test/unit/org/apache/cassandra/cql3/PreparedStatementsTest.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *     http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cassandra.cql3;

import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.exceptions.SyntaxError;
import org.apache.cassandra.SchemaLoader;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.config.Schema;
import org.apache.cassandra.index.StubIndex;
import org.apache.cassandra.service.EmbeddedCassandraService;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

public class PreparedStatementsTest extends SchemaLoader
{
    private static Cluster cluster;
    private static Session session;

    private static final String KEYSPACE = "prepared_stmt_cleanup";
    private static final String createKsStatement = "CREATE KEYSPACE " + KEYSPACE +
                                                    " WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 1 };";
    private static final String dropKsStatement = "DROP KEYSPACE IF EXISTS " + KEYSPACE;

    @BeforeClass
    public static void setup() throws Exception
    {
        Schema.instance.clear();

        EmbeddedCassandraService cassandra = new EmbeddedCassandraService();
        cassandra.start();

        // Currently the native server start method return before the server is fully binded to the socket, so we need
        // to wait slightly before trying to connect to it. We should fix this but in the meantime using a sleep.
        Thread.sleep(500);

        cluster = Cluster.builder().addContactPoint("127.0.0.1")
                                   .withPort(DatabaseDescriptor.getNativeTransportPort())
                                   .build();
        session = cluster.connect();

        session.execute(dropKsStatement);
        session.execute(createKsStatement);
    }

    @AfterClass
    public static void tearDown() throws Exception
    {
        cluster.close();
    }

    @Test
    public void testInvalidatePreparedStatementsOnDrop()
    {
        String createTableStatement = "CREATE TABLE IF NOT EXISTS " + KEYSPACE + ".qp_cleanup (id int PRIMARY KEY, cid int, val text);";
        String dropTableStatement = "DROP TABLE IF EXISTS " + KEYSPACE + ".qp_cleanup;";

        session.execute(createTableStatement);

        PreparedStatement prepared = session.prepare("INSERT INTO " + KEYSPACE + ".qp_cleanup (id, cid, val) VALUES (?, ?, ?)");
        PreparedStatement preparedBatch = session.prepare("BEGIN BATCH " +
                                                          "INSERT INTO " + KEYSPACE + ".qp_cleanup (id, cid, val) VALUES (?, ?, ?);" +
                                                          "APPLY BATCH;");
        session.execute(dropTableStatement);
        session.execute(createTableStatement);
        session.execute(prepared.bind(1, 1, "value"));
        session.execute(preparedBatch.bind(2, 2, "value2"));

        session.execute(dropKsStatement);
        session.execute(createKsStatement);
        session.execute(createTableStatement);

        // The driver will get a response about the prepared statement being invalid, causing it to transparently
        // re-prepare the statement.  We'll rely on the fact that we get no errors while executing this to show that
        // the statements have been invalidated.
        session.execute(prepared.bind(1, 1, "value"));
        session.execute(preparedBatch.bind(2, 2, "value2"));
        session.execute(dropKsStatement);
    }

    @Test
    public void testStatementRePreparationOnReconnect()
    {
        session.execute(dropKsStatement);
        session.execute(createKsStatement);

        session.execute("CREATE TABLE IF NOT EXISTS " + KEYSPACE + ".qp_test (id int PRIMARY KEY, cid int, val text);");

        String insertCQL = "INSERT INTO " + KEYSPACE + ".qp_test (id, cid, val) VALUES (?, ?, ?)";
        String selectCQL = "Select * from " + KEYSPACE + ".qp_test where id = ?";

        PreparedStatement preparedInsert = session.prepare(insertCQL);
        PreparedStatement preparedSelect = session.prepare(selectCQL);

        session.execute(preparedInsert.bind(1, 1, "value"));
        assertEquals(1, session.execute(preparedSelect.bind(1)).all().size());

        cluster.close();

        cluster = Cluster.builder().addContactPoint("127.0.0.1")
                                   .withPort(DatabaseDescriptor.getNativeTransportPort())
                                   .build();
        session = cluster.connect();

        preparedInsert = session.prepare(insertCQL);
        preparedSelect = session.prepare(selectCQL);
        session.execute(preparedInsert.bind(1, 1, "value"));

        assertEquals(1, session.execute(preparedSelect.bind(1)).all().size());
    }

    @Test
    public void prepareAndExecuteWithCustomExpressions() throws Throwable
    {
        session.execute(dropKsStatement);
        session.execute(createKsStatement);
        String table = "custom_expr_test";
        String index = "custom_index";

        session.execute(String.format("CREATE TABLE IF NOT EXISTS %s.%s (id int PRIMARY KEY, cid int, val text);",
                                      KEYSPACE, table));
        session.execute(String.format("CREATE CUSTOM INDEX %s ON %s.%s(val) USING '%s'",
                                      index, KEYSPACE, table, StubIndex.class.getName()));
        session.execute(String.format("INSERT INTO %s.%s(id, cid, val) VALUES (0, 0, 'test')", KEYSPACE, table));

        PreparedStatement prepared1 = session.prepare(String.format("SELECT * FROM %s.%s WHERE expr(%s, 'foo')",
                                                                    KEYSPACE, table, index));
        assertEquals(1, session.execute(prepared1.bind()).all().size());

        PreparedStatement prepared2 = session.prepare(String.format("SELECT * FROM %s.%s WHERE expr(%s, ?)",
                                                                    KEYSPACE, table, index));
        assertEquals(1, session.execute(prepared2.bind("foo bar baz")).all().size());

        try
        {
            session.prepare(String.format("SELECT * FROM %s.%s WHERE expr(?, 'foo bar baz')", KEYSPACE, table));
            fail("Expected syntax exception, but none was thrown");
        }
        catch(SyntaxError e)
        {
            assertEquals("Bind variables cannot be used for index names", e.getMessage());
        }
    }
}