eu.stratosphere.example.java.relational

Class RelationalQuery

java.lang.Object

eu.stratosphere.example.java.relational.RelationalQuery

public class RelationalQuery
extends Object

This program implements the following relational query on the TPC-H data set.

 SELECT l_orderkey, o_shippriority, sum(l_extendedprice) as revenue
   FROM orders, lineitem
   WHERE l_orderkey = o_orderkey
     AND o_orderstatus = "X"
     AND YEAR(o_orderdate) > Y
     AND o_orderpriority LIKE "Z%"
   GROUP BY l_orderkey, o_shippriority;
 

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/.

Usage: RelationalQuery <orders-csv path> <lineitem-csv path> <result path>

This example shows how to use:

• tuple data types
• inline-defined functions
• projection and join projection
• build-in aggregation functions

Constructor Summary

Constructors

Constructor and Description
RelationalQuery()

Method Summary

Modifier and Type	Method and Description
static void	main(String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RelationalQuery

public RelationalQuery()

Method Detail

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception