How to stream query results using apache cassandra?

@dedrick 

Streaming query results in Apache Cassandra can be achieved using the Java driver provided by DataStax. Here is an example code snippet to demonstrate how to stream query results:

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import com.datastax.driver.core.*;

public class CassandraExample {

    public void streamQueryResults() {
        Cluster cluster = Cluster.builder()
                .addContactPoint("127.0.0.1")
                .build();

        Session session = cluster.connect("my_keyspace");

        // Create a query
        String query = "SELECT * FROM my_table";
        ResultSet resultSet = session.execute(query);

        resultSet.forEach(row -> {
            // Process each row from the result set
            System.out.println(row.getString("column_name"));
        });

        cluster.close();
    }

    public static void main(String[] args) {
        CassandraExample example = new CassandraExample();
        example.streamQueryResults();
    }
}

In this example, we first create a Cluster object by specifying the contact point (IP address of a Cassandra node) and then connect to a specific keyspace using the Session object. We then execute our query and iterate over the ResultSet using the forEach method to process each row.

Remember to replace my_keyspace and my_table with the actual keyspace and table names in your Cassandra database. Also, don't forget to include the DataStax Java driver in your project dependencies.

By using the forEach method, we can process the query results one row at a time, which is useful for large result sets as it allows us to stream the data instead of loading it all into memory at once.

Please note that streaming query results can impact performance, especially for large datasets, so ensure that you handle the data efficiently to avoid memory issues.