/**
* 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.hadoop.hive.ql.parse;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import junit.framework.Assert;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.CommandNeedRetryException;
import org.apache.hadoop.hive.ql.Driver;
import org.apache.hadoop.hive.ql.QueryPlan;
import org.apache.hadoop.hive.ql.hooks.ReadEntity;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
public class TestColumnAccess {
@BeforeClass
public static void Setup() throws CommandNeedRetryException {
Driver driver = createDriver();
int ret = driver.run("create table t1(id1 int, name1 string)").getResponseCode();
Assert.assertEquals("Checking command success", 0, ret);
ret = driver.run("create table t2(id2 int, id1 int, name2 string)").getResponseCode();
Assert.assertEquals("Checking command success", 0, ret);
ret = driver.run("create view v1 as select * from t1").getResponseCode();
Assert.assertEquals("Checking command success", 0, ret);
}
@AfterClass
public static void Teardown() throws Exception {
Driver driver = createDriver();
driver.run("drop table t1");
driver.run("drop table t2");
driver.run("drop view v1");
}
@Test
public void testQueryTable1() throws ParseException {
String query = "select * from t1";
Driver driver = createDriver();
int rc = driver.compile(query);
Assert.assertEquals("Checking command success", 0, rc);
QueryPlan plan = driver.getPlan();
// check access columns from ColumnAccessInfo
ColumnAccessInfo columnAccessInfo = plan.getColumnAccessInfo();
List<String> cols = columnAccessInfo.getTableToColumnAccessMap().get("default@t1");
Assert.assertNotNull(cols);
Assert.assertEquals(2, cols.size());
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
// check access columns from readEntity
Map<String, List<String>> tableColsMap = getColsFromReadEntity(plan.getInputs());
cols = tableColsMap.get("default@t1");
Assert.assertNotNull(cols);
Assert.assertEquals(2, cols.size());
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
}
@Test
public void testJoinTable1AndTable2() throws ParseException {
String query = "select * from t1 join t2 on (t1.id1 = t2.id1)";
Driver driver = createDriver();
int rc = driver.compile(query);
Assert.assertEquals("Checking command success", 0, rc);
QueryPlan plan = driver.getPlan();
// check access columns from ColumnAccessInfo
ColumnAccessInfo columnAccessInfo = plan.getColumnAccessInfo();
List<String> cols = columnAccessInfo.getTableToColumnAccessMap().get("default@t1");
Assert.assertNotNull(cols);
Assert.assertEquals(2, cols.size());
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
cols = columnAccessInfo.getTableToColumnAccessMap().get("default@t2");
Assert.assertNotNull(cols);
Assert.assertEquals(3, cols.size());
Assert.assertNotNull(cols.contains("id2"));
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
// check access columns from readEntity
Map<String, List<String>> tableColsMap = getColsFromReadEntity(plan.getInputs());
cols = tableColsMap.get("default@t1");
Assert.assertNotNull(cols);
Assert.assertEquals(2, cols.size());
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
cols = tableColsMap.get("default@t2");
Assert.assertNotNull(cols);
Assert.assertEquals(3, cols.size());
Assert.assertNotNull(cols.contains("id2"));
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
}
@Test
public void testJoinView1AndTable2() throws ParseException {
String query = "select * from v1 join t2 on (v1.id1 = t2.id1)";
Driver driver = createDriver();
int rc = driver.compile(query);
Assert.assertEquals("Checking command success", 0, rc);
QueryPlan plan = driver.getPlan();
// check access columns from ColumnAccessInfo
ColumnAccessInfo columnAccessInfo = plan.getColumnAccessInfo();
List<String> cols = columnAccessInfo.getTableToColumnAccessMap().get("default@v1");
Assert.assertNull(cols);
cols = columnAccessInfo.getTableToColumnAccessMap().get("default@t1");
Assert.assertNotNull(cols);
Assert.assertEquals(2, cols.size());
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
cols = columnAccessInfo.getTableToColumnAccessMap().get("default@t2");
Assert.assertNotNull(cols);
Assert.assertEquals(3, cols.size());
Assert.assertNotNull(cols.contains("id2"));
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
// check access columns from readEntity
Map<String, List<String>> tableColsMap = getColsFromReadEntity(plan.getInputs());
cols = tableColsMap.get("default@v1");
Assert.assertNull(cols);
cols = tableColsMap.get("default@t1");
Assert.assertNotNull(cols);
Assert.assertEquals(2, cols.size());
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
cols = tableColsMap.get("default@t2");
Assert.assertNotNull(cols);
Assert.assertEquals(3, cols.size());
Assert.assertNotNull(cols.contains("id2"));
Assert.assertNotNull(cols.contains("id1"));
Assert.assertNotNull(cols.contains("name1"));
}
private Map<String, List<String>> getColsFromReadEntity(HashSet<ReadEntity> inputs) {
Map<String, List<String>> tableColsMap = new HashMap<String, List<String>>();
for(ReadEntity entity: inputs) {
switch (entity.getType()) {
case TABLE:
if (entity.getAccessedColumns() != null && !entity.getAccessedColumns().isEmpty()) {
tableColsMap.put(entity.getTable().getCompleteName(), entity.getAccessedColumns());
}
break;
case PARTITION:
if (entity.getAccessedColumns() != null && !entity.getAccessedColumns().isEmpty()) {
tableColsMap.put(entity.getPartition().getTable().getCompleteName(),
entity.getAccessedColumns());
}
break;
default:
// no-op
}
}
return tableColsMap;
}
private static Driver createDriver() {
HiveConf conf = new HiveConf(Driver.class);
HiveConf.setBoolVar(conf, HiveConf.ConfVars.HIVE_SUPPORT_CONCURRENCY, false);
conf.setBoolVar(HiveConf.ConfVars.HIVE_STATS_COLLECT_SCANCOLS, true);
SessionState.start(conf);
Driver driver = new Driver(conf);
driver.init();
return driver;
}
}