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

Access EnterpriseDB through a standard ODBC Driver interface.

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Analyze EnterpriseDB Data in R


Create data visualizations and use high-performance statistical functions to analyze EnterpriseDB data in Microsoft R Open.

Access EnterpriseDB data with pure R script and standard SQL. You can use the CData ODBC Driver for EnterpriseDB and the RODBC package to work with remote EnterpriseDB data in R. By using the CData Driver, you are leveraging a driver written for industry-proven standards to access your data in the popular, open-source R language. This article shows how to use the driver to execute SQL queries to EnterpriseDB data and visualize EnterpriseDB data in R.

Install R

You can complement the driver's performance gains from multi-threading and managed code by running the multithreaded Microsoft R Open or by running R linked with the BLAS/LAPACK libraries. This article uses Microsoft R Open (MRO).

Connect to EnterpriseDB as an ODBC Data Source

Information for connecting to EnterpriseDB follows, along with different instructions for configuring a DSN in Windows and Linux environments.

The following connection properties are required in order to connect to data.

  • Server: The host name or IP of the server hosting the EnterpriseDB database.
  • Port: The port of the server hosting the EnterpriseDB database.

You can also optionally set the following:

  • Database: The default database to connect to when connecting to the EnterpriseDB Server. If this is not set, the user's default database will be used.

Connect Using Standard Authentication

To authenticate using standard authentication, set the following:

  • User: The user which will be used to authenticate with the EnterpriseDB server.
  • Password: The password which will be used to authenticate with the EnterpriseDB server.

Connect Using SSL Authentication

You can leverage SSL authentication to connect to EnterpriseDB data via a secure session. Configure the following connection properties to connect to data:

  • SSLClientCert: Set this to the name of the certificate store for the client certificate. Used in the case of 2-way SSL, where truststore and keystore are kept on both the client and server machines.
  • SSLClientCertPassword: If a client certificate store is password-protected, set this value to the store's password.
  • SSLClientCertSubject: The subject of the TLS/SSL client certificate. Used to locate the certificate in the store.
  • SSLClientCertType: The certificate type of the client store.
  • SSLServerCert: The certificate to be accepted from the server.

When you configure the DSN, you may also want to set the Max Rows connection property. This will limit the number of rows returned, which is especially helpful for improving performance when designing reports and visualizations.

Windows

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Linux

If you are installing the CData ODBC Driver for EnterpriseDB in a Linux environment, the driver installation predefines a system DSN. You can modify the DSN by editing the system data sources file (/etc/odbc.ini) and defining the required connection properties.

/etc/odbc.ini

[CData EnterpriseDB Source] Driver = CData ODBC Driver for EnterpriseDB Description = My Description User = postgres Password = admin Database = postgres Server = 127.0.0.1 Port = 5444

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

Load the RODBC Package

To use the driver, download the RODBC package. In RStudio, click Tools -> Install Packages and enter RODBC in the Packages box.

After installing the RODBC package, the following line loads the package:

library(RODBC)

Note: This article uses RODBC version 1.3-12. Using Microsoft R Open, you can test with the same version, using the checkpoint capabilities of Microsoft's MRAN repository. The checkpoint command enables you to install packages from a snapshot of the CRAN repository, hosted on the MRAN repository. The snapshot taken Jan. 1, 2016 contains version 1.3-12.

library(checkpoint) checkpoint("2016-01-01")

Connect to EnterpriseDB Data as an ODBC Data Source

You can connect to a DSN in R with the following line:

conn <- odbcConnect("CData EnterpriseDB Source")

Schema Discovery

The driver models EnterpriseDB APIs as relational tables, views, and stored procedures. Use the following line to retrieve the list of tables:

sqlTables(conn)

Execute SQL Queries

Use the sqlQuery function to execute any SQL query supported by the EnterpriseDB API.

orders <- sqlQuery(conn, "SELECT ShipName, ShipCity FROM Orders WHERE ShipCountry = 'USA'", believeNRows=FALSE, rows_at_time=1)

You can view the results in a data viewer window with the following command:

View(orders)

Plot EnterpriseDB Data

You can now analyze EnterpriseDB data with any of the data visualization packages available in the CRAN repository. You can create simple bar plots with the built-in bar plot function:

par(las=2,ps=10,mar=c(5,15,4,2)) barplot(orders$ShipCity, main="EnterpriseDB Orders", names.arg = orders$ShipName, horiz=TRUE)