title: great_expectations data validation on Cassandra
body: <p>I have multiple tables in a Cassandra keyspace. I want to use Great Expectations to validate my data. I've been trying to use Spark to load data from Cassandra and I was able to create RuntimeBatchRequest using Spark dataframes. However I need to create checkpoints and validate new data as a routine. Can anyone tell how to configure Great Expectations for this purpose? Also I would appreciate any suggestions regarding data validation on Cassandra.</p>