Google Git
Sign in
apache / spark-connect-go / e93f73b471f6949f975db02b986f917c1b19f064
commite93f73b471f6949f975db02b986f917c1b19f064[log] [tgz]
authorMartin Grund <martin.grund@databricks.com>Mon Aug 26 10:07:11 2024 +0200
committerMartin Grund <martin.grund@databricks.com>Mon Aug 26 10:07:11 2024 +0200
treeaee0e58d14c0c60419f4078476727f0cf2e6798d
parentb05a60228c217f40f37e9f0b78ddf69f36e0da6e [diff]
[#58] Adding Support for select, selectExpr, crossJoin, and Alias

### What changes were proposed in this pull request?
Adds support in the DataFrame for:

* `Alias`
*  `Select`
*  `SelectExpr`
*  `CrossJoin`

### Why are the changes needed?
Compatibility

### Does this PR introduce _any_ user-facing change?
Yes

### How was this patch tested?
Added new integration tests.

Closes #59 from grundprinzip/df_functions_v1.

Authored-by: Martin Grund <martin.grund@databricks.com>
Signed-off-by: Martin Grund <martin.grund@databricks.com>
2 files changed
tree: aee0e58d14c0c60419f4078476727f0cf2e6798d
  1. .github/
  2. cmd/
  3. dev/
  4. internal/
  5. spark/
  6. sparksrc
  7. .asf.yaml
  8. .gitignore
  9. .gitmodules
  10. .golangci.yml
  11. buf.gen.yaml
  12. buf.work.yaml
  13. CONTRIBUTING.md
  14. go.mod
  15. go.sum
  16. LICENSE
  17. Makefile
  18. merge_connect_go_pr.py
  19. quick-start.md
  20. README.md
README.md

Apache Spark Connect Client for Golang

This project houses the experimental client for Spark Connect for Apache Spark written in Golang.

Current State of the Project

Currently, the Spark Connect client for Golang is highly experimental and should not be used in any production setting. In addition, the PMC of the Apache Spark project reserves the right to withdraw and abandon the development of this project if it is not sustainable.

Getting started

This section explains how to run Spark Connect Go locally.

Step 1: Install Golang: https://go.dev/doc/install.

Step 2: Ensure you have installed buf CLI installed, more info here

Step 3: Run the following commands to setup the Spark Connect client.

git clone https://github.com/apache/spark-connect-go.git
git submodule update --init --recursive

make gen && make test

Step 4: Setup the Spark Driver on localhost.

  1. Download Spark distribution (3.5.0+), unzip the package.

  2. Start the Spark Connect server with the following command (make sure to use a package version that matches your Spark distribution):

sbin/start-connect-server.sh --packages org.apache.spark:spark-connect_2.12:3.5.2

Step 5: Run the example Go application.

go run cmd/spark-connect-example-spark-session/main.go

How to write Spark Connect Go Application in your own project

See Quick Start Guide

High Level Design

The overall goal of the design is to find a good balance of principle of the least surprise for develoeprs that are familiar with the APIs of Apache Spark and idiomatic Go usage. The high-level structure of the packages follows roughly the PySpark giudance but with Go idioms.

Contributing

Please review the Contribution to Spark guide for information on how to get started contributing to the project.