Connect an application


This tutorial assumes that you have:

  • installed YugabyteDB, created a universe and are able to interact with it using the YCQL shell. If not, follow these steps in Quick start.
  • installed Go version 1.13 or later.

Install the Yugabyte Go Driver for YCQL

To install the Yugabyte Go Driver for YCQL locally, run the following command:

$ go get

Write the YCQL sample application

Create a file ybcql_hello_world.go and copy the contents below into it.

package main;

import (


func main() {
    // Connect to the cluster.
    cluster := gocql.NewCluster("", "", "")

    // Use the same timeout as the Java driver.
    cluster.Timeout = 12 * time.Second

    // Create the session.
    session, _ := cluster.CreateSession()
    defer session.Close()

    // Set up the keyspace and table.
    if err := session.Query("CREATE KEYSPACE IF NOT EXISTS ybdemo").Exec(); err != nil {
    fmt.Println("Created keyspace ybdemo")

    if err := session.Query(`DROP TABLE IF EXISTS ybdemo.employee`).Exec(); err != nil {
    var createStmt = `CREATE TABLE ybdemo.employee (id int PRIMARY KEY,
                                                           name varchar,
                                                           age int,
                                                           language varchar)`;
    if err := session.Query(createStmt).Exec(); err != nil {
    fmt.Println("Created table ybdemo.employee")

    // Insert into the table.
    var insertStmt string = "INSERT INTO ybdemo.employee(id, name, age, language)" +
        " VALUES (1, 'John', 35, 'Go')";
    if err := session.Query(insertStmt).Exec(); err != nil {
    fmt.Printf("Inserted data: %s\n", insertStmt)

    // Read from the table.
    var name string
    var age int
    var language string
    iter := session.Query(`SELECT name, age, language FROM ybdemo.employee WHERE id = 1`).Iter()
    fmt.Printf("Query for id=1 returned: ");
    for iter.Scan(&name, &age, &language) {
        fmt.Printf("Row[%s, %d, %s]\n", name, age, language)

    if err := iter.Close(); err != nil {

Run the application

To use the application, run the following go run command:

$ go run ybcql_hello_world.go

You should see the following as the output.

Created keyspace ybdemo
Created table ybdemo.employee
Inserted data: INSERT INTO ybdemo.employee(id, name, age, language) VALUES (1, 'John', 35, 'Go')
Query for id=1 returned: Row[John, 35, Go]