/*
* 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.flink.test.recordJobs.relational.query9Util;
import org.apache.flink.api.java.record.functions.MapFunction;
import org.apache.flink.test.recordJobs.util.Tuple;
import org.apache.flink.types.Record;
import org.apache.flink.util.Collector;
@SuppressWarnings("serial")
public class LineItemMap extends MapFunction {
/**
* Filter "lineitem".
*
* Output Schema:
* Key: orderkey
* Value: (partkey, suppkey, quantity, price)
*
*/
@Override
public void map(Record record, Collector<Record> out) throws Exception
{
Tuple inputTuple = record.getField(1, Tuple.class);
/* Extract the year from the date element of the order relation: */
/* pice = extendedprice * (1 - discount): */
float price = Float.parseFloat(inputTuple.getStringValueAt(5)) * (1 - Float.parseFloat(inputTuple.getStringValueAt(6)));
/* Project (orderkey | partkey, suppkey, linenumber, quantity, extendedprice, discount, tax, ...) to (partkey, suppkey, quantity): */
inputTuple.project((0 << 0) | (1 << 1) | (1 << 2) | (0 << 3) | (1 << 4));
inputTuple.addAttribute("" + price);
record.setField(1, inputTuple);
out.collect(record);
}
}