Accessing Data : Accessing Cassandra data : Specifying the data to retrieve from a Cassandra data source
 
Specifying the data to retrieve from a Cassandra data source
To specify what data rows to retrieve from a Cassandra database system, you write a query using CQL. In the BIRT Report Designer interface, you can specify the following types of clauses to create your CQL query:
*open
*describe
*fetch
*close
*beforeOpen
*beforeClose
*onFetch
*afterOpen
*afterClose