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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// sample-metadata:
// title: Read data with database role
// usage: node read-data-with-database-role.js <INSTANCE_ID> <DATABASE_ID> <PROJECT_ID>
'use strict';
function main(
instanceId = 'my-instance',
databaseId = 'my-database',
projectId = 'my-project-id',
) {
// [START spanner_read_data_with_database_role]
/**
* TODO(developer): Uncomment these variables before running the sample.
*/
// const instanceId = 'my-instance';
// const databaseId = 'my-database';
// const projectId = 'my-project-id';
// Imports the Google Cloud Spanner client library
const {Spanner} = require('@google-cloud/spanner');
// Instantiates a client
const spanner = new Spanner({
projectId: projectId,
});
async function readDataWithDatabaseRole() {
// Gets a reference to a Cloud Spanner instance and database.
const instance = spanner.instance(instanceId);
// Connect to a database using the 'parent' database role. This means that the connection will only have the permissions that have explicitly been granted to the 'parent' role.
const options = {
databaseRole: 'parent',
};
const database = instance.database(databaseId, options);
try {
const query = {
sql: 'SELECT SingerId, FirstName, LastName FROM Singers',
};
const [rows] = await database.run(query);
for (const row of rows) {
const json = row.toJSON();
console.log(
`SingerId: ${json.SingerId}, FirstName: ${json.FirstName}, LastName: ${json.LastName}`,
);
}
} catch (err) {
console.error('ERROR:', err);
} finally {
// Close the database when finished.
await database.close();
}
}
readDataWithDatabaseRole();
// [END spanner_read_data_with_database_role]
}
process.on('unhandledRejection', err => {
console.error(err.message);
process.exitCode = 1;
});
main(...process.argv.slice(2));