Awesome

Development

Learn about development for all Trino organization projects:

• Vision
• Contribution process
• Pull request and commit guidelines
• Release note guidelines

Further information in the development section of the website includes different roles, like contributors, reviewers, and maintainers, related processes, and other aspects.

See the Trino developer guide for information about the SPI, implementing connectors and other plugins plugins, the client protocol, writing tests and other lower level details.

See DEVELOPMENT for information about code style, development process, and guidelines.

See CONTRIBUTING for contribution requirements.

Security

See the project security policy for information about reporting vulnerabilities.

Trino supports reproducible builds as of version 449.

Build requirements

• Mac OS X or Linux
• Java 23.0.0+, 64-bit
• Docker
  • Turn SELinux or other systems disabling write access to the local checkout off, to allow containers to mount parts of the Trino source tree

Building Trino

Trino is a standard Maven project. Simply run the following command from the project root directory:

./mvnw clean install -DskipTests

On the first build, Maven downloads all the dependencies from the internet and caches them in the local repository (~/.m2/repository), which can take a while, depending on your connection speed. Subsequent builds are faster.

Trino has a comprehensive set of tests that take a considerable amount of time to run, and are thus disabled by the above command. These tests are run by the CI system when you submit a pull request. We recommend only running tests locally for the areas of code that you change.

Running Trino in your IDE

Overview

After building Trino for the first time, you can load the project into your IDE and run the server. We recommend using IntelliJ IDEA. Because Trino is a standard Maven project, you easily can import it into your IDE. In IntelliJ, choose Open Project from the Quick Start box or choose Open from the File menu and select the root pom.xml file.

After opening the project in IntelliJ, double check that the Java SDK is properly configured for the project:

• Open the File menu and select Project Structure
• In the SDKs section, ensure that JDK 23 is selected (create one if none exist)
• In the Project section, ensure the Project language level is set to 23

Running a testing server

The simplest way to run Trino for development is to run the TpchQueryRunner class. It will start a development version of the server that is configured with the TPCH connector. You can then use the CLI to execute queries against this server. Many other connectors have their own *QueryRunner class that you can use when working on a specific connector.

Running the full server

Trino comes with sample configuration that should work out-of-the-box for development. Use the following options to create a run configuration:

• Main Class: io.trino.server.DevelopmentServer
• VM Options: -ea -Dconfig=etc/config.properties -Dlog.levels-file=etc/log.properties -Djdk.attach.allowAttachSelf=true
• Working directory: $MODULE_DIR$
• Use classpath of module: trino-server-dev

The working directory should be the trino-server-dev subdirectory. In IntelliJ, using $MODULE_DIR$ accomplishes this automatically.

If VM options doesn't exist in the dialog, you need to select Modify options and enable Add VM options.

To adjust which plugins are enabled for the development server, adjust the value of plugin.bundles in config.properties. Each entry in this list must represent a plugin specified by one of the following options:

• A path to a pom.xml or *.pom file describing a Maven project that produces a plugin.
• Maven coordinates, in the form <groupId>:<artifactId>[:<extension>[:<classifier>]]:<version>. The plugin will be loaded via Maven and therefore must be available in your local repository or a remote repository.
• A path to a plugin directory containing JAR files. See Deploying a custom plugin for more details.

If you want to use a plugin in a catalog, you must add a corresponding <catalog_name>.properties file to testing/trino-server-dev/etc/catalog.

Running the CLI

Start the CLI to connect to the server and run SQL queries:

client/trino-cli/target/trino-cli-*-executable.jar

Run a query to see the nodes in the cluster:

SELECT * FROM system.runtime.nodes;

Run a query against the TPCH connector:

SELECT * FROM tpch.tiny.region;