Simple Go Application for YugabyteDB

The application connects to your YugabyteDB instance via Go PostgreSQL driver and performs basic SQL operations. The instructions below are provided for YugabyteDB Aeon deployments. If you use a different type of deployment, then update the sample-app.go file with proper connection parameters.

Prerequisites

Go version 1.17.6 or later is preffered. Earlier versions should work as well.
Command line tool or your favourite IDE, such as Visual Studio Code.

Start YugabyteDB Aeon Cluster

Start YugabyteDB Aeon instance. Free tier exists.
Add an IP address of your machine/laptop to the IP allow list

Clone Application Repository

Clone the application to your machine:

git clone https://github.com/YugabyteDB-Samples/yugabyte-simple-go-app.git && cd yugabyte-simple-go-app

Provide Cluster Connection Parameters

The application needs to establish a secured connection to your YugabyteDB Aeon instance.

Open the sample-app.go file and specify the following configuration parameters:

host - the hostname of your instance.
port - the port number of your instance (the default is 5433).
dbUser - the username for your instance.
dbPassword - the database password.
sslMode - the SSL mode. Set to verify-full for YugabyteDB Aeon deployments.
sslRootCert - a full path to your CA root cert (for example, /Users/dmagda/certificates/root.crt)

Note, you can easily find all the settings on the YugabyteDB Aeon dashboard:

Build and Run Application

Initialize the GO111MODULE variable:
```
export GO111MODULE=auto
```
Import the Go PostgreSQL driver:
```
go get github.com/lib/pq
```
Run the application:
```
go run sample-app.go
```

Upon successful execution, you will see output similar to the following:

>>>> Successfully connected to YugabyteDB!
>>>> Successfully created table DemoAccount.
>>>> Selecting accounts:
name = Jessica, age = 28, country = USA, balance = 10000
name = John, age = 28, country = Canada, balance = 9000
>>>> Transferred 800 between accounts.
>>>> Selecting accounts:
name = Jessica, age = 28, country = USA, balance = 9200
name = John, age = 28, country = Canada, balance = 9800

Explore App Logic

Congrats! You've successfully executed a simple Go app that works with YugabyteDB.

Now, explore the source code of sample-app.go:

main function - establishes a connection with your cloud instance via Go PostgreSQL driver.
createDatabase function - creates a table and populates it with sample data.
selectAccounts function - queries the data with SQL SELECT statements.
transferMoneyBetweenAccounts function - updates records consistently with distributed transactions.

Questions or Issues?

Having issues running this application or want to learn more from Yugabyte experts?

Join our Slack channel, or raise a question on StackOverflow and tag the question with yugabytedb!

# README