Presto is a distributed SQL query engine for big data.
See the User Manual for deployment instructions and end user documentation.
- Mac OS X or Linux
- Java 8 Update 151 or higher (8u151+), 64-bit. Both Oracle JDK and OpenJDK are supported.
- Maven 3.3.9+ (for building)
- Python 2.4+ (for running with the launcher script)
Presto is a standard Maven project. Simply run the following command from the project root directory:
./mvnw clean install
On the first build, Maven will download all the dependencies from the internet and cache them in the local repository (~/.m2/repository), which can take a considerable amount of time. Subsequent builds will be faster.
Presto has a comprehensive set of unit tests that can take several minutes to run. You can disable the tests when building:
./mvnw clean install -DskipTests
Presto native is a C++ rewrite of Presto worker. Presto native uses Velox as its primary engine to run presto workloads.
Velox is a C++ database library which provides reusable, extensible, and high-performance data processing components.
Check out building instructions to get started.
After building Presto for the first time, you can load the project into your IDE and run the server. We recommend using IntelliJ IDEA. Because Presto is a standard Maven project, you can import it into your IDE using the root pom.xml file. 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 a 1.8 JDK is selected (create one if none exist)
- In the Project section, ensure the Project language level is set to 8.0 as Presto makes use of several Java 8 language features
Presto comes with sample configuration that should work out-of-the-box for development. Use the following options to create a run configuration:
- Main Class:
com.facebook.presto.server.PrestoServer - VM Options:
-ea -XX:+UseG1GC -XX:G1HeapRegionSize=32M -XX:+UseGCOverheadLimit -XX:+ExplicitGCInvokesConcurrent -Xmx2G -Dconfig=etc/config.properties -Dlog.levels-file=etc/log.properties - Working directory:
$MODULE_WORKING_DIR$or$MODULE_DIR$(Depends your version of IntelliJ) - Use classpath of module:
presto-main
The working directory should be the presto-main subdirectory. In IntelliJ, using $MODULE_DIR$ accomplishes this automatically.
Additionally, the Hive plugin must be configured with location of your Hive metastore Thrift service. Add the following to the list of VM options, replacing localhost:9083 with the correct host and port (or use the below value if you do not have a Hive metastore):
-Dhive.metastore.uri=thrift://localhost:9083
If your Hive metastore or HDFS cluster is not directly accessible to your local machine, you can use SSH port forwarding to access it. Setup a dynamic SOCKS proxy with SSH listening on local port 1080:
ssh -v -N -D 1080 server
Then add the following to the list of VM options:
-Dhive.metastore.thrift.client.socks-proxy=localhost:1080
Start the CLI to connect to the server and run SQL queries:
presto-cli/target/presto-cli-*-executable.jar
Run a query to see the nodes in the cluster:
SELECT * FROM system.runtime.nodes;
In the sample configuration, the Hive connector is mounted in the hive catalog, so you can run the following queries to show the tables in the Hive database default:
SHOW TABLES FROM hive.default;
See Contributions for guidelines around making new contributions and reviewing them.
To learn how to build the docs, see the docs README.
The Presto Web UI is composed of several React components and is written in JSX and ES6. This source code is compiled and packaged into browser-compatible JavaScript, which is then checked in to the Presto source code (in the dist folder). You must have Node.js and Yarn installed to execute these commands. To update this folder after making changes, simply run:
yarn --cwd presto-main/src/main/resources/webapp/src install
If no JavaScript dependencies have changed (i.e., no changes to package.json), it is faster to run:
yarn --cwd presto-main/src/main/resources/webapp/src run package
To simplify iteration, you can also run in watch mode, which automatically re-compiles when changes to source files are detected:
yarn --cwd presto-main/src/main/resources/webapp/src run watch
To iterate quickly, simply re-build the project in IntelliJ after packaging is complete. Project resources will be hot-reloaded and changes are reflected on browser refresh.
When authoring a pull request, the PR description should include its relevant release notes. Follow Release Notes Guidelines when authoring release notes.