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/*
* 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 static org.junit.Assert.assertEquals;
import org.apache.drill.categories.HiveStorageTest;
import org.apache.drill.exec.hive.HiveTestBase;
import org.apache.drill.exec.planner.physical.PlannerSettings;
import org.apache.drill.categories.SlowTest;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
@Category({SlowTest.class, HiveStorageTest.class})
public class TestHiveProjectPushDown extends HiveTestBase {
// enable decimal data type
@BeforeClass
public static void enableDecimalDataType() throws Exception {
test(String.format("alter session set `%s` = true", PlannerSettings.ENABLE_DECIMAL_DATA_TYPE_KEY));
}
@AfterClass
public static void disableDecimalDataType() throws Exception {
test(String.format("alter session set `%s` = false", PlannerSettings.ENABLE_DECIMAL_DATA_TYPE_KEY));
}
private void testHelper(String query, int expectedRecordCount, String... expectedSubstrs)throws Exception {
testPhysicalPlan(query, expectedSubstrs);
int actualRecordCount = testSql(query);
assertEquals(String.format("Received unexpected 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, 5, expectedColNames);
}
@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, 2, expectedColNames);
}
@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, 2, expectedColNames);
}
@Test
public void testMultiplePartitionColumnsProject() throws Exception {
String query = "SELECT double_part as dbl_p, decimal0_part as dec_p FROM hive.`default`.readtest";
String expectedColNames = " \"columns\" : [ \"`double_part`\", \"`decimal0_part`\" ]";
testHelper(query, 2, expectedColNames);
}
@Test
public void testPartitionAndRegularColumnProjectColumn() throws Exception {
String query = "SELECT boolean_field as b_f, tinyint_field as ti_f, " +
"double_part as dbl_p, decimal0_part as dec_p FROM hive.`default`.readtest";
String expectedColNames = " \"columns\" : [ \"`boolean_field`\", \"`tinyint_field`\", " +
"\"`double_part`\", \"`decimal0_part`\" ]";
testHelper(query, 2, expectedColNames);
}
@Test
public void testStarProject() throws Exception {
String query = "SELECT * FROM hive.`default`.kv";
String expectedColNames = " \"columns\" : [ \"`key`\", \"`value`\" ]";
testHelper(query, 5, expectedColNames);
}
@Test
public void testHiveCountStar() throws Exception {
String query = "SELECT count(*) as cnt FROM hive.`default`.kv";
String expectedColNames = "\"columns\" : [ ]";
testHelper(query, 1, expectedColNames);
}
}
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