Using the CData ODBC Driver for Cassandra in PyCharm

The CData ODBC Drivers can be used in any environment that supports loading an ODBC Driver. In this tutorial we will explore using the CData ODBC Driver for Cassandra from within PyCharm. Included are steps for adding the CData ODBC Driver as a data source, as well as basic PyCharm code to query the data source and display results.

To begin, this tutorial will assume that you have already installed the CData ODBC Driver for Cassandra as well as PyCharm.

Add Pyodbc to the Project

Follow the steps below to add the pyodbc module to your project.

1. Click File -> Settings to open the project settings window.
2. Click Project Interpreter from the Project: YourProjectName menu.
3. To add pyodbc, click the + button and enter pyodbc.
4. Click Install Package to install pyodbc.

Connect to Cassandra

You can now connect with an ODBC connection string or a DSN. See the Getting Started section in the CData driver documentation for a guide to creating a DSN on your OS.

Set the Server, Port, and Database connection properties to connect to Cassandra. Additionally, to use internal authentication set the User and Password connection properties.

Below is the syntax for a DSN:

[CData Cassandra Source]
Driver = CData ODBC Driver for Cassandra
Description = My Description
Database = MyCassandraDB
Port = 7000
Server = 127.0.0.1

Execute SQL to Cassandra

Instantiate a Cursor and use the execute method of the Cursor class to execute any SQL statement.

import pyodbc

cnxn = pyodbc.connect('DRIVER={CData ODBC Driver for Cassandra};Database = MyCassandraDB;Port = 7000;Server = 127.0.0.1;')
cursor = cnxn.cursor()
cursor.execute("SELECT City, TotalDue FROM Customer WHERE FirstName = 'Bob'")
rows = cursor.fetchall()
for row in rows:
 print(row.City, row.TotalDue)

After connecting to Cassandra in PyCharm using the CData ODBC Driver, you will be able to build Python apps with access to Cassandra data as if it were a standard database. If you have any questions, comments, or feedback regarding this tutorial, please contact us at [email protected].