/**
* 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.exec;
import org.apache.drill.PlanTestBase;
import org.apache.drill.exec.store.hive.HiveTestDataGenerator;
import org.junit.BeforeClass;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class TestHiveProjectPushDown extends PlanTestBase {
@BeforeClass
public static void generateHive() throws Exception{
new HiveTestDataGenerator().createAndAddHiveTestPlugin(bit.getContext().getStorage());
}
private void testHelper(String query, String expectedColNamesInPlan, int expectedRecordCount)throws Exception {
testPhysicalPlan(query, expectedColNamesInPlan);
int actualRecordCount = testSql(query);
assertEquals(String.format("Received unexepcted number of rows in output: expected=%d, received=%s",
expectedRecordCount, actualRecordCount), expectedRecordCount, actualRecordCount);
}
@Test
public void testSingleColumnProject() throws Exception {
String query = "SELECT `value` as v FROM hive.`default`.kv";
String expectedColNames = " \"columns\" : [ \"`value`\" ]";
testHelper(query, expectedColNames, 5);
}
@Test
public void testMultipleColumnsProject() throws Exception {
String query = "SELECT boolean_field as b_f, tinyint_field as ti_f FROM hive.`default`.readtest";
String expectedColNames = " \"columns\" : [ \"`boolean_field`\", \"`tinyint_field`\" ]";
testHelper(query, expectedColNames, 2);
}
@Test
public void testPartitionColumnProject() throws Exception {
String query = "SELECT double_part as dbl_p FROM hive.`default`.readtest";
String expectedColNames = " \"columns\" : [ \"`double_part`\" ]";
testHelper(query, expectedColNames, 2);
}
@Test
public void testMultiplePartitionColumnsProject() throws Exception {
String query = "SELECT double_part as dbl_p, decimal_part as dec_p FROM hive.`default`.readtest";
String expectedColNames = " \"columns\" : [ \"`double_part`\", \"`decimal_part`\" ]";
testHelper(query, expectedColNames, 2);
}
@Test
public void testPartitionAndRegularColumnProjectColumn() throws Exception {
String query = "SELECT boolean_field as b_f, tinyint_field as ti_f, " +
"double_part as dbl_p, decimal_part as dec_p FROM hive.`default`.readtest";
String expectedColNames = " \"columns\" : [ \"`boolean_field`\", \"`tinyint_field`\", " +
"\"`double_part`\", \"`decimal_part`\" ]";
testHelper(query, expectedColNames, 2);
}
@Test
public void testStarProject() throws Exception {
String query = "SELECT * FROM hive.`default`.kv";
String expectedColNames = " \"columns\" : [ \"`key`\", \"`value`\" ]";
testHelper(query, expectedColNames, 5);
}
}