trino-js-client

A Trino client for Node.js.

Join us on Trino Slack in #core-dev to discuss and help this project.

Features

• Connections over HTTP or HTTPS
• Supports HTTP Basic Authentication
• Per-query user information for access control

Requirements

• Node 12 or newer.
• Trino 0.16x or newer.

Install

npm install trino-client or yarn add trino-client

Usage

For additional info on all available methods and types have a look at the API documentation.

Create a Trino client

const trino: Trino = Trino.create({
  server: 'http://localhost:8080',
  catalog: 'tpcds',
  schema: 'sf100000',
  auth: new BasicAuth('test'),
});

Submit a query

const iter: Iterator<QueryResult> = await trino.query(
  'select * from customer limit 100'
);

Iterate through the query results

for await (const queryResult of iter) {
  console.log(queryResult.data);
}

Alternative: map and aggregate the data

const data: QueryData[] = await iter
  .map(r => r.data ?? [])
  .fold<QueryData[]>([], (row, acc) => [...acc, ...row]);

Examples

More usage examples can be found in the integration tests.

Build

Use the following commands to build the project locally with your modifications, and in preparation to contribute a pull request.

Requirements:

• yarn

Install dependencies:

yarn install --frozen-lockfile

Lint the source code:

yarn test:lint

Build:

yarn build

A successful build run does not produce any message on the terminal.

Integration test

Integration tests run against a Trino server running on your workstation.

Requirements:

• kind
• kubectl

Create a cluster:

kind create cluster

Deploy Trino:

kubectl apply -f tests/it/trino.yml

Wait for pods to be ready:

kubectl wait --for=condition=ready pods -n trino-system --all --timeout=120s

Ensure Trino is running and available on port 8080. Run the following command in a separate terminal:

kubectl -n trino-system port-forward svc/trino 8080:8080

Run tests:

yarn test:it --testTimeout=60000

Output should look similar to the following:

 PASS  tests/it/client.spec.ts
  trino
    ✓ exhaust query results (1567 ms)
    ✓ close running query (200 ms)
    ✓ cancel running query (17 ms)
    ✓ get query info (1 ms)
    ✓ client extra header propagation
    ✓ query request header propagation (88 ms)
    ✓ QueryResult has error info
    ✓ QueryInfo has failure info (1 ms)
    ✓ prepare statement (98 ms)
    ✓ multiple prepare statement (432 ms)

Test Suites: 1 passed, 1 total
Tests:       10 passed, 10 total
Snapshots:   0 total
Time:        3.457 s
Ran all test suites matching /tests\/it/i.

Remove the cluster:

kind delete cluster

Contributing

Follow the Trino contribution guidelines and contact us on Slack and GitHub.

Copyright Trino JS Client contributors 2022-present

Releasing

Releases are automated with GitHub Actions and only require a pull request that updates the version in package.json. For example, see PR 723