/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.drill.jdbc;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.core.StringContains.containsString;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.apache.drill.exec.ExecConstants;
import org.apache.drill.jdbc.test.JdbcAssert;
import org.apache.drill.test.DrillTest;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
public class DrillResultSetTest extends DrillTest {
// TODO: Move Jetty status server disabling to DrillTest.
private static final String STATUS_SERVER_PROPERTY_NAME =
ExecConstants.HTTP_ENABLE;
private static final String origStatusServerPropValue =
System.getProperty( STATUS_SERVER_PROPERTY_NAME, "true" );
// Disable Jetty status server so unit tests run (outside Maven setup).
// (TODO: Move this to base test class and/or have Jetty try other ports.)
@BeforeClass
public static void setUpClass() {
System.setProperty( STATUS_SERVER_PROPERTY_NAME, "false" );
}
@AfterClass
public static void tearDownClass() {
System.setProperty( STATUS_SERVER_PROPERTY_NAME, origStatusServerPropValue );
}
@Test
public void test_next_blocksFurtherAccessAfterEnd()
throws SQLException
{
Connection connection =
new Driver().connect( "jdbc:drill:zk=local", JdbcAssert.getDefaultProperties() );
Statement statement = connection.createStatement();
ResultSet resultSet =
statement.executeQuery( "SELECT 1 AS x \n" +
"FROM cp.`donuts.json` \n" +
"LIMIT 2" );
// Advance to first row; confirm can access data.
assertThat( resultSet.next(), is( true ) );
assertThat( resultSet.getInt( 1 ), is ( 1 ) );
// Advance from first to second (last) row, confirming data access.
assertThat( resultSet.next(), is( true ) );
assertThat( resultSet.getInt( 1 ), is ( 1 ) );
// Now advance past last row.
assertThat( resultSet.next(), is( false ) );
// Main check: That row data access methods now throw SQLException.
try {
resultSet.getInt( 1 );
fail( "Didn't get expected SQLException." );
}
catch ( SQLException e ) {
// Expect something like current InvalidCursorStateSqlException saying
// "Result set cursor is already positioned past all rows."
assertThat( e, instanceOf( InvalidCursorStateSqlException.class ) );
assertThat( e.toString(), containsString( "past" ) );
}
// (Any other exception is unexpected result.)
assertThat( resultSet.next(), is( false ) );
// TODO: Ideally, test all other accessor methods.
}
@Test
public void test_next_blocksFurtherAccessWhenNoRows()
throws Exception
{
Connection connection =
new Driver().connect( "jdbc:drill:zk=local", JdbcAssert.getDefaultProperties() );
Statement statement = connection.createStatement();
ResultSet resultSet =
statement.executeQuery( "SELECT 'Hi' AS x \n" +
"FROM cp.`donuts.json` \n" +
"WHERE false" );
// Do initial next(). (Advance from before results to next possible
// position (after the set of zero rows).
assertThat( resultSet.next(), is( false ) );
// Main check: That row data access methods throw SQLException.
try {
resultSet.getString( 1 );
fail( "Didn't get expected SQLException." );
}
catch ( SQLException e ) {
// Expect something like current InvalidRowSQLException saying
// "Result set cursor is already positioned past all rows."
assertThat( e, instanceOf( InvalidCursorStateSqlException.class ) );
assertThat( e.toString(), containsString( "past" ) );
assertThat( e.toString(), containsString( "rows" ) );
}
// (Any non-SQLException exception is unexpected result.)
assertThat( resultSet.next(), is( false ) );
// TODO: Ideally, test all other accessor methods.
}
@Test
public void test_getRow_isOneBased()
throws Exception
{
Connection connection =
new Driver().connect( "jdbc:drill:zk=local", JdbcAssert.getDefaultProperties() );
Statement statement = connection.createStatement();
ResultSet resultSet =
statement.executeQuery( "VALUES (1), (2)" );
// Expect 0 when before first row:
assertThat( "getRow() before first next()", resultSet.getRow(), equalTo( 0 ) );
resultSet.next();
// Expect 1 at first row:
assertThat( "getRow() at first row", resultSet.getRow(), equalTo( 1 ) );
resultSet.next();
// Expect 2 at second row:
assertThat( "getRow() at second row", resultSet.getRow(), equalTo( 2 ) );
resultSet.next();
// Expect 0 again when after last row:
assertThat( "getRow() after last row", resultSet.getRow(), equalTo( 0 ) );
resultSet.next();
assertThat( "getRow() after last row", resultSet.getRow(), equalTo( 0 ) );
}
// TODO: Ideally, test other methods.
}