go-athena

go-athena is a simple Golang database/sql driver for Amazon Athena.

import (
    "database/sql"
    _ "github.com/segmentio/go-athena"
)

func main() {
  db, _ := sql.Open("athena", "db=default&output_location=s3://results")
  rows, _ := db.Query("SELECT url, code from cloudfront")

  for rows.Next() {
    var url string
    var code int
    rows.Scan(&url, &code)
  }
}

It provides a higher-level, idiomatic wrapper over the AWS Go SDK, comparable to the Athena JDBC driver AWS provides for Java users.

For example,

• Instead of manually parsing types from strings, you can use database/sql.Rows.Scan()
• Instead of reaching for semaphores, you can use database/sql.DB.SetMaxOpenConns
• And, so on...

Caveats

database/sql exposes lots of methods that aren't supported in Athena. For example, Athena doesn't support transactions so Begin() is irrelevant. If a method must be supplied to satisfy a standard library interface but is unsupported, the driver will panic indicating so. If there are new offerings in Athena and/or helpful additions, feel free to PR.

Testing

Athena doesn't have a local version and revolves around S3 so our tests are integration tests against AWS itself. Thus, our tests require AWS credentials. The simplest way to provide them is via AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables, but you can use anything supported by the Default Credential Provider Chain.

The tests support a few environment variables:

• ATHENA_DATABASE can be used to override the default database "go_athena_tests"
• S3_BUCKET can be used to override the default S3 bucket of "go-athena-tests"