Writing to Cassandra Database

Cassandra is a popular NoSQL database that is known for its scalability and high availability. If you are a web developer working with PHP and JavaScript, you may need to interact with Cassandra in your projects. In this article, we will discuss how to write data to a Cassandra database using PHP and JavaScript.

Connecting to Cassandra

Before you can write data to a Cassandra database, you need to establish a connection to the database. You can use the DataStax PHP Driver for Cassandra to connect to the database from your PHP application. Similarly, you can use the DataStax Node.js Driver for Cassandra to connect from your JavaScript application.

Creating a Keyspace and Table

Once you have successfully connected to the Cassandra database, you need to create a keyspace and a table to store your data. A keyspace is a namespace that defines the replication strategy for your data, while a table defines the schema for your data.

PHP

• Use the PHP driver to execute a CQL query to create a keyspace:

$session->execute("CREATE KEYSPACE IF NOT EXISTS mykeyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1}");

• Use another CQL query to create a table:

$session->execute("CREATE TABLE IF NOT EXISTS mykeyspace.mytable (id UUID PRIMARY KEY, name TEXT, age INT)");

JavaScript

• Use the Node.js driver to execute a CQL query to create a keyspace:

client.execute("CREATE KEYSPACE IF NOT EXISTS mykeyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1}", (err) => {...});

• Use another CQL query to create a table:

client.execute("CREATE TABLE IF NOT EXISTS mykeyspace.mytable (id UUID PRIMARY KEY, name TEXT, age INT)", (err) => {...});

Inserting Data

After creating the keyspace and table, you can start inserting data into the Cassandra database.

PHP

• Use the PHP driver to execute a CQL query to insert data into the table:

$session->execute("INSERT INTO mykeyspace.mytable (id, name, age) VALUES (uuid(), 'Alice', 30)");

JavaScript

• Use the Node.js driver to execute a CQL query to insert data into the table:

client.execute("INSERT INTO mykeyspace.mytable (id, name, age) VALUES (uuid(), 'Bob', 25)", (err) => {...});

Conclusion

Interacting with a Cassandra database from PHP and JavaScript is relatively straightforward once you have established a connection and created the necessary keyspace and table. By following the steps outlined in this article, you can successfully write data to a Cassandra database in your web applications.