The cloudsql package

import ""


Package cloudsql exposes access to Google Cloud SQL databases.

This package does not work in App Engine "flexible environment".

This package is intended for MySQL drivers to make App Engine-specific connections. Applications should use this package through database/sql: Select a pure Go MySQL driver that supports this package, and use sql.Open with protocol "cloudsql" and an address of the Cloud SQL instance.

A Go MySQL driver that has been tested to work well with Cloud SQL is the go-sql-driver:

import "database/sql"
import _ ""

db, err := sql.Open("mysql", "user@cloudsql(project-id:instance-name)/dbname")

Another driver that works well with Cloud SQL is the mymysql driver:

import "database/sql"
import _ ""

db, err := sql.Open("mymysql", "cloudsql:instance-name*dbname/user/password")

Using either of these drivers, you can perform a standard SQL query. This example assumes there is a table named 'users' with columns 'first_name' and 'last_name':

rows, err := db.Query("SELECT first_name, last_name FROM users")
if err != nil {
    log.Errorf(ctx, "db.Query: %v", err)
defer rows.Close()

for rows.Next() {
    var firstName string
    var lastName string
    if err := rows.Scan(&firstName, &lastName); err != nil {
        log.Errorf(ctx, "rows.Scan: %v", err)
    log.Infof(ctx, "First: %v - Last: %v", firstName, lastName)
if err := rows.Err(); err != nil {
    log.Errorf(ctx, "Row error: %v", err)


func Dial(instance string) (net.Conn, error)

func Dial

func Dial(instance string) (net.Conn, error)

Dial connects to the named Cloud SQL instance.

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App Engine standard environment for Go