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The HubDB ODBC Driver is a powerful tool that allows you to connect with live data from HubDB, directly from any applications that support ODBC connectivity.

Access HubDB data like you would a database - read, write, and update HubDB 0, etc. through a standard ODBC Driver interface.

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Write a Simple Go Application to work with HubDB Data on Linux


Use CData ODBC drivers and unixODBC to create a simple Go app with live connectivity to HubDB data.

Go is an open source programming language that enables you to easily build software on Linux/UNIX machines. When Go is paired with the ODBC Driver for HubDB and unixODBC you are able write applications with connectivity to live HubDB data. This article will walk you through the process of installing the ODBC Driver for HubDB, configuring a connection using the unixODBC Driver Manager, and creating a simple Go application to work with HubDB data.

Using the CData ODBC Drivers on a Unix/Linux Machine

The CData ODBC Drivers are supported in various Red Hat-based and Debian-based systems, including Ubuntu, Debian, RHEL, CentOS, and Fedora. There are also several libraries and packages that are required, many of which may be installed by default, depending on your system. For more information on the supported versions of Linux operating systems and the required libraries, please refer to the "Getting Started" section in help documentation (installed and found online).

Installing the Driver Manager

Before installing the driver, you need to be sure that your system has a driver manager. For this article, you will use unixODBC, a free and open source ODBC driver manager that is widely supported.

For Debian-based systems like Ubuntu, you can install unixODBC with the APT package manager:

apt-get install unixodbc unixodbc-dev

For systems based on Red Hat Linux, you can install unixODBC with yum or dnf:

yum install unixODBC unixODBC-devel

The unixODBC driver manager reads information about drivers from an odbcinst.ini file and about data sources from an odbc.ini file. You can determine the location of the configuration files on your system by entering the following command into a terminal:

odbcinst -j

NOTE: You may need to install odbcinst. Use the following command in a terminal:

apt install odbcinst

The output of the command will display the locations of the configuration files for ODBC data sources and registered ODBC drivers. User data sources can only be accessed by the user account whose home folder the odbc.ini is located in. System data sources can be accessed by all users. Below is an example of the output of this command:

DRIVERS............: /etc/odbcinst.ini SYSTEM DATA SOURCES: /etc/odbc.ini FILE DATA SOURCES..: /etc/ODBCDataSources USER DATA SOURCES..: /home/myuser/.odbc.ini SQLULEN Size.......: 8 SQLLEN Size........: 8 SQLSETPOSIROW Size.: 8

Installing the Driver

You can download the driver in standard package formats: the Debian .deb package format or the .rpm file format. Once you have downloaded the file, you can install the driver from the terminal.

The driver installer registers the driver with unixODBC and creates a system DSN, which can be used later in any tools or applications that support ODBC connectivity.

For Debian-based systems like Ubuntu, run the following command with sudo or as root: dpkg -i /path/to/package.deb

For systems that support .rpms, run the following command with sudo or as root: rpm -i /path/to/package.rpm

Once the driver is installed, you can list the registered drivers and defined data sources using the unixODBC driver manager:

List the Registered Driver(s)

odbcinst -q -d CData ODBC Driver for HubDB ...

List the Defined Data Source(s)

odbcinst -q -s CData HubDB Source ...

To use the CData ODBC Driver for HubDB with unixODBC, you need to ensure that the driver is configured to use UTF-16. To do so, edit the INI file for the driver (cdata.odbc.hubdb.ini), which can be found in the lib folder in the installation location (typically /opt/cdata/cdata-odbc-driver-for-hubdb), as follows:

cdata.odbc.hubdb.ini

... [Driver] DriverManagerEncoding = UTF-16

Modifying the DSN

When the driver is installed, a system DSN should be predefined. You can modify the DSN by editing the system data sources file (/etc/odbc.ini) and defining the required connection properties. Additionally, you can create user-specific DSNs that will not require root access to modify in $HOME/.odbc.ini.

There are two authentication methods available for connecting to HubDB data source: OAuth Authentication with a public HubSpot application and authentication with a Private application token.

Using a Custom OAuth App

AuthScheme must be set to "OAuth" in all OAuth flows. Be sure to review the Help documentation for the required connection properties for you specific authentication needs (desktop applications, web applications, and headless machines).

Follow the steps below to register an application and obtain the OAuth client credentials:

  1. Log into your HubSpot app developer account.
    • Note that it must be an app developer account. Standard HubSpot accounts cannot create public apps.
  2. On the developer account home page, click the Apps tab.
  3. Click Create app.
  4. On the App info tab, enter and optionally modify values that are displayed to users when they connect. These values include the public application name, application logo, and a description of the application.
  5. On the Auth tab, supply a callback URL in the "Redirect URLs" box.
    • If you're creating a desktop application, set this to a locally accessible URL like http://localhost:33333.
    • If you are creating a Web application, set this to a trusted URL where you want users to be redirected to when they authorize your application.
  6. Click Create App. HubSpot then generates the application, along with its associated credentials.
  7. On the Auth tab, note the Client ID and Client secret. You will use these later to configure the driver.

  8. Under Scopes, select any scopes you need for your application's intended functionality.

    A minimum of the following scopes is required to access tables:

    • hubdb
    • oauth
    • crm.objects.owners.read
  9. Click Save changes.
  10. Install the application into a production portal with access to the features that are required by the integration.
    • Under "Install URL (OAuth)", click Copy full URL to copy the installation URL for your application.
    • Navigate to the copied link in your browser. Select a standard account in which to install the application.
    • Click Connect app. You can close the resulting tab.

Using a Private App

To connect using a HubSpot private application token, set the AuthScheme property to "PrivateApp."

You can generate a private application token by following the steps below:

  1. In your HubDB account, click the settings icon (the gear) in the main navigation bar.
  2. In the left sidebar menu, navigate to Integrations > Private Apps.
  3. Click Create private app.
  4. On the Basic Info tab, configure the details of your application (name, logo, and description).
  5. On the Scopes tab, select Read or Write for each scope you want your private application to be able to access.
  6. A minimum of hubdb and crm.objects.owners.read is required to access tables.
  7. After you are done configuring your application, click Create app in the top right.
  8. Review the info about your application's access token, click Continue creating, and then Show token.
  9. Click Copy to copy the private application token.

To connect, set PrivateAppToken to the private application token you retrieved.

/etc/odbc.ini or $HOME/.odbc.ini

[CData HubDB Source] Driver = /opt/cdata/cdata-odbc-driver-for-hubdb/lib/libhubdbodbc.x64.so Description = My Description AuthScheme = OAuth OAuthClientID = MyOAuthClientID OAuthClientSecret = MyOAuthClientSecret CallbackURL = http://localhost:33333

For specific information on using these configuration files, please refer to the help documentation (installed and found online).

Creating a Simple Go App for HubDB Data

With the Driver Manager installed and the DSN configured, you are ready to create a simple Go application to work with your HubDB data. To start, install a Go driver for ODBC databases. While there are several options available, this article will use the odbc driver found at https://github.com/alexbrainman/odbc.

Installing ODBC on Linux

There are a series of steps required to install the ODBC driver for Go.

  1. Create the $HOME/golang/go path (if it does not exist) by entering the following commands in a terminal: mkdir /root/golang mkdir /root/golang/go
  2. Define the GOPATH environment variable: export GOPATH=$HOME/golang/go
  3. Create a module inside the new Go directory: cd $GOPATH go mod init myproject
  4. Install the Go driver for ODBC databases:

    go get http://github.com/alexbrainman/odbc

Now you are ready to create and execute a simple Go application.

Sample Go Application

The sample application issues a simple SQL SELECT query for HubDB data and displays the results. Create the directory $GOPATH/src/cdata-odbc-hubdb and create a new Go source file, copying the source code from below.

cdata-odbc-hubdb.go

package main import ( _ "github.com/alexbrainman/odbc" "database/sql" "log" "fmt" ) func main() { db, err := sql.Open("odbc", "DSN=CData HubDB Source") if err != nil { log.Fatal(err) } var ( partitionkey string name string ) rows, err := db.Query("SELECT PartitionKey, Name FROM NorthwindProducts WHERE Id = ?", "1") if err != nil { log.Fatal(err) } defer rows.Close() for rows.Next() { err := rows.Scan(&partitionkey, &name) if err != nil { log.Fatal(err) } fmt.Println(partitionkey, name) } err = rows.Err() if err != nil { log.Fatal(err) } defer db.Close() }

In the terminal, navigate to the Go application directory and build the application:

go build

After the application builds, you will be able to execute the application, displaying your HubDB data:

./cdata-odbc-hubdb

At this point, you have a simple Go application for working with HubDB data. From here, you can easily expand the application, adding deeper read/write functionality through familiar SQL queries.