How do I insert into a table with a frozen type with the Java driver? - cassandra

Question

I am trying to write a query to insert data in the table "users". How do I write the query to insert into users? And how do i write the code in Java
CREATE TYPE address (
street text,
city text,
zip int
);
CREATE TABLE users (
login text PRIMARY KEY,
first_name text,
last_name text,
email text,
addresses map<text, address>
);
And how do I write the code below correctly in java?
public void insertHotels(String login, String first_name, String last_name, String email, addresses) {
Cluster cluster = Cluster.builder()
.addContactPoints(serverIP)
.build();
try (Session session = cluster.connect("hotel_db")) {
String insert_query = "INSERT INTO users (login, first_name, last_name, email, address) VALUES (?, ?, ?, ?, ?);"
PreparedStatement pStatement = session.prepare(insert_query);
BoundStatement bStatement = pStatement.bind(login, first_name, last_name, email, address);
session.execute(bStatement);
}
}

Answer 1

I'm assuming you're using 4.15.0 version of Java driver here. I'm using DataStax Astra DB for my demonstration.
The table looks like,
CREATE TABLE payloadtest.users (
login text PRIMARY KEY,
addresses map<text, frozen<address>>,
email text,
first_name text,
last_name text
)...;
Your code will look like,
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import com.datastax.oss.driver.api.core.CqlSession;
import com.datastax.oss.driver.api.core.cql.BoundStatement;
import com.datastax.oss.driver.api.core.cql.PreparedStatement;
import com.datastax.oss.driver.api.core.data.UdtValue;
import com.datastax.oss.driver.api.core.type.UserDefinedType;
public class UdtValueExample {
private static final String KEYSPACE = "payloadtest";
private static final String UDT_ADDRESSES = "addresses";
public static void main(String... args) {
// Create the CqlSession object:
try (CqlSession session = CqlSession.builder()
.withCloudSecureConnectBundle(Paths.get("./src/main/resources/secure-connect-payloadtest.zip"))
//Org Admin Role
.withAuthCredentials("CHANGE_ME", "AstraCS:CHANGE_ME")
.build()) {
PreparedStatement ps = session.prepare("INSERT INTO payloadtest.users(login,first_name,last_name,email,addresses) VALUES (?,?,?,?,?)");
// User define type
UserDefinedType addressesUdt = session.getMetadata()
.getKeyspace(KEYSPACE)
.flatMap(ks -> ks.getUserDefinedType("address"))
.orElseThrow(() -> new IllegalArgumentException("Missing UDT definition"));
UdtValue addressUdtValue = addressesUdt.newValue("some_street", "some_city", 12345);
Map<String, UdtValue> addressesMap = new HashMap<>();
addressesMap.put("key1", addressUdtValue);
BoundStatement bs =
ps.boundStatementBuilder()
.setString("login", "some_login")
.setString("email", "some#email.com")
.setString("first_name", "first")
.setString("last_name", "last")
.setMap(UDT_ADDRESSES, addressesMap, String.class, UdtValue.class)
.build();
session.execute(bs);
}
System.out.println("COMPLETED");
}
}
and results would look like,
token#cqlsh:payloadtest> select * from users;
login | addresses | email | first_name | last_name
------------+------------------------------------------------------------------+----------------+------------+-----------
some_login | {'key1': {street: 'some_street', city: 'some_city', zip: 12345}} | some#email.com | first | last
(1 rows)
Read References:
Documentation
Example repo