eu.stratosphere.example.java.relational.TPCHQuery3 Maven / Gradle / Ivy
/***********************************************************************************************************************
*
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* Licensed 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 eu.stratosphere.example.java.relational;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import eu.stratosphere.api.java.DataSet;
import eu.stratosphere.api.java.ExecutionEnvironment;
import eu.stratosphere.api.java.aggregation.Aggregations;
import eu.stratosphere.api.java.functions.FilterFunction;
import eu.stratosphere.api.java.functions.JoinFunction;
import eu.stratosphere.api.java.tuple.Tuple2;
import eu.stratosphere.api.java.tuple.Tuple3;
import eu.stratosphere.api.java.tuple.Tuple4;
import eu.stratosphere.api.java.tuple.Tuple5;
/**
* This program implements a modified version of the TPC-H query 3. The
* example demonstrates how to assign names to fields by extending the Tuple class.
* The original query can be found at
* http://www.tpc.org/tpch/spec/tpch2.16.0.pdf (page 29).
*
*
* This program implements the following SQL equivalent:
*
*
*
* SELECT
* l_orderkey,
* SUM(l_extendedprice*(1-l_discount)) AS revenue,
* o_orderdate,
* o_shippriority
* FROM customer,
* orders,
* lineitem
* WHERE
* c_mktsegment = '[SEGMENT]'
* AND c_custkey = o_custkey
* AND l_orderkey = o_orderkey
* AND o_orderdate < date '[DATE]'
* AND l_shipdate > date '[DATE]'
* GROUP BY
* l_orderkey,
* o_orderdate,
* o_shippriority;
*
* Compared to the original TPC-H query this version does not sort the result by revenue
* and orderdate.
*
*
* Input files are plain text CSV files using the pipe character ('|') as field separator
* as generated by the TPC-H data generator which is available at http://www.tpc.org/tpch/.
*
*
* This example shows how to use:
*
* - custom data type derived from tuple data types
*
- inline-defined functions
*
- build-in aggregation functions
*
*/
@SuppressWarnings("serial")
public class TPCHQuery3 {
// *************************************************************************
// PROGRAM
// *************************************************************************
public static void main(String[] args) throws Exception {
parseParameters(args);
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
// get input data
DataSet li = getLineitemDataSet(env);
DataSet or = getOrdersDataSet(env);
DataSet cust = getCustomerDataSet(env);
// Filter market segment "AUTOMOBILE"
cust = cust.filter(
new FilterFunction() {
@Override
public boolean filter(Customer value) {
return value.getMktsegment().equals("AUTOMOBILE");
}
});
// Filter all Orders with o_orderdate < 12.03.1995
or = or.filter(
new FilterFunction() {
private DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
private Date date;
{
Calendar cal = Calendar.getInstance();
cal.set(1995, 3, 12);
date = cal.getTime();
}
@Override
public boolean filter(Order value) throws ParseException {
Date orderDate = format.parse(value.getOrderdate());
return orderDate.before(date);
}
});
// Filter all Lineitems with l_shipdate > 12.03.1995
li = li.filter(
new FilterFunction() {
private DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
private Date date;
{
Calendar cal = Calendar.getInstance();
cal.set(1995, 3, 12);
date = cal.getTime();
}
@Override
public boolean filter(Lineitem value) throws ParseException {
Date shipDate = format.parse(value.getShipdate());
return shipDate.after(date);
}
});
// Join customers with orders and package them into a ShippingPriorityItem
DataSet customerWithOrders =
cust.join(or)
.where(0)
.equalTo(0)
.with(
new JoinFunction() {
@Override
public ShippingPriorityItem join(Customer first, Order second) {
return new ShippingPriorityItem(0, 0.0, second.getOrderdate(),
second.getShippriority(), second.getOrderkey());
}
});
// Join the last join result with LineItems
DataSet joined =
customerWithOrders.join(li)
.where(4)
.equalTo(0)
.with(
new JoinFunction() {
@Override
public ShippingPriorityItem join(ShippingPriorityItem first, Lineitem second) {
first.setL_Orderkey(second.getOrderkey());
first.setRevenue(second.getExtendedprice() * (1 - second.getDiscount()));
return first;
}
});
// Group by l_orderkey, o_orderdate and o_shippriority and compute revenue sum
joined = joined
.groupBy(0, 2, 3)
.aggregate(Aggregations.SUM, 1);
// emit result
joined.writeAsCsv(outputPath, "\n", "|");
// execute program
env.execute("TPCH Query 3 Example");
}
// *************************************************************************
// DATA TYPES
// *************************************************************************
public static class Lineitem extends Tuple4 {
public Integer getOrderkey() { return this.f0; }
public Double getDiscount() { return this.f2; }
public Double getExtendedprice() { return this.f1; }
public String getShipdate() { return this.f3; }
}
public static class Customer extends Tuple2 {
public Integer getCustKey() { return this.f0; }
public String getMktsegment() { return this.f1; }
}
public static class Order extends Tuple3 {
public Integer getOrderkey() { return this.f0; }
public String getOrderdate() { return this.f1; }
public Integer getShippriority() { return this.f2; }
}
public static class ShippingPriorityItem extends Tuple5 {
public ShippingPriorityItem() { }
public ShippingPriorityItem(Integer l_orderkey, Double revenue,
String o_orderdate, Integer o_shippriority, Integer o_orderkey) {
this.f0 = l_orderkey;
this.f1 = revenue;
this.f2 = o_orderdate;
this.f3 = o_shippriority;
this.f4 = o_orderkey;
}
public Integer getL_Orderkey() { return this.f0; }
public void setL_Orderkey(Integer l_orderkey) { this.f0 = l_orderkey; }
public Double getRevenue() { return this.f1; }
public void setRevenue(Double revenue) { this.f1 = revenue; }
public String getOrderdate() { return this.f2; }
public Integer getShippriority() { return this.f3; }
public Integer getO_Orderkey() { return this.f4; }
}
// *************************************************************************
// UTIL METHODS
// *************************************************************************
private static String lineitemPath;
private static String customerPath;
private static String ordersPath;
private static String outputPath;
private static void parseParameters(String[] programArguments) {
if(programArguments.length > 0) {
if(programArguments.length == 4) {
lineitemPath = programArguments[0];
customerPath = programArguments[1];
ordersPath = programArguments[2];
outputPath = programArguments[3];
} else {
System.err.println("Usage: TPCHQuery3 ");
System.exit(1);
}
} else {
System.err.println("This program expects data from the TPC-H benchmark as input data.\n" +
" Due to legal restrictions, we can not ship generated data.\n" +
" You can find the TPC-H data generator at http://www.tpc.org/tpch/.\n" +
" Usage: TPCHQuery3 ");
System.exit(1);
}
}
private static DataSet getLineitemDataSet(ExecutionEnvironment env) {
return env.readCsvFile(lineitemPath)
.fieldDelimiter('|')
.includeFields("1000011000100000")
.tupleType(Lineitem.class);
}
private static DataSet getCustomerDataSet(ExecutionEnvironment env) {
return env.readCsvFile(customerPath)
.fieldDelimiter('|')
.includeFields("10000010")
.tupleType(Customer.class);
}
private static DataSet getOrdersDataSet(ExecutionEnvironment env) {
return env.readCsvFile(ordersPath)
.fieldDelimiter('|')
.includeFields("100010010")
.tupleType(Order.class);
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy