Install a Postgres Client

Drivers

psycopg2

Support level: Full

To install the Python psycopg2 driver:

$ pip install psycopg2

For other ways to install psycopg2, see the official documentation.

For a simple but complete "Hello World" example app, see Build a Python App with CockroachDB and psycopg2.

ORMs

SQLAlchemy

Support level: Full

To install SQLAlchemy and a CockroachDB Python package that accounts for some differences between CockroachDB and PostgreSQL:

$ pip install sqlalchemy sqlalchemy-cockroachdb psycopg2

For other ways to install SQLAlchemy, see the official documentation.

For a simple but complete "Hello World" example app, see Build a Python App with CockroachDB and SQLAlchemy.

Django

Support level: Full

CockroachDB supports Django versions 2.2 and 3.0.

To install Django:

$ python -m pip install django==3.0.*

Before installing the CockroachDB backend for Django, you must install one of the following psycopg2 prerequisites:

• psycopg2, which has some prerequisites of its own. This package is recommended for production environments.

• psycopg2-binary. This package is recommended for development and testing.

After you install the psycopg2 prerequisite, you can install the CockroachDB Django backend:

$ python -m pip install django-cockroachdb==3.0.*

For a simple but complete "Hello World" example app, see Build a Python App with CockroachDB and Django.

PonyORM

Support level: Full

To install PonyORM:

$ python -m pip install pony

For a simple but complete "Hello World" example app, see Build a Python App with CockroachDB and PonyORM.

peewee

Support level: Full

To install peewee:

$ python -m pip install peewee

For instructions on using peewee with CockroachDB, see the CockroachDatabase peewee extension documentation.

Drivers

JDBC

Support level: Full

Download and set up the Java JDBC driver as described in the official documentation. We recommend using the latest PostgreSQL JDBC 42.2.x driver.

For a simple but complete "Hello World" example app, see Build a Java App with CockroachDB and JDBC.

ORMs

Hibernate

Support level: Full

You can use Gradle or Maven to get all dependencies for your application, including Hibernate. Only Hibernate versions 5.4.19 and later support the Hibernate CockroachDB dialect.

If you are using Gradle, add the following to your dependencies:

implementation 'org.hibernate:hibernate-core:5.4.19.Final'
implementation 'org.postgresql:postgresql:42.2.14'

If you are using Maven, add the following to your <dependencies>:

<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-core</artifactId>
    <version>5.4.19.Final</version>
</dependency>
<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
</dependency>

You will also need to specify the CockroachDB dialect in your Hibernate configuration file. Versions of the Hibernate CockroachDB dialect correspond to the version of CockroachDB installed on your machine. For example, org.hibernate.dialect.CockroachDB201Dialect corresponds to CockroachDB v20.1, and org.hibernate.dialect.CockroachDB192Dialect corresponds to CockroachDB v19.2.

All dialect versions are forward-compatible (e.g., CockroachDB v20.1 is compatible with CockroachDB192Dialect), as long as your application is not affected by any backward-incompatible changes listed in your CockroachDB version's release notes. In the event of a CockroachDB version upgrade, using a previous version of the CockroachDB dialect will not break an application, but, to enable all features available in your version of CockroachDB, we recommend keeping the dialect version in sync with the installed version of CockroachDB.

For a simple but complete "Hello World" example app, see Build a Java App with CockroachDB and Hibernate.

jOOQ

Support level: Full

You can use Gradle or Maven to get all dependencies for your application, including jOOQ.

For a simple but complete "Hello World" example app that uses Maven for dependency management, see Build a Java App with CockroachDB and jOOQ.

Drivers

pq

Support level: Full

To install the Go pq driver:

$ go get -u github.com/lib/pq

For a simple but complete "Hello World" example app, see Build a Go App with CockroachDB and the Go pq Driver.

ORMs

GORM

Support level: Full

To install GORM:

$ go get -u github.com/lib/pq # dependency

$ go get -u github.com/jinzhu/gorm

For a simple but complete "Hello World" example app, see Build a Go App with CockroachDB and GORM.

Drivers

pg

Support level: Beta

To install the Ruby pg driver:

$ gem install pg

For a simple but complete "Hello World" example app, see Build a Ruby App with CockroachDB and the Ruby pg Driver.

ORMs

ActiveRecord

Support level: Beta

To install ActiveRecord, the pg driver, and a CockroachDB Ruby package that accounts for some minor differences between CockroachDB and PostgreSQL:

$ gem install activerecord pg activerecord-cockroachdb-adapter

For a simple but complete "Hello World" example app, see Build a Ruby App with CockroachDB and ActiveRecord.

Drivers

pg

Support level: Beta

To install the Node.js pg driver:

$ npm install pg

Some apps might also requires async:

$ npm install async

For a simple but complete "Hello World" example app, see Build a Node.js App with CockroachDB and the Node.js pg Driver.

ORMs

Sequelize

Support level: Beta

To install Sequelize and a CockroachDB Node.js package that accounts for some minor differences between CockroachDB and PostgreSQL:

$ npm install sequelize sequelize-cockroachdb

For a simple but complete "Hello World" example app, see Build a Node.js App with CockroachDB and Sequelize.

Drivers

libpq

Support level: Beta

Install the C libpq driver as described in the official documentation.

Drivers

libpqxx

Support level: Beta

Install the C++ libpqxx driver as described in the official documentation.

For a simple but complete "Hello World" example app, see Build a C++ App with CockroachDB and libpqxx.

Drivers

Npgsql

Support level: Beta

1. Create a .NET project:

   $ dotnet new console -o cockroachdb-test-app
   

   $ cd cockroachdb-test-app
   

   The dotnet command creates a new app of type console. The -o parameter creates a directory named cockroachdb-test-app where your app will be stored and populates it with the required files. The cd cockroachdb-test-app command puts you into the newly created app directory.

2. Install the latest version of the Npgsql driver into the .NET project using the built-in nuget package manager:

   $ dotnet add package Npgsql
   

For a simple but complete "Hello World" example app, see Build a C# App with CockroachDB and the .NET Npgsql Driver.

Drivers

leiningen

Support level: Beta

Install the Clojure lein utility as described in its official documentation.

For a simple but complete "Hello World" example app, see Build a Closure App with CockroachDB and java.jdbc.

Drivers

php-pgsql

Support level: Beta

Install the php-pgsql driver as described in the official documentation.

For a simple but complete "Hello World" example app, see Build a PHP App with CockroachDB and the PHP pgsql Driver.

Drivers

postgres

Support level: Beta

Install the Rust Postgres driver as described in the official documentation.

For a simple but complete "Hello World" example app, see Build a Rust App with CockroachDB and the Rust Postgres Driver.

ORMs

TypeORM

Support level: Beta

Install TypeORM as described in the official documentation.