Iceberg Golang

iceberg is a Golang implementation of the Iceberg table spec.

Build From Source

Prerequisites

• Go 1.25 or later

Build

$ git clone https://github.com/apache/iceberg-go.git
$ cd iceberg-go/cmd/iceberg && go build .

Running Tests

Use the Makefile so commands stay in sync with CI (e.g. golangci-lint version).

Unit tests

make test

Linting

make lint

Install the linter first

make lint-install
# or: go install github.com/golangci/golangci-lint/cmd/golangci-lint@v2.8.0

Integration tests

Prerequisites: Docker, Docker Compose

1. Start the Docker containers using docker compose:

   make integration-setup
   

2. Export the required environment variables:

   export AWS_S3_ENDPOINT=http://$(docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' minio):9000
   export AWS_REGION=us-east-1
   export SPARK_CONTAINER_ID=$(docker ps -qf 'name=spark-iceberg')
   export DOCKER_API_VER=$(docker version -f '{{.Server.APIVersion}}')
   

3. Run the integration tests:

   make integration-test
   

   Or run a single suite: make integration-scanner, make integration-io, make integration-rest, make integration-spark.

Feature Support / Roadmap

FileSystem Support

Filesystem Type	Supported
S3	X
Google Cloud Storage	X
Azure Blob Storage	X
Local Filesystem	X

Metadata

Operation	Supported
Get Schema	X
Get Snapshots	X
Get Sort Orders	X
Get Partition Specs	X
Get Manifests	X
Create New Manifests	X
Plan Scan	x
Plan Scan for Snapshot	x

Catalog Support

Operation	REST	Hive	Glue	SQL	Hadoop
Load Table	X	X	X	X	X
List Tables	X	X	X	X	X
Create Table	X	X	X	X	X
Register Table	X	X	X
Update Current Snapshot	X	X	X	X	X
Create New Snapshot	X	X	X	X	X
Rename Table	X	X	X	X
Drop Table	X	X	X	X	X
Alter Table	X	X	X	X	X
Check Table Exists	X	X	X	X	X
Set Table Properties	X	X	X	X	X
List Namespaces	X	X	X	X	X
Create Namespace	X	X	X	X	X
Check Namespace Exists	X	X	X	X	X
Drop Namespace	X	X	X	X	X
Update Namespace Properties	X	X	X	X
Create View	X	X		X
Load View		X		X
List View	X	X		X
Drop View	X	X		X
Check View Exists	X	X		X

Read/Write Data Support

• Data can currently be read as an Arrow Table or as a stream of Arrow record batches.

Supported Write Operations

As long as the FileSystem is supported and the Catalog supports altering the table, the following tracks the current write support:

Operation	Supported
Append Stream	X
Append Data Files	X
Rewrite Files
Rewrite manifests
Overwrite Files	X
Copy-On-Write Delete	X
Write Pos Delete	X
Write Eq Delete
Row Delta

CLI Usage

Run go build ./cmd/iceberg from the root of this repository to build the CLI executable, alternately you can run go install github.com/apache/iceberg-go/cmd/iceberg@latest to install it to the bin directory of your GOPATH.

The iceberg CLI usage is very similar to pyiceberg CLI
You can pass the catalog URI with --uri argument.

Example: You can start the Iceberg REST API docker image which runs on default in port 8181

docker pull apache/iceberg-rest-fixture:latest
docker run -p 8181:8181 apache/iceberg-rest-fixture:latest

and run the iceberg CLI pointing to the REST API server.

 ./iceberg --uri http://0.0.0.0:8181 list
┌─────┐
| IDs |
| --- |
└─────┘

Create Namespace

./iceberg --uri http://0.0.0.0:8181 create namespace taxitrips

List Namespace

 ./iceberg --uri http://0.0.0.0:8181 list
┌───────────┐
| IDs       |
| --------- |
| taxitrips |
└───────────┘

Get in Touch

• Iceberg community