Using an ODBC connection with Databricks
This configuration details how to connect to Databricks using an ODBC
connection. With this setup, R can connect to Databricks using the
packages. This type of configuration is the recommended approach for
connecting to Databricks from RStudio Connect and can also be used from
Advantages and limitations
- ODBC connections tend to be more stable than Spark connections. This is especially beneficial for content published to RStudio Connect.
- If code is developed using a Spark connection and
sparklyr, it is easy to swap out the connection type for an ODBC connection and the remaining code will still run.
- The Spark ODBC driver provided by Databricks was benchmarked against a native Spark connection and the performance of the two is very comparable.
Limitations: - Not all Spark features and functions are available through an ODBC connection.
[Databricks-Spark] Driver=Simba Server=<server-hostname> HOST=<server-hostname> PORT=<port> SparkServerType=3 Schema=default ThriftTransport=2 SSL=1 AuthMech=3 UID=token PWD=<personal-access-token> HTTPPath=<http-path>
Connect to Databricks
The connection can be tested from the command line using
isql -v Databricks-Spark where
Databricks-Spark is the DSN name for the
connection. If that connects successfully, then the following code can be
used to create a connection from an R session:
library(DBI) library(odbc) con <- dbConnect(odbc(), "Databricks-Spark")
For more information about ODBC connections from R, please visit db.rstudio.com.