdatasetName,StringtableName){try{// Initialize client that will be used to send requests. This client only needs to be created// once, and can be reused for multiple requests.BigQuerybigquery=BigQueryOptions.getDefaultInstance().getService();TableIdtableId=TableId.of(datasetName,tableName);Policypolicy=bigquery.getIamPolicy(tableId);Map<Role,Set<Identity>>binding=newHashMap<>(policy.getBindings());binding.remove(Role.of("roles/bigquery.dataViewer"));policy.toBuilder().setBindings(binding).build();bigquery.setIamPolicy(tableId,policy);System.out.println("Iam policy updated successfully");}catch(BigQueryExceptione){System.out.println("Iam policy was not updated. \n"+e.toString());}}}