@google-cloud/spanner

Cloud Spanner: Node.js Client

Cloud Spanner is a fully managed, mission-critical, relational database service that offers transactional consistency at global scale, schemas, SQL (ANSI 2011 with extensions), and automatic, synchronous replication for high availability.

A comprehensive list of changes in each version may be found in the CHANGELOG.

• Cloud Spanner Node.js Client API Reference
• Cloud Spanner Documentation
• github.com/googleapis/nodejs-spanner

Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in Client Libraries Explained.

Table of contents:

• Quickstart
  • Before you begin
  • Installing the client library
  • Using the client library
• Samples
• Versioning
• Contributing
• License

Quickstart

Before you begin

• Select or create a Cloud Platform project.
• Enable billing for your project.
• Enable the Cloud Spanner API.
• Set up authentication so you can access the API from your local workstation.

Installing the client library

npm install @google-cloud/spanner

Using the client library

// Imports the Google Cloud client library
const {Spanner} = require('@google-cloud/spanner');

// Creates a client
const spanner = new Spanner({projectId});

// Gets a reference to a Cloud Spanner instance and database
const instance = spanner.instance(instanceId);
const database = instance.database(databaseId);

// The query to execute
const query = {
  sql: 'SELECT 1',
};

// Execute a simple SQL statement
const [rows] = await database.run(query);
console.log(`Query: ${rows.length} found.`);
rows.forEach(row => console.log(row));

Metrics

Cloud Spanner client supports client-side metrics that you can use along with server-side metrics to optimize performance and troubleshoot performance issues if they occur.

Client-side metrics are measured from the time a request leaves your application to the time your application receives the response. In contrast, server-side metrics are measured from the time Spanner receives a request until the last byte of data is sent to the client.

These metrics are enabled by default. You can opt out of using client-side metrics with the following code:

const spanner = new Spanner({
        disableBuiltInMetrics: true
});

You can also disable these metrics by setting SPANNER_DISABLE_BUILTIN_METRICS to true.

Note: Client-side metrics needs monitoring.timeSeries.create IAM permission to export metrics data. Ask your administrator to grant your service account the Monitoring Metric Writer (roles/monitoring.metricWriter) IAM role on the project.

Traces

Refer to the Observability README to know more about tracing support in the Cloud Spanner client.

Multiplexed Sessions

Spanner's Multiplexed Sessions can now be used as an efficient alternative to the default session pool. This feature helps reduce session management overhead and minimize session-related errors. Multiplexed sessions can be enabled for all transaction types via environment variables.

Configuration

To enable this feature, set the following environment variables to true:

• For Read-Only Transactions:

• GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS

• For Partitioned Operations:

• GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS
• GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS_PARTITIONED_OPS

• For Read-Write Transactions:

• GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS
• GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS_FOR_RW

For a detailed explanation of this feature, please refer to the official documentation.

Samples

Samples are in the samples/ directory. Each sample's README.md has instructions for running its sample.

Sample	Source Code	Try it
Add and drop new database role	source code
Backups-cancel	source code
Copies a source backup	source code
Copies a source backup	source code
Backups-create-with-encryption-key	source code
Backups-create-with-multiple-kms-keys	source code
Backups-create	source code
Backups-delete	source code
Backups-get-database-operations	source code
Backups-get-operations	source code
Backups-get	source code
Backups-restore-with-encryption-key	source code
Backups-restore-with-multiple-kms-keys	source code
Backups-restore	source code
Backups-update	source code
Backups	source code
Batch Write	source code
Batch	source code
Creates a full backup schedule	source code
Creates an incremental backup schedule	source code
Create-instance-without-default-backup-schedules	source code
CRUD	source code
Adds split points to a database.	source code
Creates a new database with a specific default leader	source code
Database-create-with-encryption-key	source code
Database-create-with-multiple-kms-keys	source code
Database-create-with-version-retention-period	source code
Gets the schema definition of an existing database	source code
Gets the default leader option of an existing database	source code
Updates the default leader of an existing database	source code
Updates a Cloud Spanner Database.	source code
Datatypes	source code
Deletes a backup schedule	source code
Runs an execute sql request with directed read options	source code
Delete using DML returning.	source code
Insert using DML returning.	source code
Update using DML returning.	source code
DML	source code
Enable fine grained access control	source code
Gets a backup schedule	source code
Get-commit-stats	source code
List database roles	source code
Gets the instance config metadata for the configuration nam6	source code
Creates a new value-storing index	source code
Creates a new index	source code
Executes a read-only SQL query using an existing index.	source code
Reads data using an existing storing index.	source code
Read data using an existing index.	source code
Indexing	source code
Creates a user-managed instance configuration.	source code
Deletes a user-managed instance configuration.	source code
Lists the instance configuration operations.	source code
Updates a user-managed instance configuration.	source code
Creates a new instance partition	source code
Updates an instance.	source code
Creates a instance with asymmetric autoscaling config.	source code
Creates a instance with autoscaling config.	source code
Instance-with-processing-units	source code
Instance	source code
Json-add-column	source code
Json-query-parameter	source code
Json-update-data	source code
Lists backup schedules of a database	source code
Lists all databases on the selected instance	source code
Lists all the available instance configs for the selected project.	source code
Executes request with max commit delay	source code
Numeric-add-column	source code
Numeric-query-parameter	source code
Numeric-update-data	source code
Observability (Tracing) with OpenTelemetry using OTLP	source code
Observability (Tracing) with OpenTelemetry	source code
Adds a column to an existing table in a Spanner PostgreSQL database.	source code
Showcase the rules for case-sensitivity and case folding for a Spanner PostgreSQL database.	source code
Creates a PostgreSQL Database.	source code
Use cast operator to cast from one data type to another in a Spanner PostgreSQL database.	source code
Execute a batch of DML statements on a Spanner PostgreSQL database.	source code
Updates data in a table in a Spanner PostgreSQL database.	source code
Execute a Partitioned DML on a Spanner PostgreSQL database.	source code
Delete using DML returning on a Spanner PostgreSQL database.	source code
Insert using DML returning on a Spanner PostgreSQL database.	source code
Update using DML returning on a Spanner PostgreSQL database.	source code
Execute a DML statement with parameters on a Spanner PostgreSQL database.	source code
Calls a server side function on a Spanner PostgreSQL database.	source code
Creates a new storing index in a Spanner PostgreSQL database.	source code
Created interleaved table hierarchy using PostgreSQL dialect.	source code
Showcase how add a jsonb column in a PostgreSQL table.	source code
Showcase how query data to a jsonb column in a PostgreSQL table.	source code
Showcase how update data to a jsonb column in a PostgreSQL table.	source code
Showcase how to work with the PostgreSQL NUMERIC/DECIMAL data type on a Spanner PostgreSQL database.	source code
Showcases how a Spanner PostgreSQL database orders null values in a query.	source code
Execute a query with parameters on a Spanner PostgreSQL database.	source code
Query the information schema metadata in a Spanner PostgreSQL database.	source code
Alters a sequence in a PostgreSQL database.	source code
Creates sequence in PostgreSQL database.	source code
Drops a sequence in PostgreSQL database.	source code
Proto-query-data	source code
Creates a new database with a proto column and enum	source code
Proto-update-data-dml	source code
Proto-update-data	source code
Queryoptions	source code
Quickstart	source code
Read data with database role	source code
Performs a read-write transaction with isolation level option	source code
Sets a request tag for a single query	source code
Run Batch update with RPC priority	source code
Run partitioned update with RPC priority	source code
Create partitions with RPC priority	source code
Read data with RPC Priority	source code
Query data with RPC Priority	source code
Run transaction with RPC priority	source code
Schema	source code
Alters a sequence in a GoogleSQL database.	source code
Creates sequence in GoogleSQL database.	source code
Drops a sequence in GoogleSQL database.	source code
Executes a read/write transaction with statement timeout	source code
Struct	source code
Alters a table with foreign key delete cascade action	source code
Creates a table with foreign key delete cascade action	source code
Drops a foreign key constraint with delete cascade action	source code
Timestamp	source code
Executes a read/write transaction with transaction and request tags	source code
Executes a read/write transaction with transaction timeout	source code
Transaction	source code
Updates a backup schedule	source code
Updates an instance.	source code

The Cloud Spanner Node.js Client API Reference documentation also contains samples.

Supported Node.js Versions

Our client libraries follow the Node.js release schedule. Libraries are compatible with all current active and maintenance versions of Node.js. If you are using an end-of-life version of Node.js, we recommend that you update as soon as possible to an actively supported LTS version.

Google's client libraries support legacy versions of Node.js runtimes on a best-efforts basis with the following warnings:

• Legacy versions are not tested in continuous integration.
• Some security patches and features cannot be backported.
• Dependencies cannot be kept up-to-date.

Client libraries targeting some end-of-life versions of Node.js are available, and can be installed through npm dist-tags. The dist-tags follow the naming convention legacy-(version). For example, npm install @google-cloud/spanner@legacy-8 installs client libraries for versions compatible with Node.js 8.

Versioning

This library follows Semantic Versioning.

This library is considered to be stable. The code surface will not change in backwards-incompatible ways unless absolutely necessary (e.g. because of critical security issues) or with an extensive deprecation period. Issues and requests against stable libraries are addressed with the highest priority.

More Information: Google Cloud Platform Launch Stages

Contributing

Contributions welcome! See the Contributing Guide.

Please note that this README.md, the samples/README.md, and a variety of configuration files in this repository (including .nycrc and tsconfig.json) are generated from a central template. To edit one of these files, make an edit to its templates in directory.

License

Apache Version 2.0

See LICENSE