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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
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package org.apache.hcatalog.hbase;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
import org.apache.hadoop.hbase.mapreduce.TableInputFormat;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hive.cli.CliSessionState;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.metastore.MetaStoreUtils;
import org.apache.hadoop.hive.ql.processors.CommandProcessorResponse;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.mapred.RunningJob;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.Mapper;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hcatalog.cli.HCatDriver;
import org.apache.hcatalog.cli.SemanticAnalysis.HCatSemanticAnalyzer;
import org.apache.hcatalog.common.HCatConstants;
import org.apache.hcatalog.common.HCatException;
import org.apache.hcatalog.common.HCatUtil;
import org.apache.hcatalog.data.HCatRecord;
import org.apache.hcatalog.data.schema.HCatFieldSchema;
import org.apache.hcatalog.data.schema.HCatSchema;
import org.apache.hcatalog.hbase.snapshot.RevisionManager;
import org.apache.hcatalog.hbase.snapshot.RevisionManagerConfiguration;
import org.apache.hcatalog.hbase.snapshot.Transaction;
import org.apache.hcatalog.mapreduce.HCatInputFormat;
import org.apache.hcatalog.mapreduce.InputJobInfo;
import org.apache.hcatalog.mapreduce.PartInfo;
import org.junit.Test;
public class TestHBaseInputFormat extends SkeletonHBaseTest {
private static HiveConf hcatConf;
private static HCatDriver hcatDriver;
private final byte[] FAMILY = Bytes.toBytes("testFamily");
private final byte[] QUALIFIER1 = Bytes.toBytes("testQualifier1");
private final byte[] QUALIFIER2 = Bytes.toBytes("testQualifier2");
public TestHBaseInputFormat() throws Exception {
hcatConf = getHiveConf();
hcatConf.set(ConfVars.SEMANTIC_ANALYZER_HOOK.varname,
HCatSemanticAnalyzer.class.getName());
URI fsuri = getFileSystem().getUri();
Path whPath = new Path(fsuri.getScheme(), fsuri.getAuthority(),
getTestDir());
hcatConf.set(HiveConf.ConfVars.HADOOPFS.varname, fsuri.toString());
hcatConf.set(ConfVars.METASTOREWAREHOUSE.varname, whPath.toString());
//Add hbase properties
for (Map.Entry<String, String> el : getHbaseConf()) {
if (el.getKey().startsWith("hbase.")) {
hcatConf.set(el.getKey(), el.getValue());
}
}
HBaseConfiguration.merge(hcatConf,
RevisionManagerConfiguration.create());
SessionState.start(new CliSessionState(hcatConf));
hcatDriver = new HCatDriver();
}
private List<Put> generatePuts(int num, String tableName) throws IOException {
List<String> columnFamilies = Arrays.asList("testFamily");
RevisionManager rm = null;
List<Put> myPuts;
try {
rm = HBaseRevisionManagerUtil.getOpenedRevisionManager(hcatConf);
rm.open();
myPuts = new ArrayList<Put>();
for (int i = 1; i <= num; i++) {
Put put = new Put(Bytes.toBytes("testRow"));
put.add(FAMILY, QUALIFIER1, i, Bytes.toBytes("textValue-" + i));
put.add(FAMILY, QUALIFIER2, i, Bytes.toBytes("textValue-" + i));
myPuts.add(put);
Transaction tsx = rm.beginWriteTransaction(tableName,
columnFamilies);
rm.commitWriteTransaction(tsx);
}
} finally {
if (rm != null)
rm.close();
}
return myPuts;
}
private void populateHBaseTable(String tName, int revisions) throws IOException {
List<Put> myPuts = generatePuts(revisions, tName);
HTable table = new HTable(getHbaseConf(), Bytes.toBytes(tName));
table.put(myPuts);
}
private long populateHBaseTableQualifier1(String tName, int value, Boolean commit)
throws IOException {
List<String> columnFamilies = Arrays.asList("testFamily");
RevisionManager rm = null;
List<Put> myPuts = new ArrayList<Put>();
long revision;
try {
rm = HBaseRevisionManagerUtil.getOpenedRevisionManager(hcatConf);
rm.open();
Transaction tsx = rm.beginWriteTransaction(tName, columnFamilies);
Put put = new Put(Bytes.toBytes("testRow"));
revision = tsx.getRevisionNumber();
put.add(FAMILY, QUALIFIER1, revision,
Bytes.toBytes("textValue-" + value));
myPuts.add(put);
// If commit is null it is left as a running transaction
if (commit != null) {
if (commit) {
rm.commitWriteTransaction(tsx);
} else {
rm.abortWriteTransaction(tsx);
}
}
} finally {
if (rm != null)
rm.close();
}
HTable table = new HTable(getHbaseConf(), Bytes.toBytes(tName));
table.put(myPuts);
return revision;
}
@Test
public void TestHBaseTableReadMR() throws Exception {
String tableName = newTableName("MyTable");
String databaseName = newTableName("MyDatabase");
//Table name will be lower case unless specified by hbase.table.name property
String hbaseTableName = (databaseName + "." + tableName).toLowerCase();
String db_dir = getTestDir() + "/hbasedb";
String dbquery = "CREATE DATABASE IF NOT EXISTS " + databaseName + " LOCATION '"
+ db_dir + "'";
String tableQuery = "CREATE TABLE " + databaseName + "." + tableName
+ "(key string, testqualifier1 string, testqualifier2 string) STORED BY " +
"'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
+ "TBLPROPERTIES ('hbase.columns.mapping'=':key,testFamily:testQualifier1,testFamily:testQualifier2')";
CommandProcessorResponse responseOne = hcatDriver.run(dbquery);
assertEquals(0, responseOne.getResponseCode());
CommandProcessorResponse responseTwo = hcatDriver.run(tableQuery);
assertEquals(0, responseTwo.getResponseCode());
HBaseAdmin hAdmin = new HBaseAdmin(getHbaseConf());
boolean doesTableExist = hAdmin.tableExists(hbaseTableName);
assertTrue(doesTableExist);
populateHBaseTable(hbaseTableName, 5);
Configuration conf = new Configuration(hcatConf);
conf.set(HCatConstants.HCAT_KEY_HIVE_CONF,
HCatUtil.serialize(getHiveConf().getAllProperties()));
// output settings
Path outputDir = new Path(getTestDir(), "mapred/testHbaseTableMRRead");
FileSystem fs = getFileSystem();
if (fs.exists(outputDir)) {
fs.delete(outputDir, true);
}
// create job
Job job = new Job(conf, "hbase-mr-read-test");
job.setJarByClass(this.getClass());
job.setMapperClass(MapReadHTable.class);
MapReadHTable.resetCounters();
job.setInputFormatClass(HCatInputFormat.class);
HCatInputFormat.setInput(job.getConfiguration(), databaseName, tableName);
job.setOutputFormatClass(TextOutputFormat.class);
TextOutputFormat.setOutputPath(job, outputDir);
job.setMapOutputKeyClass(BytesWritable.class);
job.setMapOutputValueClass(Text.class);
job.setOutputKeyClass(BytesWritable.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks(0);
assertTrue(job.waitForCompletion(true));
// Note: These asserts only works in case of LocalJobRunner as they run in same jvm.
// If using MiniMRCluster, the tests will have to be modified.
assertFalse(MapReadHTable.error);
assertEquals(MapReadHTable.count, 1);
String dropTableQuery = "DROP TABLE " + hbaseTableName;
CommandProcessorResponse responseThree = hcatDriver.run(dropTableQuery);
assertEquals(0, responseThree.getResponseCode());
boolean isHbaseTableThere = hAdmin.tableExists(hbaseTableName);
assertFalse(isHbaseTableThere);
String dropDB = "DROP DATABASE " + databaseName;
CommandProcessorResponse responseFour = hcatDriver.run(dropDB);
assertEquals(0, responseFour.getResponseCode());
}
@Test
public void TestHBaseTableProjectionReadMR() throws Exception {
String tableName = newTableName("MyTable");
//Table name as specified by hbase.table.name property
String hbaseTableName = "MyDB_" + tableName;
String tableQuery = "CREATE TABLE " + tableName
+ "(key string, testqualifier1 string, testqualifier2 string) STORED BY "
+ "'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
+ "TBLPROPERTIES ('hbase.columns.mapping'="
+ "':key,testFamily:testQualifier1,testFamily:testQualifier2',"
+ "'hbase.table.name'='" + hbaseTableName + "')";
CommandProcessorResponse responseTwo = hcatDriver.run(tableQuery);
assertEquals(0, responseTwo.getResponseCode());
HBaseAdmin hAdmin = new HBaseAdmin(getHbaseConf());
boolean doesTableExist = hAdmin.tableExists(hbaseTableName);
assertTrue(doesTableExist);
populateHBaseTable(hbaseTableName, 5);
Configuration conf = new Configuration(hcatConf);
conf.set(HCatConstants.HCAT_KEY_HIVE_CONF,
HCatUtil.serialize(getHiveConf().getAllProperties()));
// output settings
Path outputDir = new Path(getTestDir(), "mapred/testHBaseTableProjectionReadMR");
FileSystem fs = getFileSystem();
if (fs.exists(outputDir)) {
fs.delete(outputDir, true);
}
// create job
Job job = new Job(conf, "hbase-column-projection");
job.setJarByClass(this.getClass());
job.setMapperClass(MapReadProjHTable.class);
job.setInputFormatClass(HCatInputFormat.class);
HCatInputFormat.setOutputSchema(job, getProjectionSchema());
HCatInputFormat.setInput(job, MetaStoreUtils.DEFAULT_DATABASE_NAME, tableName);
job.setOutputFormatClass(TextOutputFormat.class);
TextOutputFormat.setOutputPath(job, outputDir);
job.setMapOutputKeyClass(BytesWritable.class);
job.setMapOutputValueClass(Text.class);
job.setOutputKeyClass(BytesWritable.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks(0);
assertTrue(job.waitForCompletion(true));
assertFalse(MapReadProjHTable.error);
assertEquals(MapReadProjHTable.count, 1);
String dropTableQuery = "DROP TABLE " + tableName;
CommandProcessorResponse responseThree = hcatDriver.run(dropTableQuery);
assertEquals(0, responseThree.getResponseCode());
boolean isHbaseTableThere = hAdmin.tableExists(hbaseTableName);
assertFalse(isHbaseTableThere);
}
@Test
public void TestHBaseInputFormatProjectionReadMR() throws Exception {
String tableName = newTableName("mytable");
String tableQuery = "CREATE TABLE " + tableName
+ "(key string, testqualifier1 string, testqualifier2 string) STORED BY " +
"'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
+ "TBLPROPERTIES ('hbase.columns.mapping'=':key," +
"testFamily:testQualifier1,testFamily:testQualifier2')";
CommandProcessorResponse responseTwo = hcatDriver.run(tableQuery);
assertEquals(0, responseTwo.getResponseCode());
HBaseAdmin hAdmin = new HBaseAdmin(getHbaseConf());
boolean doesTableExist = hAdmin.tableExists(tableName);
assertTrue(doesTableExist);
populateHBaseTable(tableName, 5);
Configuration conf = new Configuration(hcatConf);
conf.set(HCatConstants.HCAT_KEY_HIVE_CONF,
HCatUtil.serialize(getHiveConf().getAllProperties()));
// output settings
Path outputDir = new Path(getTestDir(), "mapred/testHBaseTableProjectionReadMR");
FileSystem fs = getFileSystem();
if (fs.exists(outputDir)) {
fs.delete(outputDir, true);
}
// create job
JobConf job = new JobConf(conf);
job.setJobName("hbase-scan-column");
job.setJarByClass(this.getClass());
job.setMapperClass(MapReadProjectionHTable.class);
job.setInputFormat(HBaseInputFormat.class);
//Configure projection schema
job.set(HCatConstants.HCAT_KEY_OUTPUT_SCHEMA, HCatUtil.serialize(getProjectionSchema()));
Job newJob = new Job(job);
HCatInputFormat.setInput(newJob, MetaStoreUtils.DEFAULT_DATABASE_NAME, tableName);
String inputJobString = newJob.getConfiguration().get(HCatConstants.HCAT_KEY_JOB_INFO);
InputJobInfo info = (InputJobInfo) HCatUtil.deserialize(inputJobString);
job.set(HCatConstants.HCAT_KEY_JOB_INFO, inputJobString);
for (PartInfo partinfo : info.getPartitions()) {
for (Entry<String, String> entry : partinfo.getJobProperties().entrySet())
job.set(entry.getKey(), entry.getValue());
}
assertEquals("testFamily:testQualifier1", job.get(TableInputFormat.SCAN_COLUMNS));
job.setOutputFormat(org.apache.hadoop.mapred.TextOutputFormat.class);
org.apache.hadoop.mapred.TextOutputFormat.setOutputPath(job, outputDir);
job.setMapOutputKeyClass(BytesWritable.class);
job.setMapOutputValueClass(Text.class);
job.setOutputKeyClass(BytesWritable.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks(0);
RunningJob runJob = JobClient.runJob(job);
runJob.waitForCompletion();
assertTrue(runJob.isSuccessful());
assertFalse(MapReadProjHTable.error);
assertEquals(MapReadProjHTable.count, 1);
String dropTableQuery = "DROP TABLE " + tableName;
CommandProcessorResponse responseThree = hcatDriver.run(dropTableQuery);
assertEquals(0, responseThree.getResponseCode());
boolean isHbaseTableThere = hAdmin.tableExists(tableName);
assertFalse(isHbaseTableThere);
}
@Test
public void TestHBaseTableIgnoreAbortedTransactions() throws Exception {
String tableName = newTableName("mytable");
String tableQuery = "CREATE TABLE " + tableName
+ "(key string, testqualifier1 string, testqualifier2 string) STORED BY " +
"'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
+ "TBLPROPERTIES ('hbase.columns.mapping'=':key," +
"testFamily:testQualifier1,testFamily:testQualifier2')";
CommandProcessorResponse responseTwo = hcatDriver.run(tableQuery);
assertEquals(0, responseTwo.getResponseCode());
HBaseAdmin hAdmin = new HBaseAdmin(getHbaseConf());
boolean doesTableExist = hAdmin.tableExists(tableName);
assertTrue(doesTableExist);
populateHBaseTable(tableName, 5);
populateHBaseTableQualifier1(tableName, 6, false);
populateHBaseTableQualifier1(tableName, 7, false);
Configuration conf = new Configuration(hcatConf);
conf.set(HCatConstants.HCAT_KEY_HIVE_CONF,
HCatUtil.serialize(getHiveConf().getAllProperties()));
Path outputDir = new Path(getTestDir(), "mapred/testHBaseTableIgnoreAbortedTransactions");
FileSystem fs = getFileSystem();
if (fs.exists(outputDir)) {
fs.delete(outputDir, true);
}
Job job = new Job(conf, "hbase-aborted-transaction");
job.setJarByClass(this.getClass());
job.setMapperClass(MapReadHTable.class);
MapReadHTable.resetCounters();
job.setInputFormatClass(HCatInputFormat.class);
HCatInputFormat.setInput(job, MetaStoreUtils.DEFAULT_DATABASE_NAME, tableName);
job.setOutputFormatClass(TextOutputFormat.class);
TextOutputFormat.setOutputPath(job, outputDir);
job.setMapOutputKeyClass(BytesWritable.class);
job.setMapOutputValueClass(Text.class);
job.setOutputKeyClass(BytesWritable.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks(0);
assertTrue(job.waitForCompletion(true));
// Verify that the records do not contain aborted transaction
// revisions 6 and 7 for testFamily:testQualifier1 and
// fetches revision 5 for both testQualifier1 and testQualifier2
assertFalse(MapReadHTable.error);
assertEquals(1, MapReadHTable.count);
String dropTableQuery = "DROP TABLE " + tableName;
CommandProcessorResponse responseThree = hcatDriver.run(dropTableQuery);
assertEquals(0, responseThree.getResponseCode());
boolean isHbaseTableThere = hAdmin.tableExists(tableName);
assertFalse(isHbaseTableThere);
}
@Test
public void TestHBaseTableIgnoreAbortedAndRunningTransactions() throws Exception {
String tableName = newTableName("mytable");
String tableQuery = "CREATE TABLE " + tableName
+ "(key string, testqualifier1 string, testqualifier2 string) STORED BY " +
"'org.apache.hcatalog.hbase.HBaseHCatStorageHandler'"
+ "TBLPROPERTIES ('hbase.columns.mapping'=':key," +
"testFamily:testQualifier1,testFamily:testQualifier2')";
CommandProcessorResponse responseTwo = hcatDriver.run(tableQuery);
assertEquals(0, responseTwo.getResponseCode());
HBaseAdmin hAdmin = new HBaseAdmin(getHbaseConf());
boolean doesTableExist = hAdmin.tableExists(tableName);
assertTrue(doesTableExist);
populateHBaseTable(tableName, 2);
populateHBaseTableQualifier1(tableName, 3, Boolean.TRUE); //Committed transaction
populateHBaseTableQualifier1(tableName, 4, null); //Running transaction
populateHBaseTableQualifier1(tableName, 5, Boolean.FALSE); //Aborted transaction
populateHBaseTableQualifier1(tableName, 6, Boolean.TRUE); //Committed transaction
populateHBaseTableQualifier1(tableName, 7, null); //Running Transaction
populateHBaseTableQualifier1(tableName, 8, Boolean.FALSE); //Aborted Transaction
Configuration conf = new Configuration(hcatConf);
conf.set(HCatConstants.HCAT_KEY_HIVE_CONF,
HCatUtil.serialize(getHiveConf().getAllProperties()));
Path outputDir = new Path(getTestDir(), "mapred/testHBaseTableIgnoreAbortedTransactions");
FileSystem fs = getFileSystem();
if (fs.exists(outputDir)) {
fs.delete(outputDir, true);
}
Job job = new Job(conf, "hbase-running-aborted-transaction");
job.setJarByClass(this.getClass());
job.setMapperClass(MapReadHTableRunningAbort.class);
job.setInputFormatClass(HCatInputFormat.class);
HCatInputFormat.setInput(job, MetaStoreUtils.DEFAULT_DATABASE_NAME, tableName);
job.setOutputFormatClass(TextOutputFormat.class);
TextOutputFormat.setOutputPath(job, outputDir);
job.setMapOutputKeyClass(BytesWritable.class);
job.setMapOutputValueClass(Text.class);
job.setOutputKeyClass(BytesWritable.class);
job.setOutputValueClass(Text.class);
job.setNumReduceTasks(0);
assertTrue(job.waitForCompletion(true));
// Verify that the records do not contain running and aborted transaction
// and it fetches revision 2 for testQualifier1 and testQualifier2
assertFalse(MapReadHTableRunningAbort.error);
assertEquals(1, MapReadHTableRunningAbort.count);
String dropTableQuery = "DROP TABLE " + tableName;
CommandProcessorResponse responseThree = hcatDriver.run(dropTableQuery);
assertEquals(0, responseThree.getResponseCode());
boolean isHbaseTableThere = hAdmin.tableExists(tableName);
assertFalse(isHbaseTableThere);
}
static class MapReadHTable
extends
Mapper<ImmutableBytesWritable, HCatRecord, WritableComparable<?>, Text> {
static boolean error = false;
static int count = 0;
@Override
public void map(ImmutableBytesWritable key, HCatRecord value,
Context context) throws IOException, InterruptedException {
System.out.println("HCat record value" + value.toString());
boolean correctValues = (value.size() == 3)
&& (value.get(0).toString()).equalsIgnoreCase("testRow")
&& (value.get(1).toString()).equalsIgnoreCase("textValue-5")
&& (value.get(2).toString()).equalsIgnoreCase("textValue-5");
if (correctValues == false) {
error = true;
}
count++;
}
public static void resetCounters() {
error = false;
count = 0;
}
}
static class MapReadProjHTable
extends
Mapper<ImmutableBytesWritable, HCatRecord, WritableComparable<?>, Text> {
static boolean error = false;
static int count = 0;
@Override
public void map(ImmutableBytesWritable key, HCatRecord value,
Context context) throws IOException, InterruptedException {
System.out.println("HCat record value" + value.toString());
boolean correctValues = (value.size() == 2)
&& (value.get(0).toString()).equalsIgnoreCase("testRow")
&& (value.get(1).toString()).equalsIgnoreCase("textValue-5");
if (correctValues == false) {
error = true;
}
count++;
}
}
static class MapReadProjectionHTable
implements org.apache.hadoop.mapred.Mapper<ImmutableBytesWritable, Result, WritableComparable<?>, Text> {
static boolean error = false;
static int count = 0;
@Override
public void configure(JobConf job) {
}
@Override
public void close() throws IOException {
}
@Override
public void map(ImmutableBytesWritable key, Result result,
OutputCollector<WritableComparable<?>, Text> output, Reporter reporter)
throws IOException {
System.out.println("Result " + result.toString());
List<KeyValue> list = result.list();
boolean correctValues = (list.size() == 1)
&& (Bytes.toString(list.get(0).getRow())).equalsIgnoreCase("testRow")
&& (Bytes.toString(list.get(0).getValue())).equalsIgnoreCase("textValue-5")
&& (Bytes.toString(list.get(0).getFamily())).equalsIgnoreCase("testFamily")
&& (Bytes.toString(list.get(0).getQualifier())).equalsIgnoreCase("testQualifier1");
if (correctValues == false) {
error = true;
}
count++;
}
}
static class MapReadHTableRunningAbort
extends
Mapper<ImmutableBytesWritable, HCatRecord, WritableComparable<?>, Text> {
static boolean error = false;
static int count = 0;
@Override
public void map(ImmutableBytesWritable key, HCatRecord value,
Context context) throws IOException, InterruptedException {
System.out.println("HCat record value" + value.toString());
boolean correctValues = (value.size() == 3)
&& (value.get(0).toString()).equalsIgnoreCase("testRow")
&& (value.get(1).toString()).equalsIgnoreCase("textValue-3")
&& (value.get(2).toString()).equalsIgnoreCase("textValue-2");
if (correctValues == false) {
error = true;
}
count++;
}
}
private HCatSchema getProjectionSchema() throws HCatException {
HCatSchema schema = new HCatSchema(new ArrayList<HCatFieldSchema>());
schema.append(new HCatFieldSchema("key", HCatFieldSchema.Type.STRING,
""));
schema.append(new HCatFieldSchema("testqualifier1",
HCatFieldSchema.Type.STRING, ""));
return schema;
}
}