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database-get-ddl.js
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58 lines (51 loc) · 1.88 KB
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/**
* Copyright 2021 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: Gets the schema definition of an existing database
// usage: node database-get-ddl.js <INSTANCE_ID> <DATABASE_ID> <PROJECT_ID>
'use strict';
function main(instanceId, databaseId, projectId) {
// [START spanner_get_database_ddl]
/**
* TODO(developer): Uncomment the following lines before running the sample.
*/
// const projectId = 'my-project-id';
// const instanceId = 'my-instance-id';
// const databaseId = 'my-database-id';
// Imports the Google Cloud client library
const {Spanner} = require('@google-cloud/spanner');
// Creates a client
const spanner = new Spanner({
projectId: projectId,
});
// Gets a reference to a Cloud Spanner instance and a database.
const instance = spanner.instance(instanceId);
const database = instance.database(databaseId);
async function getDatabaseDdl() {
// Get the schema definition of the database.
const [ddlStatements] = await database.getSchema();
console.log(`Retrieved database DDL for ${database.formattedName_}:`);
ddlStatements.forEach(statement => {
console.log(`${statement};\n`);
});
}
getDatabaseDdl();
// [END spanner_get_database_ddl]
}
process.on('unhandledRejection', err => {
console.error(err.message);
process.exitCode = 1;
});
main(...process.argv.slice(2));